Urban road network signal timing optimization method based on two-stream theory

A signal timing and urban road network technology, applied in the research field of transportation planning and management, can solve the problems of lack of dynamic research and scientific distinction of research methods

Active Publication Date: 2019-05-17
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

First of all, the evaluation and analysis of the current urban road network traffic conditions are mostly biased towards normal analysis and lack of dynamic research, especially the comparative analysis of the real-time operation status of the road network under different traffic demand m...

Method used

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  • Urban road network signal timing optimization method based on two-stream theory
  • Urban road network signal timing optimization method based on two-stream theory
  • Urban road network signal timing optimization method based on two-stream theory

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Embodiment 1

[0114] A pairing optimization method for urban road network signals based on second-rate theory, such as figure 1 As shown, the key point of the present invention is the dynamic evaluation index of the road network, which can not only reflect the operating efficiency of the road network, but also be the iterative convergence standard of the method.

[0115] T sIndicates the average stoppage time per unit distance of all vehicles in the research road network. The stoppage time here refers to the temporary parking caused by signals, signs, temporary loading and unloading, temporary loading and unloading, traffic congestion, etc. in the network flow, but not Including parking in the parking lot and long-term parking on the side of the road, etc., this indicator can obtain the total parking time and total driving distance of all vehicles through GIS, GPS, license plate recognition, vehicle detectors, etc., and then pass the total parking time Divide by the total distance traveled...

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Abstract

The invention discloses an urban road network signal timing optimization method based on a two-stream theory, which is characterized in that a dynamic index Ts/T for measuring the running condition ofa road network is provided based on the traditional two-stream theory, according to the vehicle flow of the road network and the Webster signal timing method of a single intersection, the running conditions of all intersections in the urban area road network is simply evaluated, the signal timing of the intersections with congestion is optimized, the method is helpful to reduce the congestion, improve the operation efficiency of the overall road network, reduce the travel time and cost of the people, provide valuable technical basis for regional signal control and intelligent traffic development, and a traffic demand matrix is combined, the running condition of the road network is monitored in an instant or for a short time, the signal timing of the road network can be effectively and reasonably optimized, the method is simple and easy to implement, a new thought is provided for regional signal timing, and the method has practical significance.

Description

technical field [0001] The invention relates to the research field of transportation planning and management, in particular to an urban road network signal timing optimization method based on second-rate theory. Background technique [0002] Urban residents cannot live without traffic, and congestion has become one of the most serious problems facing many cities. At present, the evaluation of road network operation status at home and abroad generally uses road service level, road congestion, lane occupancy rate, delay, travel speed and other indicators to quantitatively describe, although these indicators can reflect the average operation status of the road network over a period of time , but it cannot reflect the current specific information in real time or in a short period of time. [0003] In order to better describe the concentrated flow in the urban road network and use individual vehicles to reflect the overall road network conditions, Herman and Prigogine divided ur...

Claims

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Application Information

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IPC IPC(8): G08G1/08G06Q10/04G06Q50/26
Inventor 叶奕辰温惠英
Owner SOUTH CHINA UNIV OF TECH
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