Vehicle guidance system

• US 5,297,049 A
• Filed: 06/16/1993
• Issued: 03/22/1994
• Est. Priority Date: 11/08/1982
• Status: Expired due to Term

• Current Assignee: Thales Navigation Incorporated (MiTAC Holdings Corp.)
• Original Assignee: Adamsu Gebre, Hailemichael Gurmu
• Inventors: Gurmu, Hailemichael, Gebre, Adamsu
• Primary Examiner(s): Chin, Gary
• Application Number:
  US08/077,533
• Time in Patent Office: 279 Days
• Field of Search: 364/424.01, 364/424.02, 364/436-438, 342/454, 342/455, 340/989, 340/991, 340/992, 340/993, 340/905
• US Class Current: 701/117
• CPC Class Codes: G01C 21/3492 employing speed data or traffic data, e.g. real-time or historical traffic control systems for road vehicles involving transmission of navigation instructions to the vehicle G08G1/0968
• CPC Class Codes: G08G 1/096811 where the route is computed offboard
• CPC Class Codes: G08G 1/096827 where the route is computed onboard
• CPC Class Codes: G08G 1/096861 where the immediate route instructions are output to the driver, e.g. arrow signs for next turn

Abstract

A vehicle guidance system for guiding motor vehicles comprising a central traffic control system, a plurality of roadside equipment, and an on-board vehicle guidance and control system. The central traffic control system includes horizontal memory for storing horizontal coordinates and direction information of a locality, vertical memory for storing vertical coordinates and direction information of the locality transmitter for transmitting the horizontal and vertical information of the locality, and a system control unit for controlling the continuous transmission of the horizontal and vertical information of the locality The roadside equipment includes coordinates memory for storing the coordinates information of the roadside equipment, coordinates transmitter for transmitting the coordinates information of the roadside equipment to the vehicle, receiver for receiving destination information from the vehicle, and vehicle destination device for transmitting the coordinates information of the roadside equipment and the destination information of the vehicle to the central traffic control system. The on-board vehicle guidance and control system includes receiver for receiving the horizontal and vertical coordinates information of the locality traffic control system, vertical coordinates memory for storing the vertical coordinates information of the locality, horizontal coordinates memory for storing the horizontal coordinates information of the locality, an on-board system control unit for controlling the reception and storage of the horizontal and vertical coordinates information of the locality, display feed memory for storing route direction information for reaching the destination of the vehicle, and a display for displaying the route direction information.

Claims

1. A vehicle guidance system for guiding a motor vehicle in a municipality wherein locations within said municipality are designated by respective horizontal and vertical coordinate means, said system comprising:

a central traffic control system including;

means for transmitting dynamically alterable coordinate information representative of the whereabouts of congested route segments for use as route guidance information in accordance with detected traffic conditions,

at least one roadside equipment including;

horizontal and vertical coordinate memory means for storing coordinate information representative of said whereabouts of said congested route segments,

roadside transmitter means for transmitting roadside identification information indicative of the location of the transmitting roadside equipment and for transmitting to said vehicle said route guidance information received from the central traffic control system,

an on-board guidance unit including;

on-board receiver means for receiving said identification information and said route guidance information transmitted by said roadside equipment,

on-board vertical and horizontal coordinate memory means for storing said vertical and horizontal coordinate information transmitted from said roadside transmitter,

an on-board system control unit for controlling the reception and storage of said identification information and said route guidance information,

means for altering said coordinate information in said on-board memory means in accordance with said route guidance information transmitted by said roadside equipment, and

said on-board system control unit including means for generating vehicle guidance information in accordance with data contents of said on-board memory means and for transferring said vehicle guidance information to a display means for assisting a driver in guiding said vehicle.

2. The vehicle guidance system as recited in claim 1 wherein said on-board guidance unit includes transmitting means for transmitting at least one of destination and position information of said vehicle to said roadside equipment, and wherein

said roadside equipment further comprises:

roadside receiver means for receiving said at least one of said destination information and said position information, and

means for relaying said received information to said central traffic control system,

said central traffic control system further including;

counter means which receives information from said roadside receiver means and for counting the number of vehicles traversing a location,

destination recorder means for recording the destination of said vehicle,

route analyzer means for analyzing traffic flow information in accordance with said counter means and said destination recorder means,

predictor means responsive to said route analyzer means for predicting route congestion and for generating guidance instructions in order to permit said vehicle to circumvent the predicted congestion, and

said roadside transmitter means transmits said guidance instructions to said vehicle whereby to enable avoidance of said predicted route congestion.

3. The system as recited in claim 1 or 2 wherein the on-board guidance unit includes an instantaneous position register having data contents which indicate the position of said vehicle and means for correcting the data contents of the position register in accordance with the identification information transmitted by said roadside equipment.

4. A vehicle guidance system as recited in claim 1 or 2 wherein said on-board guidance unit further comprises:

route determination means for calculating a desired route comprising a series of decision points between an instantaneous position and a destination of said vehicle.

