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Simulation model calibration method based on traffic conflict extremum distribution

A technology of traffic conflict and extreme value distribution, which is applied in traffic flow detection, traffic control system, traffic control system of road vehicles, etc., can solve problems such as traffic safety evaluation error and evaluation result error, so as to improve simulation results and reduce subjective Awareness influence, the effect of accurate and reliable traffic safety evaluation results

Active Publication Date: 2021-03-30
SOUTHEAST UNIV
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Problems solved by technology

Existing traffic simulation conflicts generally use the default simulation model parameters, but the simulation results deviate greatly from the measured results, which will lead to large errors in traffic safety evaluation, and even lead to errors in evaluation results

Method used

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  • Simulation model calibration method based on traffic conflict extremum distribution
  • Simulation model calibration method based on traffic conflict extremum distribution
  • Simulation model calibration method based on traffic conflict extremum distribution

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Embodiment Construction

[0020] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] The simulation model calibration method based on traffic conflict extreme value distribution of the present invention comprises the following steps:

[0022] Step 1. Traffic data collection, video cameras are used to record at signalized intersections. Through the recorded video, the hourly traffic volume Q, average speed V, vehicle flow path L, signal timing W, and the time period in units of 5 minutes are analyzed. The traffic conflicts and the collision time TTC of each traffic conflict are collected for data collection.

[0023] Step 2. Fitting the extreme value distribution of the measured traffic conflicts, using the following formula to fit the extreme value distribution of the measured traffic conflicts in the 5-minute time period:

[0024]

[0025] Where y represents the opposite number of collision time co...

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Abstract

The invention discloses a simulation model calibration method based on traffic conflict extremum distribution. The method comprises the following steps: (1) carrying out traffic conflict data acquisition; (2) actually measured traffic conflict extremum distribution fitting; (3) building a traffic simulation model; and (4) calibrating the traffic simulation model. The method comprises the steps offirstly collecting actual traffic conflict data, then fitting traffic conflict extremum distribution, then building a traffic simulation model, and finally calibrating the simulation model based on the method provided by the invention. The method can improve the precision of a traffic simulation model, and has an actual engineering application value in traffic safety evaluation.

Description

technical field [0001] The invention relates to the technical fields of traffic safety and traffic simulation, in particular to a simulation model calibration method based on traffic conflict extreme value distribution. Background technique [0002] The high frequency of traffic conflicts plays an important role in the evaluation of road traffic safety. However, the main means of observing traffic conflicts is manual observation, which has high costs, low repeatability, and the judgment of traffic conflicts is subjective, so there are inevitable defects. Especially when evaluating the traffic design scheme, because the scheme is in the design stage and has not been implemented, it is impossible to use manual observation methods to collect traffic conflict data, and the traffic simulation method can provide a simulated traffic conflict for traffic safety evaluation. Existing traffic simulation conflicts generally use the default simulation model parameters, but the simulatio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06G08G1/01G08G1/017
CPCG06Q10/067G06Q50/06G08G1/0125G08G1/0175
Inventor 郭延永刘攀吴瑶丁红亮欧阳鹏瑛
Owner SOUTHEAST UNIV
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