Road traffic monitoring system

US 20020145541A1
Filed: 03/29/2002
Published: 10/10/2002
Est. Priority Date: 03/30/2001
Status: Active Grant

First Claim

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1. A road traffic monitoring system, which comprises:

vehicle-mounted wireless ID devices that are mounted in every vehicle traveling upon a road, that store an encoded identification number containing a vehicle identification number and other ID information, and that transmit some or all of said encoded identification number upon receiving a stipulated request for response;

roadside traffic monitoring devices installed at intersections where three or more entrances and exits meet or other strategic traffic monitoring areas; and

roadside wireless devices that are installed at every entrance to a monitoring area at which one of said roadside traffic monitoring devices is installed, and at every exit from said monitoring area, that emit a request for response to vehicles that pass through a stipulated monitoring region, and that receive identification numbers transmitted by the vehicle-mounted wireless ID devices of traveling vehicles in response to this request for response, wherein, all roadside wireless devices transmit the identification numbers sent from the vehicle-mounted wireless ID devices of the traveling vehicles to the roadside traffic monitoring devices, and upon receiving identification numbers from the various roadside wireless devices, the roadside traffic monitoring device determines a time series for the position information of vehicles in the monitoring area, thereby identifying the movement status of each vehicle.

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Abstract

Roadside wireless devices (1) are installed at roadside positions corresponding to the traffic lanes entering an intersection. Roadside wireless devices (1) are also installed at roadside positions corresponding to the traffic lanes exiting an intersection. The roadside wireless devices (1) on the entrance side receive an identification number from vehicle-mounted wireless ID devices (3) of vehicles entering the intersection and transmit them to a roadside traffic monitoring device (2). Thereafter, the roadside wireless devices (1) on the exit side receive an identification number from the vehicle-mounted wireless ID devices (3) of vehicles exiting the intersection and transmit them to the roadside traffic monitoring device (2). From the identification numbers received, the roadside traffic monitoring device (2) is able to determine the entrance from which a vehicle judged to be the same one had entered and the exit from which it exited, along with the type of vehicle. Short-term and long-term statistical data on the flow of vehicles and the situation of road usage can be acquired efficiently.

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120 Claims

1. A road traffic monitoring system, which comprises:
- vehicle-mounted wireless ID devices that are mounted in every vehicle traveling upon a road, that store an encoded identification number containing a vehicle identification number and other ID information, and that transmit some or all of said encoded identification number upon receiving a stipulated request for response;
  
  roadside traffic monitoring devices installed at intersections where three or more entrances and exits meet or other strategic traffic monitoring areas; and
  
