Method for correcting traffic capacity of left-turn motor vehicle

Abstract

The invention aims to propose a method for correcting the traffic capacity of left-turn motor vehicles considering the influence of the expansion of the left-turn bicycle traffic flow at an intersection. Phenomena of the expansion of the left-turn bicycle traffic flow at the intersection are analyzed. Three variables, namely the arrival rate of traditional bicycles, the arrival rate of electric bicycles and the direction coefficient of left-turn bicycles in the left-turn phase red light time are used to make regression predictions of the expansion extent of the left-turn bicycle traffic flow.An influence model of the expansion extent of the left-turn bicycle traffic flow on the left-turn motor vehicle form delay is established. A correction model of the traffic capacity of left-turn motorvehicles at different intersection roads and traffic conditions is proposed. According to the application, the method is accurate for calculating the traffic capacity of left-turn vehicles, is conducive to the improvement of the traffic flow operating efficiency at signalized intersections in cities in China, and is of great significance for the rational evaluation of intersection construction benefits, allocation of space-time resources at intersections, and alleviation of urban traffic congestion.

Description

technical field [0001] The invention belongs to the technical field of traffic flow characteristics research and traffic management and control, and specifically aims at the phenomenon of left-turning bicycle traffic flow expansion at intersections, selects effective explanatory variables, performs regression prediction on the left-turning bicycle traffic flow expansion range, and establishes a left-turning bicycle traffic flow expansion phenomenon. The impact model of traffic flow expansion on the formal delay of left-turning motor vehicles is proposed, and the modified model of the traffic capacity of left-turning motor vehicles under different intersection roads and traffic conditions is proposed. Background technique [0002] With the development of society and economy, urban problems caused by motorization have aroused people's second attention to green transportation represented by bicycles. In western developed countries, the number of leisure and commuting trips by b...

AI Technical Summary

Problems solved by technology

Under the traditional four-phase signal timing scheme, the non-left-turning vehicle fleet passes the intersection in the same left-turning phase. In order to avoid collisions and accidents, the left-turning motor vehicles affected by the expansion phenomenon of bicycles traveling in the same direction have to slow down Driving or changing the driving trajectory, resulting in the reduction of the traffic capacity of left-turning motor vehicles in the intersection and the increase of driving delays

[0004] At present, the delay and capacity of left-turning motor vehicles are only revised and estimated based on the existing correction coefficients in the HCM manual, without considering the impact of traffic flow expansion of left-turning bicycles. There is a large deviation

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