Methods and software for managing vehicle priority in a self-organizing traffic control system

• US 9,761,136 B2
• Filed: 12/28/2016
• Issued: 09/12/2017
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Carnegie Mellon University
• Original Assignee: Carnegie Mellon University
• Inventors: Tonguz, Ozan, Viriyasitavat, Wantanee
• Primary Examiner(s): Do, Truc M
• Application Number:
  US15/392,550
• Publication Number:
  US 20170110011A1
• Time in Patent Office: 258 Days
• Field of Search: None
• CPC Class Codes: G08G 1/087 Override of traffic control, e.g. by signal transmitted by an emergency vehicle
• CPC Class Codes: G08G 1/161 Decentralised systems, e.g. inter-vehicle communication

Abstract

Methods and software for managing vehicle priority proximate to a potential travel-priority conflict zone, such as a roadway intersection, where travel conflicts, such as crossing traffic, can arise. Coordination involves forming an ad-hoc network in a region containing the conflict zone using, for example, vehicle-to-vehicle communications and developing a dynamic traffic control plan based on information about vehicles approaching the conflict zone. Instructions based on the dynamic traffic control plan are communicated to devices aboard vehicles in the ad-hoc network, which display one or more virtual traffic signals to the operators of the vehicles and/or control the vehicles (for example, in autonomous vehicles) in accordance with the dynamic traffic control plan, which may account for a priority level associated with one or more of the vehicles.

Claims

1. A non-transitory machine-readable storage medium containing machine-executable instructions for performing a method of managing vehicle priority proximate to a potential travel-priority conflict zone, the method being executed in a dynamic traffic control system, said machine-executable instructions comprising:

a first set of machine-executable instructions for communicating with a first component of the dynamic traffic control system located on-board a vehicle proximate to the potential travel-priority conflict zone so as to establish a dynamic traffic control plan for avoiding a travel-priority conflict in the potential travel-priority conflict zone;

a second set of machine-executable instructions for coordinating with the first component of the dynamic traffic control system via said communicating to elect a dynamic traffic controller as a temporary coordinator vehicle responsible for temporarily coordinating the dynamic traffic control plan;

a third set of machine-executable instructions for receiving a priority-request message from a priority vehicle;

a fourth set of machine-executable instructions for determining a travel direction of the priority vehicle;

a fifth set of machine-executable instructions for comparing the travel direction of the priority vehicle to a travel direction of a non-priority vehicle proximate to the potential travel-priority conflict zone;

a sixth set of machine-executable instructions for transmitting a priority-granted message to the priority vehicle when the travel direction of the priority vehicle and the travel direction of the non-priority vehicle proximate to the potential travel-priority conflict zone differ; and

a seventh set of machine-executable instructions for providing traffic control instructions to an operator of the priority vehicle via a visual or audio indication produced in the priority vehicle as a function of the priority-granted message.

2. A non-transitory machine-readable storage medium according to claim 1, wherein said third set of machine-executable instructions includes machine-executable instructions for receiving a priority-request message from an emergency vehicle.

3. A non-transitory machine-readable storage medium according to claim 1, further comprising machine-executable instructions for receiving a priority-clear message from the priority vehicle.

4. A non-transitory machine-readable storage medium according to claim 1, further comprising machine-executable instructions for implementing vehicle-to-vehicle communication.

5. A non-transitory machine-readable storage medium according to claim 1, further comprising machine-executable instructions for revoking priority for the priority vehicle if no transmissions are received from the priority vehicle for a predetermined period of time.

6. A non-transitory machine-readable storage medium containing machine-executable instructions for performing a method of managing vehicle priority proximate to a potential travel-priority conflict zone, the method being executed in a dynamic traffic control system, said machine-executable instructions comprising:

a first set of machine-executable instructions for communicating with a first component of the dynamic traffic control system located on-board a vehicle proximate to the potential travel-priority conflict zone so as to establish a dynamic traffic control plan for avoiding a travel-priority conflict in the potential travel-priority conflict zone;

a second set of machine-executable instructions for coordinating with the first component of the dynamic traffic control system via said communicating to elect a dynamic traffic controller as a temporary coordinator vehicle responsible for temporarily coordinating the dynamic traffic control plan;

a third set of machine-executable instructions for receiving a priority-request message from a priority vehicle;

a fourth set of machine-executable instructions for determining a travel direction of the priority vehicle;

a fifth set of machine-executable instructions for comparing the travel direction of the priority vehicle to a travel direction of a non-priority vehicle proximate to the potential travel-priority conflict zone; and

a sixth set of machine-executable instructions for, when the travel direction of the priority vehicle and the travel direction of the non-priority vehicle proximate to the potential travel- priority conflict zone are the same, coordinating with the first component of the dynamic traffic control system via said communicating to hand over responsibility for coordinating the dynamic traffic control plan to a new temporary coordinator vehicle by electing a second dynamic traffic controller as a second temporary coordinator vehicle responsible for temporarily coordinating the dynamic traffic control plan.

7. A non-transitory machine-readable storage medium according to claim 6, wherein said third set of machine-executable instructions includes machine-executable instructions for receiving a priority-request message from an emergency vehicle.

8. A non-transitory machine-readable storage medium according to claim 6, further comprising machine-executable instructions for receiving a priority-clear message from the priority vehicle.

9. A non-transitory machine-readable storage medium according to claim 6, further comprising machine-executable instructions for implementing vehicle-to-vehicle communication.

10. A non-transitory machine-readable storage medium according to claim 6, further comprising machine-executable instructions for revoking priority for the priority vehicle if no transmissions are received from the priority vehicle for a predetermined period of time.