  roadside wireless devices that are installed at every entrance to a monitoring area at which one of said roadside traffic monitoring devices is installed, and at every exit from said monitoring area, that emit a request for response to vehicles that pass through a stipulated monitoring region, and that receive identification numbers transmitted by the vehicle-mounted wireless ID devices of traveling vehicles in response to this request for response, wherein, all roadside wireless devices transmit the identification numbers sent from the vehicle-mounted wireless ID devices of the traveling vehicles to the roadside traffic monitoring devices, and upon receiving identification numbers from the various roadside wireless devices, the roadside traffic monitoring device determines a time series for the position information of vehicles in the monitoring area, thereby identifying the movement status of each vehicle.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120)
- - 2. The road traffic monitoring system according to claim 1, wherein when said roadside traffic monitoring device determines that the geographical location of installation of the roadside wireless device that reported the identification number is on an entrance to the monitoring area in question, then a category based on the identification number of the detected vehicle and a temporary record are made, and in the case that the reported identification number is the same as an identification number already present in the records, then the probability of a duplicate measurement due to a temporary halt because of traffic congestion or a traffic signal or the like is high, so the duplicated vehicle detection information is excluded from monitoring, and wherein when said roadside traffic monitoring device detects that a vehicle detected on the entrance and temporarily recorded is detected by a roadside wireless device installed on an exit, it is assumed to have passed from the entrance to the exit on which the various roadside wireless devices are installed, and left the monitoring area, so the temporary record regarding the vehicle in question is deleted.
  - 3. The road traffic monitoring system according to claim 1, wherein said roadside traffic monitoring device has a function for generating and a function for sending measured data by tabulating count items such as the number of vehicles that reached said monitoring area, their travel routes and the like, and said measured data is transmitted to a central monitoring device of a central monitoring center that controls all monitoring areas present within an administrative region, and wherein said central monitoring device of a central monitoring center has a function for further tabulating measured data transmitted from the roadside traffic monitoring devices of various monitoring areas over fixed time intervals, a function for categorizing and recording monitoring data, and a function for displaying monitoring data.
  - 4. The road traffic monitoring system according to claim 2, wherein said roadside traffic monitoring device has a function for generating and a function for sending measured data by tabulating count items such as the number of vehicles that reached said monitoring area, their travel routes and the like, and said measured data is transmitted to a central monitoring device of a central monitoring center that controls all monitoring areas present within an administrative region, and wherein said central monitoring device of a central monitoring center has a function for further tabulating measured data transmitted from the roadside traffic monitoring devices of various monitoring areas over fixed time intervals, a function for categorizing and recording monitoring data, and a function for displaying monitoring data.
  - 5. The road traffic monitoring system according to claim 1, wherein said roadside wireless device operates in coordination with a vehicle detection sensor that uses the technology of an ultrasonic detector, an infrared detector, a magnetic detector, a radio detector or the like which detects a vehicle traveling upon a road, and the request for response by wireless signal is emitted remotely toward the traveling vehicle detected by the vehicle detection sensor.
  - 6. The road traffic monitoring system according to claim 2, wherein said roadside wireless device operates in coordination with a vehicle detection sensor that uses the technology of an ultrasonic detector, an infrared detector, a magnetic detector, a radio detector or the like which detects a vehicle traveling upon a road, and the request for response by wireless signal is emitted remotely toward the traveling vehicle detected by the vehicle detection sensor.
  - 7. The road traffic monitoring system according to claim 3, wherein said roadside wireless device operates in coordination with a vehicle detection sensor that uses the technology of an ultrasonic detector, an infrared detector, a magnetic detector, a radio detector or the like which detects a vehicle traveling upon a road, and the request for response by wireless signal is emitted remotely toward the traveling vehicle detected by the vehicle detection sensor.
  - 8. The road traffic monitoring system according to claim 4, wherein said roadside wireless device operates in coordination with a vehicle detection sensor that uses the technology of an ultrasonic detector, an infrared detector, a magnetic detector, a radio detector or the like which detects a vehicle traveling upon a road, and the request for response by wireless signal is emitted remotely toward the traveling vehicle detected by the vehicle detection sensor.
  - 9. The road traffic monitoring system according to claim 5, wherein the directionality of the transceiver antennas provided on said roadside wireless device suppresses side lobes, and forms a pattern wherein the wireless signal intensity at the boundary with adjacent lanes is 20-40 dB lower than that at the center of the traffic lane, and also, in the exchange of signals with the vehicle-mounted wireless ID device of the traveling vehicle, a spatial arrangement is adopted that prevents the interference of radio signals including those of different traveling vehicles and malfunctions due thereto.
  - 10. The road traffic monitoring system according to claim 6, wherein the directionality of the transceiver antennas provided on said roadside wireless device suppresses side lobes, and forms a pattern wherein the wireless signal intensity at the boundary with adjacent lanes is 20-40 dB lower than that at the center of the traffic lane, and also, in the exchange of signals with the vehicle-mounted wireless ID device of the traveling vehicle, a spatial arrangement is adopted that prevents the interference of radio signals including those of different traveling vehicles and malfunctions due thereto.
