Real-time estimating and preventing method for rear-end collision accident risk at tail of expressway queue

Abstract

The invention discloses a real-time estimating and preventing method for a rear-end collision accident risk at the tail of an expressway queue. A traffic flow detector is arranged in an upstream section of a bottleneck and used for acquiring data, an oblique cumulative occupancy curve is adopted for accurately positioning the tail of a jam queue, a time distance TP and a space distance SP between driving vehicles and the queue tail are calculated respectively, a united normal distribution model of the accident occurrence probability is created based on real data so as to predict the rear-end collision accident risk at the tail of a vehicle queue; and a roadside notice board is reasonably arranged at the upstream of the bottleneck section, so that vehicle drivers have enough distances to decelerate and regulate after seeing an alarming notice on the roadside notice board. Compared with the conventional estimating and controlling method for rear-end collision accidents at the queue tail, the real-time estimating and preventing method for the rear-end collision accident risk at the tail of the expressway queue is in accordance with the practical traffic flow running state more accurately and more scrupulously, and has great importance in traffic safety in the expressway jam queue section.

Description

technical field [0001] The invention belongs to the technical field of traffic safety and intelligent transportation. Aiming at the phenomenon of frequent rear-end collision accidents at the tail of express road congestion queues, based on the spatio-temporal distribution characteristics of rear-end collision accidents at congestion queues, a real-time risk prediction method for rear-end collision accidents at express road queues is proposed. Background technique [0002] In recent years, with the rapid growth of motor vehicle ownership and utilization rate in my country, traffic jams often occur on expressways, and the traffic safety situation is becoming increasingly severe. There are often several traffic bottlenecks on the expressway section, and traffic jams often occur near the bottleneck, and the queuing status of vehicles will spread to the upstream section. At this time, when the upstream normal driving vehicle reaches the end of the spreading congestion queue, the ...

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Problems solved by technology

[0004] Technical problem to be solved: Aiming at the deficiencies in the prior art, the present invention proposes a real-time prediction method for the risk of rear-end collision accidents on express roads, which solves the problem that there is no queuing in the calculation method for the accident probability of express road congestion and queuing tails in the prior art. Accurate estimation of the propagation position of the tail, and the lack of analysis of the relationship between rear-end collision accidents and the space and time distance at the tail of the queuing, and the accident risk, so that it is impossible to accurately predict the probability of accidents at the tail of the expressway congestion queuing

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