System and method for signaling status of traffic flow

• US 7,414,542 B2
• Filed: 12/02/2004
• Issued: 08/19/2008
• Est. Priority Date: 12/02/2004
• Status: Active Grant

• Current Assignee: Ent Services Development Corporation LP (DXC Technology Company)
• Original Assignee: Electronic Data Systems Corporation (Perspecta, Inc.)
• Inventors: McMahon, Timothy H.
• Primary Examiner(s): Goins; Davetta W.
• Assistant Examiner(s): Labbees; Edny
• Application Number:
  US11/002,177
• Publication Number:
  US 20060125655A1
• Time in Patent Office: 1,356 Days
• Field of Search: 340/905, 340/906, 340/907, 340/209, 340/995.1, 340/995.11, 340/995.13, 340/995.17, 340/995.19, 340/95.21, 701/209, 701/210, 701/211
• US Class Current: 340/907
• CPC Class Codes: G08G 1/087 Override of traffic control, e.g. by signal transmitted by an emergency vehicle
• CPC Class Codes: G08G 1/096811 where the route is computed offboard
• CPC Class Codes: G08G 1/096844 where the complete route is dynamically recomputed based on new data
• CPC Class Codes: G08G 1/096872 where instructions are given per voice

Abstract

In one general aspect, a method for signaling traffic flow information includes monitoring a status for a traffic restrictor, generating a wireless signal indicative of the status of the traffic restrictor, and communicating the wireless signal to a receiver. In another general aspect, a wireless receiver includes a wireless interface and a processor. The wireless interface receives a wireless signal indicative of a status of a traffic restrictor. The processor determines a portion of a route for a vehicle based upon the status of the traffic restrictor.

Claims

1. A method comprising:

identifying a destination for a first vehicle;

determining a status of at least one traffic restrictor, the at least one traffic restrictor comprising at least one of a controllable traffic control device or an uncontrollable condition;

determining an availability status of the first vehicle based on the status of the at least one traffic restrictor;

selecting an alternate vehicle if the first vehicle is unavailable;

determining at least part of a route of the first vehicle or the alternate vehicle to the destination based on the status of the at least one traffic restrictor;

determining whether a status change for one or more controllable traffic control devices is required for the route; and

initiating a change to the one or more controllable traffic control devices if the change in status of the one or more controllable traffic control devices is required.

2. The method of claim 1, wherein determining the availability status of the first vehicle based on the status of the at least one traffic restrictor comprises determining an estimated time to arrival to the destination based on the status of the at least one traffic restrictor.

3. The method of claim 1, wherein the controllable traffic control device comprises a traffic light and wherein determining the status of at the least one traffic restrictor comprises determining a light color of the traffic light for traffic associated with a particular direction of travel.

4. The method of claim 1, wherein the uncontrollable condition comprises one of a weather condition or traffic hazard and wherein determining a status of at least one traffic restrictor comprises determining a presence of a weather condition or a traffic hazard.

5. The method of claim 1, wherein selecting the alternate vehicle if the first vehicle is unavailable comprises determining a status of the at least one traffic restrictor along the route of the alternate vehicle.

6. The method of claim 1 further comprising determining an alternate route for the first or alternate vehicle based on the status of at least one traffic restrictor.

7. The method of claim 1 further comprising determining a speed and heading for the first or alternate vehicle, wherein at least the portion of the route is determined based on the speed and the heading of the first or alternate vehicle.

8. The method of claim 1, wherein determining a status of at least one traffic restrictor comprises receiving a wireless signal indicative of the status of the at least one traffic restrictor.

9. The method of claim 1, wherein initiating a change to the one or more controllable traffic control devices if the change in status of the one or more controllable traffic control devices is required comprises communicating a wireless request to change the status of the one or more controllable traffic control devices.

10. An article of manufacture comprising machine-readable storage device storing instructions for causing one or more data-processing apparatus, alone or in combination, to:

identify a destination for a first vehicle;

determine a status of at least one traffic restrictor, the at least one traffic restrictor comprising at least one of a controllable traffic control device or an uncontrollable condition;

determine at least part of a route to the destination for the first vehicle based on the status of the at least one traffic restrictor;

determine an availability status of the first vehicle based on the status of the at least one traffic restrictor;

select an alternate vehicle if the first vehicle is unavailable;

determine whether a status change for one or more controllable traffic control devices is required for the route; and

initiate a change to the one or more controllable traffic control devices if the change in status of the one or more controllable traffic control devices is required.

11. The article of manufacture of claim 10, wherein the instructions for causing the one or more data-processing apparatus to determine the availability status of the first vehicle based on the status of the at least one traffic restrictor comprise instructions for causing the data-processing apparatus to determine an estimated time to arrival to the destination based on the status of the at least one traffic restrictor.

