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Dynamic traffic demand-oriented intersection operation efficiency change rate calculating method

A technology of traffic demand and operating efficiency, applied in the field of intelligent transportation research, can solve problems affecting the operating efficiency of intersections and large deviations in evaluation results

Inactive Publication Date: 2016-06-01
ZHEJIANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

Traffic demand and control measures work together to affect the operational efficiency of intersections. The dynamic environment of urban traffic, especially the dynamic traffic demand environment, is highly irreproducible. Previous evaluation methods usually ignore the intersection traffic before and after the implementation of new measures or new schemes. There will be large deviations in the evaluation results due to changes in demand

Method used

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  • Dynamic traffic demand-oriented intersection operation efficiency change rate calculating method
  • Dynamic traffic demand-oriented intersection operation efficiency change rate calculating method
  • Dynamic traffic demand-oriented intersection operation efficiency change rate calculating method

Examples

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Embodiment Construction

[0072] The present invention will be further described below in conjunction with accompanying drawing

[0073] Taking the traffic flow of a specific intersection j in a certain city as an example, calculate the change rate of the operational efficiency of the intersection under the two control measures before and after, see figure 1 .

[0074] 1. Calculate the average delay time and queuing intensity at the intersection for each time period

[0075] (1), collect data

[0076] The traffic flow data required to collect the average delay time and queuing intensity of the intersection in each time period: the traffic flow q of lane group i i,j ;Related parameters in the calibration model: start-up wave velocity v p , the saturated flow S of lane group i i,j ; The signal timing parameters required in the investigation model: the phase red light duration r of the traffic flow corresponding to the lane group i i,j , the oversaturation duration T of the traffic flow corresponding...

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Abstract

The invention discloses a dynamic traffic demand-oriented intersection operation efficiency change rate calculating method. Average delay time of every vehicle and queuing length are selected at the same time to represent operation efficiency of an intersection traffic flow. With the help of the mapping relation between two indexes of different management and control schemes and the traffic demand, the efficiency index change rule of one traffic demand can be determined, and the comprehensive change rate index having the emphasis on the queuing length at the peak level and the emphasis on the delay time at the flat hump level and the valley level is formed to reflect the intersection operation efficiency change rate before and after the management and control schemes. The influence of the intersection dynamic environment change can be eliminated at the first time, and the limitation of the conventional way of taking the single traffic flow operation efficiency indexes as the assessment basis is broken, and the technical support and the decision basis can be provided for the objective and righteous assessment of the advantages and the disadvantages of the combinations of different intersection management and control schemes.

Description

technical field [0001] The invention relates to a dynamic traffic demand-oriented calculation method for the change rate of operation efficiency of an intersection, which is used for calculating the change rate of operation efficiency of a specific intersection under different time-space resource allocation measures, and belongs to the field of intelligent transportation research. Background technique [0002] Scientifically and rationally evaluating the changes in the operational efficiency of intersections under dynamic traffic demand is helpful to quantitatively compare the implementation effects of various traffic organizations and signal timing schemes, and to objectively and fairly evaluate the utilization efficiency of space-time resources at intersections. Measures provide a basis for decision-making. [0003] Commonly used evaluation indicators for intersection operation efficiency include average vehicle delay, queuing length, and queuing times. These evaluation i...

Claims

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Application Information

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IPC IPC(8): G08G1/01
CPCG08G1/0104
Inventor 马东方王殿海蔡正义金盛熊满初祁宏生章立辉
Owner ZHEJIANG UNIV
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