Single-intersection signal timing optimization method based on trajectory data

A signal timing and trajectory data technology, which is applied in the traffic control system of road vehicles, traffic flow detection, traffic control system, etc., can solve problems that have not been studied by anyone, and achieve easy access, reduce intersection delays, and require computing power small effect

Inactive Publication Date: 2020-10-30
NANJING UNIV OF SCI & TECH
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However, the direct application of trajectory data to

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  • Single-intersection signal timing optimization method based on trajectory data
  • Single-intersection signal timing optimization method based on trajectory data
  • Single-intersection signal timing optimization method based on trajectory data

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[0051] In order to make the purpose, technical solutions, and advantages of this application clearer, the following further describes the application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the application, and not used to limit the application.

[0052] In one embodiment, combining figure 1 , Provides a method for optimizing signal timing for a single intersection based on trajectory data. The method includes the following steps:

[0053] Step 1. Obtain the original signal timing information of the intersection to be optimized for signal timing;

[0054] Here, the original signal timing information includes intersection signal cycle, phase sequence, duration of each phase, and phase start time. The phase start time refers to the start time of the traffic light cycle at the intersection.

[0055] Step 2: Obtain historical trajectory data information of floatin...

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Abstract

The invention discloses a single-intersection signal timing optimization method based on trajectory data. The method comprises the following steps of: acquiring original signal timing information of an intersection; acquiring historical trajectory data of floating vehicles in the same time period on a road section associated with the intersection, and solving queuing positions of the floating vehicles in each period; predicting the queuing length in each phase of the period of the intersection according to a Bayesian model and a probability distribution theory; and calculating the optimal timing duration of each phase on the basis of a starting wave theory. According to the method, the actual situation that the permeability of current road network floating vehicles is low is comprehensively considered, and different methods are adopted to calculate traffic scenes with different permeability. According to the method of the invention, the intersection queuing length estimation method iscombined with the traffic wave theory to carry out timing on the intersection; the massive trajectory data are fully utilized; the advantages of statistics and traffic wave theory are fully combined;the intersection signal timing method based on the trajectory data is established; the utilization rate of green light duration of each phase is improved; and the delay of the intersection is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of traffic control, in particular to a single intersection signal timing optimization method based on track data. Background technique [0002] The rapid development of traffic theory and Internet technology provides diverse and large-scale traffic data resources for traffic research and urban traffic management. Electronic police data, bayonet data, and coil data have disadvantages such as difficulty in laying, high maintenance costs, and missing data. With the rise of online taxis, massive trajectory data has been collected. Trajectory data is also highly respected in the research field due to its high precision and large sample size. [0003] In the current existing research, trajectory data are mostly used to estimate traffic parameters, such as traffic flow, queue length, intersection delay and travel time, etc. In the paper "Queue length estimation from probe vehicle location and the impacts of sampl...

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Application Information

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IPC IPC(8): G08G1/01G08G1/081
CPCG08G1/0112G08G1/0129G08G1/0137G08G1/081
Inventor 张伟斌白孜帅
Owner NANJING UNIV OF SCI & TECH
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