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Adaptive traffic control using vehicle trajectory data

A technology of traffic control and vehicle trajectory, which is applied to the traffic control system of road vehicles, traffic control system, and control traffic signals, etc., and can solve the problem of expensive control.

Active Publication Date: 2020-05-19
BEIJING DIDI INFINITY TECH & DEV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Human tasks are performed as part of existing traffic control, making control unavoidably expensive

Method used

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  • Adaptive traffic control using vehicle trajectory data
  • Adaptive traffic control using vehicle trajectory data
  • Adaptive traffic control using vehicle trajectory data

Examples

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Embodiment Construction

[0017] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0018] Crowdsourced vehicle trajectory data can provide a low-cost, continuous, and reliable data source for traffic signal control. Embodiments of the present application provide an adaptive traffic signal control system based on trajectory data to periodically (e.g., every few days) optimize the time of day (TOD) table, cycle length, phase difference, and real-time ( For example, optimize the green signal ratio in seconds or minutes). The disclosed system consists of four main parts: data acquisition, traffic diagnosis, traffic control scheme optimization, and performance evaluation. Real-time trajectory data is received from the vehicle, and traffic control data (eg, signal parameters) is received from the connected s...

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Abstract

The embodiment of the invention provides a traffic control system and method. The traffic control system may include a communication interface (310) configured to receive vehicle trajectory data (302)acquired by a sensor and traffic control data (304) from a traffic signal controller (106). The traffic control system may also include at least one processor (320). The at least one processor (320)may be configured to detect an abnormal traffic condition. The at least one processor (320) may be further configured to optimize an online traffic control scheme by adjusting a green signal ratio ofthe at least two phases based on the vehicle trajectory data (302). The at least one processor may also be configured to provide the optimized online traffic control scheme to a traffic signal controller (106) in real time to generate a traffic control signal.

Description

technical field [0001] The present application relates to traffic control, and more particularly, to systems and methods for adaptive traffic control using vehicle trajectory data. Background technique [0002] Traffic lights control the timing of traffic flow in all directions. When the traffic light in one direction of traffic flow is green, that is, when southbound traffic turns left, vehicles in other directions stop. The length of the green light (called the green-to-signal ratio) determines how long the traffic queue will accumulate in each direction of the stop. Therefore, it is necessary to control the phase and length of the green light according to the traffic conditions in each direction. [0003] Existing traffic light control is usually performed at each traffic light by a respective controller. Consequently, traffic lights do not coordinate with nearby traffic lights to control traffic flow in large areas. Furthermore, existing traffic light controls rely o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/08
CPCG08G1/08G08G1/0112G08G1/0133G08G1/0145G08G1/082G08G1/083G08G1/0129G08G1/095
Inventor 郑剑峰刘向宏
Owner BEIJING DIDI INFINITY TECH & DEV
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