Road traffic analysis methods and apparatuses

Patent metadata

Field	Value
Publication number	US-12014629-B2
Application number	US-202117646397-A
Country	US
Kind code	B2
Filing date	Dec 29, 2021
Priority date	Feb 15, 2017
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

Embodiments of the present disclosure can provide a road traffic analysis method and an apparatus. The method can comprise obtaining a traffic parameter of a road intersection by analyzing road traffic information of the road intersection, determining a reference adjustment length for each phase of a traffic signal cycle corresponding to each lane of the road intersection based on the road traffic information and the traffic parameter. The traffic signal cycle has one or more phases. The method can also comprise determining a first adjustment length when a difference between the reference adjustment length and the first adjustment length satisfies a condition associated with the lanes of the road intersection and the corresponding traffic parameter, and adjusting the phases of the traffic light cycle at the road intersection based on the first adjustment length for each phase.

First claim

What is claimed is:

1. A road traffic analysis method, comprising:
obtaining a traffic parameter of a road intersection by analyzing road traffic information of the road intersection;
determining a theoretical phase adjustment time for each phase of a traffic signal cycle corresponding to each lane of the road intersection based on the road traffic information and the traffic parameter, wherein the traffic signal cycle has one or more phases;
determining an actual phase adjustment time, based on the theoretical phase adjustment time of each lane of the road intersection, wherein a difference between the theoretical phase adjustment time and the actual phase adjustment time satisfies a condition associated with the lanes of the road intersection and the traffic parameter; and
adjusting the phases of the traffic signal cycle at the road intersection based on the actual phase adjustment time for each phase.

2. The road traffic analysis method according to claim 1 , wherein the theoretical phase adjustment time for each phase of the lane is determined based on a product of a speed difference times a phase adjustment coefficient, the speed difference being a difference between a traffic speed of an upstream road section and a traffic speed of a downstream road section of the lane.

3. The road traffic analysis method according to claim 2 , wherein at least one of obtaining the traffic parameter, determining the theoretical phase adjustment time, or determining the actual phase adjustment time is implemented using a phase adjustment model, and the phase adjustment coefficient is obtained through learning and training with the phase adjustment model.

4. The road traffic analysis method according to claim 1 , wherein a sum of the actual phase adjustment time for each phase for the lane in the traffic signal cycle equals 0.

5. The road traffic analysis method according to claim 1 , wherein adjusting the phases at the road intersection based on the actual phase adjustment time for each phase of the road intersection comprises:
determining a traffic unbalance index of the road intersection based on the road traffic information and the traffic parameter;
in response to a determination that the traffic unbalance index satisfies a traffic unbalance threshold, identifying the road intersection as an unbalanced intersection with unbalanced road traffic; and
in response to the road intersection being identified as the unbalanced intersection, adjusting the phases at the road intersection based on the actual phase adjustment time for each phase of the road intersection.

6. The road traffic analysis method according to claim 1 , wherein the road traffic information comprises at least one of:
a travel speed of a vehicle traveling at the road intersection, time information corresponding to the travel speed, a name of a city to which the road intersection belongs, an identification code of the city, a name of an entrance road section, a name of an exit road section, a name of the road intersection, attributes of the road intersection, a road node identifier in an electronic map, a sheet number of the road node, a sheet number of the entrance road section, a road section identifier of the entrance road section, a sheet number of the exit road section, a road section identifier of the exit road section, a road direction of the entrance road section, a road direction of the exit road section, an entrance angle of the entrance road section, an exit angle of the exit road section, or a geographical area where the road intersection is located.

7. The road traffic analysis method according to claim 1 , wherein the traffic parameter comprises at least one of:
a traffic speed of an upstream road section of each lane in each traffic stream direction at the road intersection, a traffic speed of a downstream road section of each lane in each traffic stream direction at the road intersection, a first time period associated with each travel speed, a vehicle travel direction of the lane, one of a weekday or a weekend corresponding to the first time period, total traffic volume of the lane on all weekdays, or total traffic volume of the lane on all weekends,
wherein the vehicle travel direction comprises turning left, turning right, going straight and turning around.

8. The road traffic analysis method according to claim 1 , wherein a road traffic analysis platform includes a data acquisition interface for acquiring the road traffic information, a road traffic analysis interface for accessing and outputting the actual phase adjustment time for each phase of the road intersection, and a data upload interface for uploading the road traffic information.

9. The road traffic analysis method according to claim 8 , wherein the road traffic information is acquired from at least one of navigation data of the road intersection or road traffic data, the navigation data is acquired from a third-party map service provider through the data acquisition interface, and the road traffic data is received through the data upload interface and uploaded by a traffic data collection device provided at the road intersection.

10. The road traffic analysis method according to claim 9 , wherein the road traffic analysis platform adjusts the phases at the road intersection based on the actual phase adjustment time received from the road traffic analysis interface for each phase at the road intersection, and an interface protocol of traffic signal lights at the road intersection.

11. A road traffic analysis apparatus comprising:
a memory storing a set of instructions; and
one or more processors configured to execute the set of instruction to cause the apparatus to perform:
obtaining a traffic parameter of a road intersection by analyzing road traffic information of the road intersection,
determining a theoretical phase adjustment time for each phase of a traffic signal cycle corresponding to each lane of the road intersection based on the road traffic information and the traffic parameter, wherein the traffic signal cycle has one or more phases,
determining a actual phase adjustment time, based on the theoretical phase adjustment time of each lane of the road intersection, wherein a difference between the theoretical phase adjustment time and the actual phase adjustment time satisfies a condition associated with the lanes of the road intersection and the traffic parameter, and

adjusting the phases of the traffic signal cycle at the road intersection based on the actual phase adjustment time for each phase.

12. The road traffic analysis apparatus according to claim 11 , wherein the theoretical phase adjustment time for each phase of the lane is determined based on a product of a speed difference times a phase adjustment coefficient, the speed difference being a difference between a traffic speed of an upstream road section and a traffic speed of a downstream road section of the lane.

13. The road traffic analysis apparatus according to claim 12 , wherein at least one of obtaining the traffic parameter, determining the theoretical phase adjustment time, or determining the actual phase adjustment time is implemented using a phase adjustment model, and the phase adjustment coefficient is obtained through learning and training with the phase adjustment model.

14. The road traffic analysis apparatus according to claim 11 , wherein a sum of the actual phase adjustment time for each phase for the lane in the traffic signal cycle equals 0.

15. The road traffic analysis apparatus according to claim 11 , wherein adjusting the phases at the road intersection based on the actual phase adju

Assignees

• Alibaba Group Holding Ltd

Inventors

• Min Wanli
• Wang Jiawei
• Wang Zhenggang

Classifications

• G08G1/083

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

• G08G1/08 Primary

  according to detected number or speed of vehicles · CPC title

• G08G1/0125 Primary

  Traffic data processing · CPC title

• G08G1/0133

  for classifying traffic situation · CPC title

• G08G1/0145

  for active traffic flow control · CPC title