  - 11. The road traffic monitoring system according to claim 7, wherein the directionality of the transceiver antennas provided on said roadside wireless device suppresses side lobes, and forms a pattern wherein the wireless signal intensity at the boundary with adjacent lanes is 20-40 dB lower than that at the center of the traffic lane, and also, in the exchange of signals with the vehicle-mounted wireless ID device of the traveling vehicle, a spatial arrangement is adopted that prevents the interference of radio signals including those of different traveling vehicles and malfunctions due thereto.
  - 12. The road traffic monitoring system according to claim 8, wherein the directionality of the transceiver antennas provided on said roadside wireless device suppresses side lobes, and forms a pattern wherein the wireless signal intensity at the boundary with adjacent lanes is 20-40 dB lower than that at the center of the traffic lane, and also, in the exchange of signals with the vehicle-mounted wireless ID device of the traveling vehicle, a spatial arrangement is adopted that prevents the interference of radio signals including those of different traveling vehicles and malfunctions due thereto.
  - 13. The road traffic monitoring system according to claim 5, wherein each roadside wireless device is provided with a corresponding vehicle registration number optical reading device for monitoring to make sure that some or all of the information of the identification number of traveling vehicles received by said roadside wireless device is not contradictory regarding the traveling vehicle, and said roadside traffic monitoring device has a function for determining the presence of contradictions by comparing the information obtained from both the roadside wireless devices and the optical reading devices.
  - 14. The road traffic monitoring system according to claim 6, wherein each roadside wireless device is provided with a corresponding vehicle registration number optical reading device for monitoring to make sure that some or all of the information of the identification number of traveling vehicles received by said roadside wireless device is not contradictory regarding the traveling vehicle, and said roadside traffic monitoring device has a function for determining the presence of contradictions by comparing the information obtained from both the roadside wireless devices and the optical reading devices.
  - 15. The road traffic monitoring system according to claim 7, wherein each roadside wireless device is provided with a corresponding vehicle registration number optical reading device for monitoring to make sure that some or all of the information of the identification number of traveling vehicles received by said roadside wireless device is not contradictory regarding the traveling vehicle, and said roadside traffic monitoring device has a function for determining the presence of contradictions by comparing the information obtained from both the roadside wireless devices and the optical reading devices.
  - 16. The road traffic monitoring system according to claim 8, wherein each roadside wireless device is provided with a corresponding vehicle registration number optical reading device for monitoring to make sure that some or all of the information of the identification number of traveling vehicles received by said roadside wireless device is not contradictory regarding the traveling vehicle, and said roadside traffic monitoring device has a function for determining the presence of contradictions by comparing the information obtained from both the roadside wireless devices and the optical reading devices.
  - 17. The road traffic monitoring system according to claim 5, wherein each roadside wireless device is provided with a corresponding optical video camera for comparing the vehicle type and body color for monitoring to make sure that some or all of the information of the identification number of traveling vehicles received by said roadside wireless device is not contradictory regarding the traveling vehicle, and said roadside traffic monitoring device has a function for determining the presence of contradictions by comparing the information obtained from both the roadside wireless devices and the optical video camera.
  - 18. The road traffic monitoring system according to claim 6, wherein each roadside wireless device is provided with a corresponding optical video camera for comparing the vehicle type and body color for monitoring to make sure that some or all of the information of the identification number of traveling vehicles received by said roadside wireless device is not contradictory regarding the traveling vehicle, and said roadside traffic monitoring device has a function for determining the presence of contradictions by comparing the information obtained from both the roadside wireless devices and the optical video camera.
  - 19. The road traffic monitoring system according to claim 7, wherein each roadside wireless device is provided with a corresponding optical video camera for comparing the vehicle type and body color for monitoring to make sure that some or all of the information of the identification number of traveling vehicles received by said roadside wireless device is not contradictory regarding the traveling vehicle, and said roadside traffic monitoring device has a function for determining the presence of contradictions by comparing the information obtained from both the roadside wireless devices and the optical video camera.
  - 20. The road traffic monitoring system according to claim 8, wherein each roadside wireless device is provided with a corresponding optical video camera for comparing the vehicle type and body color for monitoring to make sure that some or all of the information of the identification number of traveling vehicles received by said roadside wireless device is not contradictory regarding the traveling vehicle, and said roadside traffic monitoring device has a function for determining the presence of contradictions by comparing the information obtained from both the roadside wireless devices and the optical video camera.