5. A vehicle guidance system as recited in claim 1 or 2 wherein said on-board guidance unit further comprises:

distance counter means for measuring and recording a distance traveled by the vehicle toward one of the decision points, wherein the distance counter means interacts with the on-board system control unit to display the distance remaining to said one decision point and to display instructions for reaching said one decision point.

6. The vehicle guidance system as recited in claim 5, wherein said on-board guidance unit further comprises:

steering position indicator means for determining and indicating a vehicle turning condition wherein the steering position indicator means interacts with the on-board system control unit and the distance counter means to track the movement of the vehicle.

7. A vehicle guidance system as recited in claim 1 or 2 wherein said central traffic control system includes a plurality of roadside equipments spaced throughout said municipality for communicating with said vehicle, said on-board guidance unit transferring information with at least one of said plurality of roadside equipments for retransmission to said central traffic control system.

8. A system for monitoring and guiding motor vehicles in a municipality comprising a central traffic control, a plurality of roadside equipments, and at least one vehicle having an on-board guidance unit wherein:

said central traffic control comprising,

central memory means for storing coordinate and route guidance information,

central transmission means for transmitting dynamically alterable coordinate information indicative of congested route segments in said municipality for use as route guidance information to said plurality of roadside equipments,

central receiving means for receiving information from said plurality of said roadside equipments, and

control means for controlling the transmission of said route guidance information to said roadside equipments;

at least one of said roadside equipments comprising,

roadside memory means for storing coordinate information representative of the location of said at least one roadside equipment,

first receiver means for receiving said route guidance information transmitted by the central traffic control,

first transmission means for transmitting to said at least one vehicle at least one of said coordinate information of said at least one roadside equipment and said route guidance information,

second receiver mans for receiving at least one of vehicle position and vehicle destination information from said at least one vehicle, and

second vehicle destination transmitter means connected to said second receiver means for transmitting the information received by said second receiver means to the receiver means of said central traffic control;

said on-board guidance unit comprising,

on-board memory means for storing at least one of instantaneous position information and vehicle destination information,

on-board receiver means for receiving at least one of said coordinate and route guidance information

transmitted by the first transmission means of said at least one roadside equipment,

on-board control means for controlling the reception of the information received by said on-board receiver means, and

display means for displaying a representation that is indicative of at least one of said instantaneous position information and said route guidance information transmitted by said central traffic control.

9. A system as recited in claim 8 wherein said central traffic control further comprises:

means for monitoring traffic load conditions in said municipality,

means for generating congestion avoidance information based upon said load conditions, and

wherein said route guidance information transmitted by said central traffic control includes said congestion avoidance information.

10. A system as recited in claim 8 wherein said central traffic control further includes predictor means for predicting congestion at a certain location in said municipality, said predictor means comprising:

means for receiving position and destination information of vehicles,

means for determining congestion at said certain location based upon the position and destination of said vehicles, and

means for generating congestion avoidance information in accordance with said means for determining,

wherein said route guidance information transmitted by said central traffic control includes said congestion avoidance information generated by said predictor means.

11. A method for use in a traffic management system for directing the movement of a motor vehicle in a municipality wherein the system comprises a central traffic control which includes at least one roadside equipment for communicating with passing vehicles and at least one on-board monitoring unit located in a vehicle, and wherein locations within said municipality are designated by respective horizontal and vertical coordinate means, said method comprising the steps of:

in the central traffic control;

transmitting dynamically alterable coordinate information representative of congested routes for use as route guidance information in accordance with detected traffic conditions,

in said at least one roadside equipment;

providing horizontal and vertical coordinate memory means for storing coordinate information representative of said congested routes,

transmitting roadside identification information indicative of the location of the transmitting roadside equipment and transmitting to said vehicle said route guidance information received from the central traffic control for avoiding said congested routes,

in said on-board guidance unit including;

providing on-board receiver means for receiving said identification information and said route guidance information transmitted by said roadside equipment,

storing vertical and horizontal coordinate information representative of said congested routes in an on-board vertical and horizontal coordinate memory means,

controlling the reception and storage of said identification information and said congested route information,

updating said coordinate information in said on-board memory means in accordance with coordinates representing said congested routes transmitted by said at least one roadside equipment, and

generating vehicle guidance information in accordance with data contents of said on-board

memory and transferring said vehicle guidance information to display means for assisting a driver in directing said vehicle in said municipality.

12. A method as recited in claim 11 further including the steps of:

transmitting from said vehicle one of destination and position information of said vehicle to said at least one roadside equipment,

receiving from said vehicle at said at least one roadside equipment one of said destination information and said position information, and

relaying said received information from said at least one roadside equipment to said central traffic control system,

counting at the central traffic control information received from said at least one roadside representing the number of vehicles traversing a location,

recording the destination of said vehicle,

analyzing traffic flow information in accordance with said counted number of vehicles and said recorded destination,

predicting route congestion based on said analyzed traffic flow information and generating said route guidance information in order to permit said vehicle to circumvent said predicted route congestion, and

transmitting from said roadside transmitter means said route guidance information to said vehicle whereby to enable avoidance of said predicted route congestion.

