A construction method of traffic safety risk field based on wim data
A traffic safety and risk technology, applied in the direction of road vehicle traffic control system, traffic flow detection, traffic control system, etc., can solve the problem that the parameter error is only ±3%
Active Publication Date: 2021-05-11
TONGJI UNIV
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Problems solved by technology
The Weigh-In-Motion (WIM) system, which has been widely used in recent years, can accurately measure vehicle information including its vehicle weight, axle load, vehicle length, wheelbase, vehicle speed, etc., as well as vehicle time distance, traffic flow, vehicle Car-following and other load characteristics and traffic flow information, the current WIM equipment under different road conditions and driving conditions, the parameter error of the test is only ±3%
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[0045] like figure 1 As shown, the present embodiment proposes a method for constructing a traffic safety risk field based on WIM data, which specifically includes the following steps:
[0046] 1) Based on the measured WIM data, analyze the traffic flow rules and traffic behavior of vehicles with different axles, and construct a traffic simulation model of cellular automaton considering the load characteristics, which specifically includes the following steps:
[0047] 11) Divide vehicle types by axle type, and use measured WIM data to analyze the spatio-temporal law and traffic behavior of axle-type vehicle traffic flow elements (including vehicle speed, traffic volume, and traffic composition);
[0048] 22) Using the traffic operation rules of axle-type vehicles determined by the measured WIM data, combined with the car-following and lane-changing characteristics, a cellular automata simulation model for the research road object is established.
[0049] 2) In order to analy...
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The invention relates to a method for constructing a traffic safety risk field based on WIM data, comprising: analyzing the traffic flow law and traffic behavior of vehicles with different axles based on the measured WIM data, and constructing a traffic simulation model of cellular automata considering load characteristics; Potential collision energy is an index to measure risk consequences, and a set of traffic safety risk assessment indicators is established; a risk field model in the space-time dimension of traffic safety is established, and finally the traffic safety risk level assessment based on WIM data is realized. Compared with the prior art, the present invention considers the impact of load characteristics on traffic safety, realizes the visualization of traffic risk space-time dimensions, and provides new theories and new methods for traffic safety risk assessment and active safety control; , especially the dynamic assessment and early warning of traffic safety risks of key transportation infrastructure such as bridges and tunnels, which provides a theoretical basis and technical support.
Description
technical field [0001] The invention relates to the field of highway traffic safety risk assessment and management, in particular to a method for constructing a traffic safety risk field based on WIM data. Background technique [0002] With the growth of my country's road transportation demand, the development of expressways is advancing by leaps and bounds. The development of expressways shortens the space-time distance between provinces and cities, speeds up the exchange of people and goods between regions, reduces production and transportation costs, and promotes national economic development and social progress. At the same time, the greater demand for road transportation also makes heavy-load vehicles (such as large and extra-large freight vehicles) gradually occupy a greater share of expressway traffic, which has a certain impact on expressway operation and maintenance and traffic safety. Load characteristics are an important attribute of traffic flow, which not only ...
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IPC IPC(8): G08G1/01G06F30/20
CPCG08G1/0137G06F30/20
Inventor 涂辉招李浩王颖孙立军何青俊
Owner TONGJI UNIV