Method capable of determining influence scope of highway emergent traffic incident

Abstract

A method capable of determining the influence scope of a highway emergent traffic incident aims to determine the influence scope of a traffic incident after an emergent traffic incident occurs on the basic section of a highway of which the entry and exit are fully controlled. The following steps adopted by the invention is that the traffic quantity and density of the upstream lane and an incident point are obtained based on detectors; the flow wave speed and influence length can be calculated based on a shock wave theory; whether the influence length is longer than the that from the incident point to the current upstream passage ramp is judged; and the influence scope of the emergent traffic incident is determined. The method provided by the invention can accurately project the influence scope of the emergent traffic incident in a real-time manner, so as to improve the implementation efficiency of measures for quickly dealing with the emergent traffic incident.

Description

technical field [0001] The invention relates to calculating the impact length and determining the impact range of the sudden traffic event according to the fixed detectors arranged on the road section and the detection data after the sudden traffic incident occurs on the expressway, which is a measure for the treatment of the sudden traffic incident and the traffic disposal measures provide a basis for implementation. The utility model belongs to the field of expressway traffic control. Background technique [0002] Expressway sudden traffic incidents and the resulting traffic congestion have become problems that cannot be ignored in the operation of the traffic system. Due to the small number of entrances and exits, separate driving and fully enclosed features of the expressway, once an unexpected traffic incident occurs, it will be difficult for other vehicles to turn around, divert and evacuate if they continue to drive in, which will easily cause congestion, resulting i...

AI Technical Summary

Problems solved by technology

The queuing theory model is easy to calculate and operate, but it cannot reflect the change of traffic flow well; the traffic flow fluctuation theory model can effectively calculate the queue length when the mobile queue is close to the bottleneck, which is helpful to better understand the congestion state, but ignores The impact of the difference between the large vehicle rate and the actual arrival flow rate on the shock wave velocity, there is a certain gap with the actual situation, and the lack of pertinence

In addition, research results in recent years have shown that traffic simulation is an effective tool for analyzing traffic flow characteristics in expressway emergencies, but microscopic methods generally use complex parameter calibration to make the model as close as possible to the actual situation, and the modeling time is long, which is not suitable for engineering application

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