Intersection saturation flow rate calculation method based on checkpoint data

Abstract

The invention provides an intersection saturation flow rate calculation method based on checkpoint data, which comprises the following steps: carrying out time headway calculation on acquired intersection checkpoint data, and carrying out period division on an obtained time headway sequence; preprocessing the time headway data of the single cycle; calculating the saturated time headway of the peak period according to a normal model test algorithm to obtain the saturation flow rate of the intersection. According to the method, the calculation accuracy is improved, and the requirement of dynamically extracting the saturation flow rate is met.

Description

technical field [0001] The invention relates to the technical field of traffic control, in particular to a calculation method for intersection saturation flow rate based on checkpoint data. Background technique [0002] In recent years, with the rapid development of the national economy, the number of automobiles has continued to increase, which has brought enormous pressure to the normal operation of the urban transportation system. At the same time, people have higher and higher requirements for the reliability and controllability of the transportation system. Urban road intersections are the throats of road traffic, and their traffic capacity directly affects the carrying capacity of the entire traffic network. Due to the mutual interference of motor vehicles, non-motor vehicles and pedestrians in different directions, problems such as congestion are prone to occur at intersections. The cost of adjustment through traffic organization methods such as sign setting and road...

AI Technical Summary

Problems solved by technology

At present, the saturated headway is measured by the time difference between the two vehicles before and after reaching the stop line. In order to avoid the start-up delay at the beginning of the green light, the headway is calculated from the fourth car until the car stops behind the stop line when the green light is on. For the last car, take the reciprocal of the average value of the saturated headway and multiply it by 3600 as the saturated flow rate, but the saturated flow rate obtained by this method cannot meet the requirements for the accuracy of the saturated flow rate, because there are differences in practical applications Effects of vehicle type and headway of unsaturated traffic flow state on measured saturated headway

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