Method for measuring and calculating queuing length caused by traffic accidents on urban road based on fixed detectors
A fixed detector and queuing length technology, which is applied in the traffic control system of road vehicles, traffic flow detection, traffic control system, etc., can solve the problems of accurate calculation, ineffective application of urban roads, complex traffic flow forms, etc., to avoid The effect of blind adoption
Active Publication Date: 2013-01-30
海安江理工技术转移中心有限公司 +1
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Problems solved by technology
Some studies have been carried out on the impact of traffic accidents at home and abroad, but there are some deficiencies in the existing studies, which prevent them from being effectively applied to urban roads, especially the accurate calculation of the length of queues in congestion, mainly as follows: (1) For urban roads Most of the studies on the diffusion mechanism of traffic accidents on roads are based on related theories of road traffic. However, urban road traffic is mostly controlled by signals, and its traffic flow form is relatively complicated. It cannot be analyzed simply as a continuous flow. It is necessary to introduce a new arrival flow model for accurate analysis. Calculate the queue length; (2) It is generally believed that after the traffic accident is resolved, the departure rate of vehicles is equal to the maximum capacity of the road, but this is not the case
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[0021] The urban road traffic accident queuing length measurement method based on fixed detector that the present invention proposes is:
[0022] 1) Use the combined traffic flow of urban roads to describe the characteristics of vehicle arrival, and calculate the vehicle arrival rate,
[0023] 2) Utilize the fixed detector arranged on the road section to detect the leaving rate of the vehicle,
[0024] 3) According to the arrival rate and departure rate of vehicles, establish a queue length measurement method based on a fixed detector,
[0025] 4) According to the duration of the traffic accident, determine the maximum queue length caused by the traffic accident.
[0026] Based on the above basic ideas, a specific calculation method for the queue length of urban road traffic accidents based on fixed detectors is proposed:
[0027] 1. Calculation method of vehicle arrival rate:
[0028] Assume: the urban road network is completely composed of signal-controlled intersections,...
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The invention discloses a method for measuring and calculating the queuing length caused by traffic accidents on the urban road based on fixed detectors and relates to a method for calculating the queuing length caused by the traffic accidents according to the fixed detectors arranged on road sections after the traffic accidents on the urban road occur. The method comprises the following steps of: calculating the arrival rate of vehicles on an entrance way at a crossed port; detecting the leaving rate of the vehicle at the crossed port; calculating the queuing length based on the fixed detector; and finally determining the maximum queuing length. By using the invention, the aim for quickly and accurately obtaining the queuing length for jam caused by the traffic accidents on the urban road can be achieved. The method has high accuracy and is simple and practical.
Description
technical field [0001] The invention relates to a calculation method for determining the queue length of congestion caused by traffic accidents based on fixed detectors arranged on road sections after traffic accidents occur on urban roads, and provides theoretical basis for handling traffic accidents and implementing traffic disposal measures. The utility model belongs to the field of urban road traffic control. Background technique [0002] Frequent traffic accidents on urban roads will not only cause casualties and property losses, but also cause traffic congestion, reduce the operating efficiency of the road network, and even induce secondary accidents. An effective way to reduce the negative impact of traffic accidents is to calculate the impact of accidents in real time and take targeted measures to deal with traffic accidents in a timely manner. Some studies have been carried out on the impact of traffic accidents at home and abroad, but there are some deficiencies i...
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IPC IPC(8): G08G1/01G08G1/065
Inventor 陆建姜军李文华程灿
Owner 海安江理工技术转移中心有限公司