A basic section method of the ring road for the investigation of motor vehicle traffic flow at the four-way roundabout

Abstract

The invention discloses a rotary road basic section method for four-road rotary intersection motor vehicle traffic flow direction surveying. The rotary road basic section method includes the steps of building inlet-rotary-road vehicle observation sections at the stopping positions of motor vehicle inlet roads, building inner-rotary-road vehicle observation sections in the middles of rotary road basic sections, and building right turning vehicle observation sections at the starting positions of motor vehicle outlet roads on the outermost sides; starting to collect data through the observation sections at the same time, wherein the stopping moments of data collecting of the inner-rotary-road vehicle observation sections are later than the stopping moments of the other observation sections; within a special time, collecting types and license plate number characters of vehicles through the inlet-rotary-road vehicle observation sections and the inner-rotary-road vehicle observation sections so that invalid data collected through the inner-rotary-road vehicle observation sections can be conveniently removed, and within other time, collecting types and numbers of vehicles through the observation sections; as for each type of vehicles, building the numerical relations between motor vehicle traffic flow direction data of the inlet-rotary-road vehicle observation sections and the numbers of the vehicles passing through the related observation sections. The rotary road basic section method has the advantages of being low in working strength and high in surveying accuracy.

Description

technical field [0001] The invention belongs to the technical field of traffic engineering, and relates to a motor vehicle traffic flow investigation method, in particular to a ring road basic section method for investigating the motor vehicle traffic flow at a four-way roundabout intersection. Background technique [0002] The symbols involved in the following text are explained as follows: [0003] [0004] [0005] The investigation of motor vehicle traffic flow at level intersections is a basic work in the field of traffic engineering technology. The downstream position of the line is used as the observation section, and the data is collected by manual counting. [0006] At level intersections, use the guide arrows to indicate the prescribed driving direction of the motor vehicle lane ahead. When a motor vehicle passes through a level intersection, it will go through three operating stages: (1) select and drive into the entrance lane; (2) run inside the intersect...

AI Technical Summary

Problems solved by technology

[0020] 1. With the increase of the number of vehicles entering the ring, the vehicle trajectory in the interweaving section of the ring road will become very complicated, and data miscollection and missing data often occur, seriously affecting the accuracy of the survey results;

[0021] 2. Since the vehicle observation section in the ring starts and ends data collection at the same time as other observation sections, the original data collected by the vehicle observation section in the ring probably includes the data of the vehicles that passed through the vehicle observation section before the data collection started. Does not include the data of vehicles passing through the vehicle observation section before the end of data collection, which will have a negative impact on the accuracy of the survey results

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