Collaborative distributed agent-based traffic light system and method of use

Patent metadata

Field	Value
Publication number	US-11715371-B2
Application number	US-202117645878-A
Country	US
Kind code	B2
Filing date	Dec 23, 2021
Priority date	Jun 25, 2019
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

In this disclosure, collaborative multi-agent-based TST is presented with dedicated intersection controllers that include software agents which read local and remote detection systems and then collaboratively optimize signal timing phases by considering the feedback of all controller agents that may be affected by a change. The disclosure also presents an augmented system which considers network input from handheld remote devices to update certain traffic light phase information and adapt to emerging emergency situations.

First claim

The invention claimed is:

1. A system for communicating traffic signal information to a vehicle comprising:
a first dedicated controller, operatively connected to a first memory and a first traffic control device;
a user device, operatively connected to a second memory, and in network communication with the first dedicated controller;
a set of instructions, resident in at least one of the first memory and the second memory, that when executed cause the system to:
determine a user device location;
determine a user device route;
determine a first dedicated controller location on the user device route;
derive a set of user device travel information;
determine a phase plan for the first traffic control device based on the set of user device travel information;
execute the phase plan, thereby altering a performance of the first traffic control device;
derive a first traffic control device operation schedule based on the phase plan;
calculate a user device speed based on the first traffic control device operation schedule; and,
display the user device speed on the user device.

2. The system of claim 1 wherein the set of user device travel information further comprises:
a user device travel direction, a set of user device estimated time of arrival at the first dedicated controller, an intersection location on the user device route.

3. The system of claim 1 wherein the phase plan for the first traffic control device further comprises:
a sequence of phase groups and a green light duration.

4. The system of claim 3 wherein the user device speed further comprises:
a speed, to travel a distance between the user device location and the first dedicated controller location, on the user device route, to reach the first dedicated controller location during the green light duration.

5. The system of claim 1 further comprising:
a second dedicated controller, operatively connected to a third memory and a second traffic control device, and in network communication with the first dedicated controller;
wherein the set of instructions are resident in at least one of the first memory, the second memory and the third memory;
wherein determining a phase plan further comprises:
sending a collaboration signal from the first dedicated controller to the second dedicated controller;
calculating an agreement parameter based on the collaboration signal; and,
executing the phase plan based on the agreement parameter.

6. The system of claim 5 wherein the collaboration signal further comprises at least one of a phase status, a first number of vehicles arriving at the first dedicated controller, a first set of arrival times for the first number of vehicles, a second number of vehicles arriving at the second dedicated controller, and a second set of arrival times for the second number of vehicles.

7. The system of claim 5 wherein the agreement parameter further comprises at least one of a sequence of phase groups and green light durations, a split value, and an offset value.

8. A system for communicating traffic signal information to a vehicle comprising:
a set of dedicated controllers, operatively connected to a first set of memories and a set of traffic control devices;
a user device, operatively connected to a second set of memories, and in network communication with the set of dedicated controllers;
a set of instructions, resident in the first set of memories and the second set of memories, that when executed cause the system to:
determine a location of the user device;
determine a user device route;
determine a first location of a first dedicated controller of the set of dedicated controllers on the user device route;
determine a second location of a second dedicated controller of the set of dedicated controllers on the user device route;
derive a set of user device travel information;
determine an agreed phase plan for a first traffic control device of the set of traffic control devices and a second traffic control device of the set of traffic control devices based on the set of user device travel information;
derive a first traffic control device operation schedule based on the agreed phase plan;
derive a second traffic control device operation schedule based on the agreed phase plan;
execute the agreed phase plan, thereby altering a performance of the first traffic control device and the second traffic control device;
calculate a user device speed based on the first traffic control device operation schedule; and,
display the user device speed on the user device.

9. The system of claim 8 wherein determining the agreed phase plan further comprises:
sending a first set of traffic information from the first dedicated controller to the second dedicated controller;
sending a second set of traffic information from the second dedicated controller to the first dedicated controller;
deriving a set of phase plans based on the first set of traffic information and the second set of traffic information; and,
determining an optimal phase plan from the set of phase plans.

10. The system of claim 9 wherein the first set of traffic information and the second set of traffic information further comprises:
a set of traffic control phases;
a set of light duration timing constraints;
a value for detected vehicles; and,
a value for anticipated vehicles.

11. The system of claim 10 wherein each phase plan of the set of phase plans further comprises an offset value and a split value, and wherein determining the optimal phase plan further comprises:
calculating a delay value for each phase plan of the set of phase plans using the offset value and the split value to derive a set of delay values; and,
determining a minimum delay value of the set of delay values.

12. The system of claim 11 wherein generating the agreed phase plan further comprises:
receiving a set of sensor readings from the first traffic control device; and,
calculating a traffic congestion value.

13. The system of claim 8 wherein determining an agreed phase plan further comprises:
generating, by the first dedicated controller, a proposed phase plan;
sending a request for a set of evaluations of the proposed phase plan to each dedicated controller of the set of dedicated controllers;
calculating a level of agreement based on the set of evaluations; and,
if the level of agreement is greater than a predetermined agreement parameter;
adopting the proposed phase plan as the agreed phase plan.

14. A method for communicating traffic signal information to a vehicle comprising:
providing a first dedicated controller, operatively connected to a first memory and a first traffic control device;
providing a user device, operatively connected to a second memory, and in network communication with the first dedicated controller;
providing a set of instructions, resident in at least one of the first memory and the second memory, that when executed:
determine a user device location;
determine a user device route;
determine a first dedicated controller location on the user device route;
derive a set of user device travel information;
determine a phase plan for the first traffic control device based on the set of user device travel information;
execute the phase plan, thereby altering a performance of the first traffic control device;
derive a first traffic control device operation schedule based on the phase plan;
calculate a user device speed based on the first traffic control device operation schedule; and,
display the user device speed on the user device.

15. The method of claim 14 further comprising p

Assignees

• Univ Texas

Inventors

• Zalila-Wenkstern Rym
• Torabi Behnam

Classifications

• G08G1/082 Primary

  Controlling the time between beginning of the same phase of a cycle at adjacent intersections · CPC title

• G08G1/08

  according to detected number or speed of vehicles · CPC title

• G08G1/083

  Controlling the allocation of time between phases of a cycle · CPC title

• G08G1/087

  Override of traffic control, e.g. by signal transmitted by an emergency vehicle · CPC title

• G08G1/095

  Traffic lights · CPC title