  - 21. The road traffic monitoring system according to claim 1, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 22. The road traffic monitoring system according to claim 2, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 23. The road traffic monitoring system according to claim 3, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 24. The road traffic monitoring system according to claim 4, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 25. The road traffic monitoring system according to claim 5, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 26. The road traffic monitoring system according to claim 6, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 27. The road traffic monitoring system according to claim 7, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 28. The road traffic monitoring system according to claim 8, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 29. The road traffic monitoring system according to claim 9, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 30. The road traffic monitoring system according to claim 10, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 31. The road traffic monitoring system according to claim 11, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 32. The road traffic monitoring system according to claim 12, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 33. The road traffic monitoring system according to claim 13, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 34. The road traffic monitoring system according to claim 14, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 35. The road traffic monitoring system according to claim 15, wherein, said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 36. The road traffic monitoring system according to claim 16, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 37. The road traffic monitoring system according to claim 17, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 38. The road traffic monitoring system according to claim 18, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 39. The road traffic monitoring system according to claim 19, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 40. The road traffic monitoring system according to claim 20, wherein said roadside traffic monitoring device comprises:
    - specified vehicle identification information storage means that stores specified vehicle identification information entered from outside including the vehicle registration number of a specified vehicle, its vehicle type and other characteristics of the vehicle, and specified vehicle search means that searches for the presence of information pertaining to a specified vehicle within information acquired regarding vehicles that are traveling upon the road in said monitoring area.
  - 41. The road traffic monitoring system according claim 1, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 42. The road traffic monitoring system according claim 2, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 43. The road traffic monitoring system according claim 3, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 44. The road traffic monitoring system according claim 4, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 45. The road traffic monitoring system according claim 5, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 46. The road traffic monitoring system according claim 6, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 47. The road traffic monitoring system according claim 7, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 48. The road traffic monitoring system according claim 8, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 49. The road traffic monitoring system according claim 9, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 50. The road traffic monitoring system according claim 10, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 51. The road traffic monitoring system according claim 11, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 52. The road traffic monitoring system according claim 12, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 53. The road traffic monitoring system according claim 13, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 54. The road traffic monitoring system according claim 14, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 55. The road traffic monitoring system according claim 15, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 56. The road traffic monitoring system according claim 16, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 57. The road traffic monitoring system according claim 17, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 58. The road traffic monitoring system according claim 18, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 59. The road traffic monitoring system according claim 19, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 60. The road traffic monitoring system according claim 20, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 61. The road traffic monitoring system according claim 21, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 62. The road traffic monitoring system according claim 22, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 63. The road traffic monitoring system according claim 23, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 64. The road traffic monitoring system according claim 24, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 65. The road traffic monitoring system according claim 25, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 66. The road traffic monitoring system according claim 26, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 67. The road traffic monitoring system according claim 27, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 68. The road traffic monitoring system according claim 28, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 69. The road traffic monitoring system according claim 29, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 70. The road traffic monitoring system according claim 30, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 71. The road traffic monitoring system according claim 31, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 72. The road traffic monitoring system according claim 32, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 73. The road traffic monitoring system according claim 33, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 74. The road traffic monitoring system according claim 34, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 75. The road traffic monitoring system according claim 35, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 76. The road traffic monitoring system according claim 36, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 77. The road traffic monitoring system according claim 37, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 78. The road traffic monitoring system according claim 38, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 79. The road traffic monitoring system according claim 39, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 80. The road traffic monitoring system according claim 40, wherein said roadside traffic monitoring device comprises:
    - monitoring information storage means that is able to store and keep monitoring information collected from the various roadside wireless devices continuously for at least a stipulated length of time or more, and when stipulated discard conditions are met, the monitoring information is discarded and the monitoring information storage is filled anew.
