Dynamic weight-based expressway traffic operation state fuzzy comprehensive evaluation method
A technology of traffic operation status and fuzzy comprehensive evaluation, which is applied in the traffic control system of road vehicles, traffic flow detection, traffic control system, etc., and can solve the problems of different importance and great influence.
Active Publication Date: 2017-01-04
重庆大学溧阳智慧城市研究院
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However, in the evaluation process, the weight of each evaluation index is obtained by expert method, which is greatly affected by subjective factors, and different expressway sections and the same section at different times due to the dynamic changes of traffic data, the index has a great influence on the expressway section. The importance of health status reflection may vary
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[0071] The present invention will be further described below in conjunction with drawings and embodiments.
[0072] As shown in the figure, the fuzzy comprehensive evaluation method provided in this embodiment evaluates the traffic operation state of the expressway section, specifically through the following steps:
[0073] Step 1: Data Preprocessing
[0074] (1) First, use the threshold method to eliminate the abnormal data, and preprocess the data of the vehicle detector:
[0075] The reasonable range of flow threshold q is:
[0076] 0≤q≤f c CT / 60
[0077] Among them: C is the road capacity (veh / h); T is the time interval of data collection (min); f c It is the correction coefficient of the flow rate, usually 1.1-1.3.
[0078] The reasonable range of velocity v is: 0≤v≤f v v 0
[0079] where: v 0 is the speed limit of the high-speed road section, and the speed limit of different road sections is different, which is determined by the road section itself; f v It is t...
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The invention discloses a dynamic weight-based expressway traffic operation state fuzzy comprehensive evaluation method. Firstly, according to acquired vehicle detector data and charging data, an evaluation index value is calculated; then, according to dynamic traffic operation data, an index weight vector is calculated; finally, according to the weight vector, a dynamic fuzzy comprehensive evaluation model is built, and a comprehensive evaluation value for the expressway traffic operation state is calculated; and the expressway traffic operation state is evaluated and the evaluation result is outputted. According to the dynamic weight-based expressway traffic operation state fuzzy comprehensive evaluation method provided by the invention, based on the existing expressway data source, the dynamic traffic data are used for calculating the index weight in real time, the fuzzy comprehensive evaluation method is adopted to evaluate the traffic operation state of the expressway section, the method adopts four parameters such as the section saturation, the occupancy, the average travel speed and the average travel time delay for carrying out index evaluation on the expressway section, and fuzzy comprehensive evaluation is realized through the dynamic weight.
Description
technical field [0001] The invention relates to the field of expressway traffic operation evaluation, in particular to a dynamic weight-based fuzzy comprehensive evaluation method for expressway traffic operation state. Background technique [0002] The evaluation system of expressway traffic operation status can provide theoretical support for expressway control measures and operation strategies. In order to better propose expressway management strategies, improve operational efficiency, and maximize the role of expressways, it is necessary to evaluate the expressway traffic operation at different times in order to identify the period with the best operating conditions and use it as a future reference standards for practice [0003] At present, the fuzzy comprehensive evaluation method is a common method in expressway operation evaluation. This method mainly selects one or more traffic indicators for traffic evaluation, and evaluates the expressway operation status qualita...
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IPC IPC(8): G08G1/01
CPCG08G1/0125G08G1/0133
Inventor 孙棣华刘卫宁赵敏郑林江曾智慧
Owner 重庆大学溧阳智慧城市研究院