System and method for controlling a traffic light

• US 6,724,320 B2
• Filed: 07/09/2001
• Issued: 04/20/2004
• Est. Priority Date: 07/09/2001
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Basson, Sara H., Zadrozny, Wlodek W., Kanevsky, Dimitri
• Primary Examiner(s): TRIEU, VAN THANH
• Application Number:
  US09/901,409
• Publication Number:
  US 20030006909A1
• Time in Patent Office: 1,016 Days
• Field of Search: 340/902, 340/904, 340/906, 340/907, 340/924, 340/988, 340/990, 340/995, 340/994, 340/995.13, 340/995.19, 340/995.2, 701/200, 701/201, 701/213, 180/168
• US Class Current: 340/906
• CPC Class Codes: G08G 1/087 Override of traffic control, e.g. by signal transmitted by an emergency vehicle

Abstract

There is provided a system and method for controlling at least one traffic light having a vehicle having a transmitter and a receiver for transmitting and receiving traffic control signals, and a control unit for processing traffic control signals; and a traffic control module having a transmitter and a receiver for transmitting and receiving traffic control signals, a control unit for processing traffic control signals, traffic light control logic for controlling the at least one traffic light, and means to connect to the at least one traffic light; wherein the traffic control signals control the flow of traffic about the at least one traffic light enabling a vehicle to travel from a present location to a destination passing through intersections at which traffic flow is controlled by the at least one traffic light; and also including means for controlling at least one traffic light on a selected optimal route in response to the traffic control signals.

Claims

1. A system for controlling at least one traffic light, the system comprising:

at least one first module having a first transceiver for transmitting and receiving traffic control signals, and having a first control unit for processing said traffic control signals;

at least one second module having a second transceiver for transmitting and receiving said traffic control signals, and having a second control unit for processing said traffic control signals;

a routing decision module for automatically selecting an optimal route between a vehicle and a destination, the vehicle including the first module; and

means for controlling at least one traffic light on said selected optimal route in response to said traffic control signals.

2. The system for controlling at least one traffic light of claim 1, wherein said first module is located in at least one vehicle.

3. The system for controlling at least one traffic light of claim 2, wherein said at least one traffic light is controlled via said traffic control signals such that the color of said at least one traffic light is green in a direction of travel of said vehicle to said destination on said selected optimal route.

4. The system for controlling at least one traffic light of claim 3, wherein said routing decision module selects a street route between said vehicle and said destination, and determines an indication of traffic flow on said street route, and an indication of the number and status of traffic lights along said street route.

5. The system for controlling at least one traffic light of claim 3, further comprising:

a global positioning system for determining a location of said vehicle; and

means for communicating said position to said routing decision module.

6. The system for controlling at least one traffic light of claim 5, wherein said traffic control signals contain a priority rating for determining a priority of processing said traffic control signals.

7. The system for controlling at least one traffic light of claim 1, wherein said second module is located in at least one traffic control module connected to said at least one traffic light.

8. A system for controlling at least one traffic light, comprising:

at least one vehicle having a transceiver for transmitting and receiving traffic control signals, and a control unit for processing said traffic control signals;

at least one traffic control module having a transceiver for transmitting and receiving said traffic control signals, a control unit for processing said traffic control signals, and logic for controlling at least one traffic light;

a routing decision module for automatically selecting an optimal traffic route between said vehicle and a destination, wherein said traffic control signals control the flow of traffic about said at least one traffic light, said at least one traffic light being located on said selected optimal traffic route, said routing decision module enabling said vehicle to travel from a present location to a destination by traveling on the selected optimal traffic route.

9. The system for controlling at least one traffic light of claim 8, wherein said at least one traffic light is controlled via said traffic control signals such that the color of said at least one traffic light is green in a direction of travel of said vehicle to said destination on said selected optimal traffic route.

10. The system for controlling at least one traffic light of claim 9, wherein said routing decision module selects a street route between said vehicle and said destination, and determines an indication of traffic flow on said street route, and an indication of the number and status of traffic lights along said street route.

11. The system for controlling at least one traffic light of claim 8, further comprising:

a global positioning system for determining a location of said vehicle; and

means for communicating said position to said routing decision module.

12. The system for controlling at least one traffic light of claim 11, wherein said traffic control signals contain a priority rating for determining a priority of processing said traffic control signals.

13. A method of controlling at least one traffic light, comprising:

determining a location of a vehicle;

automatically selecting an optimal route from said location to a destination;

transmitting traffic control signals from said vehicle;

controlling at least one traffic light located along the selected optimal route via said control signals to permit passage of said vehicle through said traffic light; and

transmitting traffic light control signals from said vehicle to said traffic light after said vehicle passes through said traffic light to release control of said traffic light.

14. The method for controlling at least one traffic light of claim 13, further comprising the steps of:

transmitting a signal from said vehicle indicating a turning direction of said vehicle at an intersection; and

controlling said at least one traffic light based on said signal indicating said turning direction of said vehicle.

15. The method for controlling at least one traffic light of claim 13, further comprising the steps of:

setting a timer when said traffic control signals are transmitted from said vehicle;

receiving a confirmation signal from said at least one traffic light confirming receipt of said traffic control signal; and

displaying a message at said vehicle if said timer expires prior to receipt of said confirmation.

16. The method for controlling at least one traffic light of claim 13, further comprising:

inputting a destination of said vehicle.

17. The method of claim 16, wherein the location of said vehicle is determined by a global positioning system.

18. The method of claim 16, further comprising the steps of:

determining a number of vehicles located at an intersection traveling on the streets adjoining the intersection;

further selecting said optimal route by including information of the number of vehicles during said selecting of said optimal route.

19. The method for controlling at least one traffic light of claim 18, wherein said traffic control signals contain a priority rating for determining a priority of processing said traffic control signals.