13. A method as recited in claim 11 or 12 further including the steps of:

providing an instantaneous position register in said on-board guidance unit having data contents which indicate the position of said vehicle, and

correcting the data contents of said position register in accordance with the identification information transmitted by said at least one roadside equipment.

14. A method as recited in claim 11 or 12 further including the step of calculating a route to determine a series of decision points between an instantaneous position and a destination of said vehicle and displaying said calculated route to an operator of said vehicle.

15. The vehicle guidance system as recited in claim 11 or 12 further including the step of:

measuring and recording a distance traveled by the vehicle toward one of the decision points

wherein the distance interacts with the on-board guidance unit to display the distance remaining to said one decision point and to display instructions for reaching said one decision point.

16. A method as recited in claim 15, further including the step of determining the steering position of said vehicle during a turning condition wherein the steering position indicator means interacts with the on-board system control unit and the distance counter means to track the movement of the vehicle.

17. A method as recited in claim 11 or 12 further including the steps of:

transmitting from said vehicle at least one of said destination and coordinate information of said vehicle to one of a plurality of roadside equipments spaced throughout said municipality, and retransmitting said at least one information from one roadside equipment to said central traffic control.

18. A vehicle guidance system for guiding a motor vehicle in a municipality wherein locations within said municipality are designated by a plurality of decision points represented by horizontal and vertical coordinates and a plurality of links interconnecting said decision points, said system comprising a central traffic control system which includes at least one

roadside equipment and at least one on-board guidance unit located in said vehicle,

said central traffic control system including;

memory means for storing in a primary data segment a representation of at least one primary street in the municipality having an associated plurality of decision points representing crossing streets intersecting said at least one primary street, and for storing in a crossing street data segment representations of vertical and horizontal coordinate information associated with said decision points along said at least one primary street,

means for transmitting a representation of data contents of said memory means wherein said contents are dynamically alterable in accordance with a detection of congested routes for uses as route guidance information by said vehicle,

said at least one roadside equipment including;

horizontal and vertical coordinate memory means for storing said route guidance information received from said central control system which is indicative of said congested routes,

roadside transmitter means for transmitting roadside identification information indicative of the location of said at least one roadside

equipment and for transmitting to said vehicle said route guidance information received from the central traffic control system,

said on-board guidance unit including;

on-board receiver means for receiving said identification information and said route guidance information transmitted by said at least one roadside equipment,

an on-board system control unit for controlling the reception and storage of said identification information and said route guidance information,

on-board memory means for storing in a primary data segment a representation of said at least one primary street in the municipality having an associated plurality of decision points representing crossing streets intersecting said primary street, and for storing in a crossing street data segment said vertical and horizontal coordinate information associated with said decision points along said primary street, at least one bearing representation of a route direction from one of said decision points to a next decision point, a programmed distance representation indicative of the distance between at least two of said decision points, and a representation of a crossing street name,

means for altering data contents of said on-board memory means in accordance with said route guidance information transmitted by said at least one roadside equipment, and said on-board system control unit including means for generating guidance instructions in accordance with the data contents of said on-board memory means and for transferring said guidance instructions to a display means for assisting a driver in guiding said vehicle.

19. A vehicle guidance system for guiding a motor vehicle in a municipality wherein locations within said municipality are designated by representations of horizontal and vertical coordinates, said system comprising:

a central traffic control system including;

memory means for storing in a primary data segment a representation of at least one primary street in the municipality having an associated plurality of decision points representing crossing streets intersecting said primary street, and for storing in a crossing street data segment representations of vertical and horizontal coordinate information associated with said decision points along said primary street,

means for transmitting a representation of data contents of said memory means wherein said contents are dynamically alterable in accordance with a detection of congested route segments for use as route guidance information by said vehicle,

and an on-board guidance unit including;

on-board receiver means for receiving the transmitted dynamically alterable contents of said memory means transmitted by said central traffic control system,

an on-board system control unit for controlling the reception and storage of said alterable contents received by said on-board receiver,

on-board memory means for storing in a primary data segment a representation of said at least one primary street in the municipality having an associated plurality of decision points representing crossing streets intersecting said primary street, and for storing in a crossing street data segment said vertical and horizontal coordinate information associated with said decision points along said primary street, at least one bearing representation of a route direction from one of said decision points to a next decision point, and a crossing street identification representation for referencing said crossing street in said primary data segment,

means connected with said on-board system control unit for altering data contents of said on-board memory means in accordance with said route guidance information transmitted by said central traffic control system, and

said on-board system control unit including means for generating guidance instructions in accordance with the data contents of said on-board memory means and for transferring said guidance instructions to a display means for assisting a driver in guiding said vehicle.