12. The article of manufacture of claim 10, wherein the controllable traffic control device is a traffic light, wherein instructions for causing the one or more data-processing apparatus to determine a status of at least one traffic restrictor comprise instructions for causing the one or more data-processing apparatus to determine a status of the traffic light, and wherein the status of the traffic light comprises a light color for traffic associated with a particular direction of travel.

13. The article of manufacture of claim 10, wherein the uncontrollable condition comprises one of a weather condition or traffic hazard and wherein instructions for causing the one or more data-processing apparatus to determine a status of at least one traffic restrictor comprise instructions for determining a presence of a weather condition or a traffic hazard.

14. The article of manufacture of claim 10, wherein instructions for causing the one or more data-processing apparatus to select the alternate vehicle if the first vehicle is unavailable comprises instructions for causing the one or more data-processing apparatus to:

determine at least a portion of a route of the alternate vehicle to the destination; and

determine a status of the at least one traffic restrictor along the route of the alternate vehicle.

15. The article of manufacture of claim 10 further comprising instructions for determining an alternate route based on the status of at least one traffic restrictor.

16. The article of manufacture of claim 10 further comprising instructions for causing the one or more data-processing apparatus to determine a speed and heading for the first or alternate vehicle, wherein at least the portion of the route is determined based on the speed and the heading of the first or alternate vehicle.

17. The article of manufacture of claim 10, wherein the instructions for causing the one or more data-processing apparatus to determine a status of at least one traffic restrictor comprise instructions for causing the one or more data-processing apparatus to receive a wireless signal indicative of the status of the at least one traffic restrictor.

18. The article of manufacture of claim 10, wherein the instructions for causing the one or more data-processing apparatus to initiate a change to the one or more controllable traffic control devices if the change in status of the one or more controllable traffic control devices is required comprise instructions for causing the one or more data-processing apparatus to communicate a wireless request to change the status of the one or more controllable traffic control devices.

19. A traffic signaling system comprising:

at least one traffic restrictor, the at least one traffic restrictor comprising at least one of a controllable traffic control device or a device operable to identify an uncontrollable condition;

a first mobile unit; and

one or more processing units communicably coupled to the at least one traffic restrictor and the mobile unit, the one or more processing units, alone or in combination, operable to;

identify a destination;

receive a signal indicative of a status of the at least one traffic restrictor;

determine an availability status of the first mobile unit based on the status of the at least one traffic restrictor;

select an alternate mobile unit if the first mobile unit is unavailable;

determine at least part of a route of the first or alternate mobile unit to the destination based on the status of the at least one traffic restrictor;

determine whether a status change for one or more controllable traffic control devices is required for the route; and

initiate a change to the one or more controllable traffic control devices if the change in status of the one or more controllable traffic control devices is required.

20. The traffic signaling system of claim 19, wherein the one or more processing units are operable to determine the availability status of the first mobile unit based on the status of the at least one traffic restrictor by determining an estimated time to arrival to the destination based on the status of the at least one traffic restrictor.

21. The traffic signaling system of claim 19, wherein the controllable traffic control device comprises a traffic light, wherein the one or more processing units are operable to determine a status of the at least one traffic restrictor by determining a light color of the traffic light for traffic associated with a particular direction of travel.

22. The traffic signaling system of claim 19, wherein the device operable to identify an uncontrollable condition is operable to identify one of a weather condition or traffic hazard and wherein the one or more processing units are operable to determine a status of at least one traffic restrictor by determining a presence of a weather condition or a traffic hazard.

23. The traffic signaling system of claim 19, wherein the one or more processing units are operable to select the alternate mobile unit if the first mobile unit is unavailable by:

determining at least a portion of a route of the alternate mobile unit to the destination; and

determining a status of the at least one traffic restrictor along the route of the alternate mobile unit.

24. The traffic signaling system of claim 19, wherein the one or more processing units are further operable to determine an alternate route based on the status of at least one traffic restrictor.

25. The traffic signaling system of claim 19, wherein the one or more processing units are further operable to determine a speed and heading for the first or alternate mobile unit, wherein at least the portion of the route is determined based on the speed and the heading of the first or alternate mobile unit.

26. The traffic signaling system of claim 19, wherein the one or more processing units are operable to determine the status of the at least one traffic restrictor by receiving a wireless signal indicative of the status of the at least one traffic restrictor.

27. The traffic signaling system of claim 19, wherein the one or more processing units are operable to initiate the change to the one or more controllable traffic control devices if the change in status of the one or more controllable traffic control devices is required by communicating a wireless request to change the status of the one or more controllable traffic control devices.