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Traffic conflict simulation two-stage parameter calibrating method

A parameter calibration and traffic conflict technology, applied in the field of traffic simulation, can solve the problems that cannot correctly reflect the actual traffic conflict situation

Active Publication Date: 2012-06-27
SOUTHEAST UNIV
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Problems solved by technology

However, the engineering practice in traffic conflict simulation shows that the traditional parameter calibration process for traffic capacity research has great defects in simulating actual traffic conflicts, and cannot correctly reflect the actual traffic conflict conditions.

Method used

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Embodiment Construction

[0018] The steps of the traffic conflict simulation two-stage parameter calibration method of the present invention include:

[0019] 1. Establish the intersection VISSIM simulation model:

[0020] The first step is to construct the intersection model. Micro-traffic simulation software VISSIM is a simulation software widely used in the field of micro-traffic simulation. To build an intersection simulation model, you first need to collect on-site data of the intersection, including geometric dimensions of the intersection, traffic flow, ratio of large and small vehicles, and traffic signal timing. and other information. Then establish a simulated intersection based on the aerial photograph or CAD drawing of the intersection, and define the traffic flow, the ratio of large and small vehicles, vehicle speed, and traffic signal timing in the simulation model based on the actual observation data.

[0021] Step 2, parameter calibration. VISSIM defines the running behavior of the ...

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Abstract

The invention discloses a traffic conflict simulation two-stage parameter calibrating method, which comprises the following steps of: calibrating parameters in traffic simulation software (VISSIM) influencing traffic running at a first stage; and calibrating a simulation conflict decision threshold value in conflict analysis software (SSAM) at a second stage. On the basis of the conventional traffic simulation model parameter calibrating method, the two-stage parameter calibrating method oriented to traffic conflict simulation is provided, so that the defect of low conflict simulation accuracy existing in the conventional parameter calibrating method is overcome; and the method has practical engineering use value on the aspect of safety research of a traffic design scheme by using microscopic simulation software.

Description

technical field [0001] The invention belongs to the field of traffic simulation, and relates to a method for calibrating parameters of traffic conflict simulation by using microcosmic simulation software VISSIM and conflict analysis software SSAM. Background technique [0002] The continuous maturity of microscopic simulation technology makes it widely used in the field of traffic engineering, especially in the research of traffic capacity, and gradually forms a parameter calibration process that uses microscopic simulation technology to simulate actual traffic operation conditions. However, engineering practice in traffic conflict simulation shows that the traditional capacity-oriented parameter calibration process has great defects in simulating actual traffic conflicts, and cannot correctly reflect the actual traffic conflict conditions. Contents of the invention [0003] How to improve the calibration process of the traditional micro-traffic simulation model so that it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 刘攀黄飞王炜黄佳张序万晶晶
Owner SOUTHEAST UNIV
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