  - 81. The road traffic monitoring system according to claim 41, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 82. The road traffic monitoring system according to claim 42, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 83. The road traffic monitoring system according to claim 43, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 84. The road traffic monitoring system according to claim 44, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 85. The road traffic monitoring system according to claim 45, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 86. The road traffic monitoring system according to claim 46, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 87. The road traffic monitoring system according to claim 47, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 88. The road traffic monitoring system according to claim 48, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 89. The road traffic monitoring system according to claim 49, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 90. The road traffic monitoring system according to claim 50, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 91. The road traffic monitoring system according to claim 51, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 92. The road traffic monitoring system according to claim 52, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 93. The road traffic monitoring system according to claim 53, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 94. The road traffic monitoring system according to claim 54, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 95. The road traffic monitoring system according to claim 55, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 96. The road traffic monitoring system according to claim 56, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 97. The road traffic monitoring system according to claim 57, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 98. The road traffic monitoring system according to claim 58, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 99. The road traffic monitoring system according to claim 59, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 100. The road traffic monitoring system according to claim 60, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 101. The road traffic monitoring system according to claim 61, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 102. The road traffic monitoring system according to claim 62, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 103. The road traffic monitoring system according to claim 63, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 104. The road traffic monitoring system according to claim 64, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 105. The road traffic monitoring system according to claim 65, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 106. The road traffic monitoring system according to claim 66, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 107. The road traffic monitoring system according to claim 67, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 108. The road traffic monitoring system according to claim 68, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 109. The road traffic monitoring system according to claim 69, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 110. The road traffic monitoring system according to claim 70, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 111. The road traffic monitoring system according to claim 71, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 112. The road traffic monitoring system according to claim 72, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 113. The road traffic monitoring system according to claim 73, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 114. The road traffic monitoring system according to claim 74, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 115. The road traffic monitoring system according to claim 75, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 116. The road traffic monitoring system according to claim 76, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 117. The road traffic monitoring system according to claim 77, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 118. The road traffic monitoring system according to claim 78, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 119. The road traffic monitoring system according to claim 79, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.
  - 120. The road traffic monitoring system according to claim 80, wherein said roadside traffic monitoring device comprises:
    - designated monitoring information storage means that is able to store designated monitoring information among the monitoring information stored in the monitoring information storage means, and upon receiving a designated monitoring information storage order, the roadside traffic monitoring system stores monitoring information up until a stipulated length of time previously among the most recent monitoring information stored in the monitoring information storage means as designated monitoring information in the designated monitoring information storage means, and wherein said central monitoring device of a central monitoring center may transmit a designated monitoring information storage order to a roadside traffic monitoring device at any monitoring area within its administrative region, and also, may extract monitoring information from the designated monitoring information storage means of the roadside traffic monitoring device to which the designated monitoring information storage order was sent.

Specification

Resources

Litigation Campaign Assessment

Current Assignee
Kinashi Denki Manufacturing Company Limited, National Institute of Information and Communications Technology
Original Assignee
Communications RES Lab IND Admin Institute
Inventors
Kobayashi, Akira, Yuzawa, Harunobu, Matsui, Toshiaki

Granted Patent

US 6,781,523 B2
Time in Patent Office

Days
Field of Search
US Class Current

340/934
CPC Class Codes

G07B 15/063   using wireless information ...

G08G 1/0104   Measuring and analyzing of ...

G08G 1/017   identifying vehicles G08G1/...

Road traffic monitoring system

First Claim

2 Assignments

0 Petitions

Accused Products

Abstract

65 Citations

120 Claims

Specification

Solutions

Use Cases

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Road traffic monitoring system

First Claim

2 Assignments

Subscription Required

Subscription Required

0 Petitions

Subscription Required

Accused Products

Subscription Required

Abstract

65 Citations

120 Claims

Specification

Subscription Required

Solutions

Use Cases

Quick Links