A vehicle queuing overflow prediction method for urban bottleneck sections

Abstract

The invention discloses a vehicle queuing overflow anticipation method for a city bottleneck road section, and is used for judging whether the road section suffers from or is about to suffer from vehicle queuing overflow. The vehicle queuing overflow anticipation method for the city bottleneck road section mainly comprises two parts of a maximum generalized queuing length determination method and a vehicle queuing overflow anticipation method. Firstly, the allowable vehicle queuing length value, i.e. the overflow safe distance, of the bottleneck road section is determined; then, a traffic shock wave model is combined to calculate the wave velocity of the queuing accumulation shock wave and the queuing dissipation shock wave; the layout position of a shock wave detector is determined; finally, according to the layout position of the detector, the maximum generalized queuing length is calculated; if the maximum generalized queuing length is larger than the overflow safe distance, the vehicle queuing overflow phenomenon is judged to happen or to be about to happen. According to the vehicle queuing overflow anticipation method for the bottleneck road section, which is provided by the invention, the premise and the quality guarantee are provided for judging whether the intersection bottleneck road section vehicle queuing overflow control is implemented in time.

Description

technical field [0001] The invention belongs to the field of road traffic control, and in particular relates to a method for determining the maximum generalized vehicle queuing length and predicting the vehicle queuing overflow for urban bottleneck sections. Background technique [0002] With the rapid development of social economy, the continuous growth of population and the gradual improvement of people's living standards, the number of motor vehicles in my country is also increasing at an unprecedented rate. The huge number of motor vehicles makes urban roads and transportation facilities overwhelmed. Local or even large-scale traffic jams often occur. From the perspective of the space where traffic congestion occurs, urban road traffic congestion often starts from a certain intersection in the road network. The queuing tends to spread further upstream and even extend to the upstream intersection, and vehicle queuing overflow may occur. Existing studies mostly use the ov...

AI Technical Summary

Problems solved by technology

However, the appropriate overflow safety distance is often affected by parameter values ​​such as the length of the bottleneck road section and the arrival strength of upstream vehicles on the road section. The overflow safety distance required under different roads and traffic conditions is often not uniquely determined.

However, in practical applications, the queue overflow detector cannot and cannot meet the dynamic layout requirements of the overflow safety distance

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