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Calculation method of vehicle queuing length in saturated state of signalized intersection

A technology of queuing length and calculation method, which is applied in the field of intelligent transportation, can solve the problems that the queuing length of vehicles cannot be accurately measured, and the vehicle detector cannot measure the arrival rate of vehicles in a timely and accurate manner, so as to meet the requirements of signal timing and traffic management Demand, improvement of detection accuracy and efficiency, good accuracy effect

Active Publication Date: 2015-10-28
JIANGSU R & D CENTER FOR INTERNET OF THINGS
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Problems solved by technology

However, these models require the average arrival rate of vehicles at each entrance to be stable throughout the time period, and it is necessary to measure the vehicle arrival rate in real time and accurately in a period of time. At this time, the vehicle detector cannot accurately measure the vehicle arrival rate in time, so the above model cannot accurately measure the vehicle queue length

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  • Calculation method of vehicle queuing length in saturated state of signalized intersection
  • Calculation method of vehicle queuing length in saturated state of signalized intersection
  • Calculation method of vehicle queuing length in saturated state of signalized intersection

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[0040] The present invention verifies the experiment through VISSIM, adopts the setting of two lanes, the width of the lane is 3.5m, and the period of the intersection signal light is 60s, wherein the period of the green light is 30s. The source flow is 600(veh / h) and increases by 200(veh / h) every 5 cycles. After reaching 1200(veh / h), maintain it for 10 cycles, and then reduce it to 600(veh / h) at a rate of 200(veh / h) every 5 cycles. When it is less than 5km / h, it is in the queuing state, so it can be seen that the speed of the start-up wave is a certain value, which is in line with the vehicle driving characteristics in the VISSIM software. Under the initial setting of the simulation software VISSIM, k j =130(veh / km), the saturated flow rate is S=1800(veh / h), which is the optimal traffic flow q m . According to the characteristics of the Grenberg model are:

[0041] k m =k j / e

[0042] Here the natural constant e approximately takes the value of 2.7, from which k can b...

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Abstract

The invention provides a method for calculating the signalized intersection vehicle queuing length under the saturation condition. The method is based on the traffic wave theory and includes the following steps: (1) collecting signalized intersection information, (2) calculating the signalized intersection saturation queuing length, and arranging a vehicle detector at the position the signalized intersection saturation queuing length away from the stop line, (3) monitoring the occupation rate of the vehicle detector in real time, determining the vehicle queuing condition by detecting the occupation rate of the vehicle detector, and determining the state switching time point according to the occupation rate, and (4) conducting vehicle queuing length modeling calculation. Finally, the method for calculating the signalized intersection vehicle queuing length under the saturation condition is achieved. The method has the advantages of being high in accuracy and low in calculation complexity, and can meet the requirement of practical application.

Description

technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to a method for calculating the queuing length of vehicles at saturated signalized intersections based on traffic wave theory. Background technique [0002] Vehicle queuing length and queuing duration are important basis for the traffic management and control department to formulate and implement management control measures, so it is of great practical significance and application value to study the calculation method of vehicle queuing length and queuing time. [0003] In the research process of traffic flow theory, many calculation methods of queuing length have been proposed successively, among which the more classic ones are MILLER, AKCELIK, SYNCHRO3, SIGNAL94, TRANSYT queuing length models. However, these models require the average arrival rate of vehicles at each entrance to be stable throughout the time period, and it is necessary to measure the vehicle arr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/01
Inventor 李昱台宪青王艳军赵旦谱
Owner JIANGSU R & D CENTER FOR INTERNET OF THINGS
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