Key path searching method of signal control crossing group

A technology of intersection group and critical path, which is applied in the direction of traffic signal control, can solve the problems of affecting the adjustment effect, weakening the real-time performance of the coordinated control system, and consuming a lot of time, so as to reduce computing time, enhance real-time performance and effectiveness, The effect of increasing size

Active Publication Date: 2017-06-30
SOUTHEAST UNIV
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Problems solved by technology

Among them, in the model adopted by the critical path search module, the calculation of the path correlation degree has a dimensionless step, so that the calculation of the correlation degree of each path depends on the extreme value of all path blocking correlation degrees and discrete correlation degrees

Method used

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  • Key path searching method of signal control crossing group
  • Key path searching method of signal control crossing group
  • Key path searching method of signal control crossing group

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Embodiment Construction

[0049] Such as figure 1 As shown, a method for finding the critical path of a signal-controlled intersection group includes the following steps:

[0050] (1) Obtain various data of the intersection group, including the range X of the intersection group, the number of intersections N, the key intersection K, the connection mode between the intersection and the road section, the number of lanes M of each entrance road, channelization Plans, etc., and obtain real-time traffic flow information such as queue length, vehicle speed, traffic volume and vehicle speed in each flow direction through electronic equipment.

[0051] (2) Traverse the data of all edge intersections, and calculate the discrete correlation degree I of all paths in the intersection group 1 ,Calculated as follows:

[0052] I 1 =n d / n 0

[0053] no d——The number of vehicles passing by the convoy within the green light time at the starting point of the route (veh)

[0054] no o ——The number of vehicles p...

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Abstract

The invention discloses a key path searching method of a signal control crossing group. The method comprises the following steps that (1) data of all roads and crossings of the crossing group is obtained; (2) an origin-destination discreteness associated index I1 of each of different paths of the crossing group is calculated according to the data; (3) an obstruction associated index I2 of each of the different roads of the crossing group is calculated; and (4) I, as a total association index of one path, is set to equal the sum of I1 and alpha*the mean of I2 of all the roads of the path, a population algorithm is used to search the paths of the crossing group, and the path whose I is highest is selected as a key path. According to the invention, fine tuning is carried out on a path association degree model, the path of the highest association degree is searched for, it is not required to traverse all the paths, the computing amount is reduced greatly, operation time of a time-space resource coordination optimization system of the whole signal control crossing group is reduced, the timeliness and effectiveness of coordination control are improved, and the crossing group that can processed can be in a larger scale.

Description

technical field [0001] The invention relates to the field of traffic signal control, in particular to a method for finding a key path of a signal-controlled intersection group. Background technique [0002] Most of the intersections on the arterial roads of the urban road network in my country are signal-controlled intersections, and single-point signal control is carried out respectively. Vehicles frequently stop at intersections during single-point signal control, which leads to traffic problems such as inefficient road network operation and increased travel delays. In order to reduce the parking time of vehicles at each intersection, the time-space resource optimization system of intersection group monitors the traffic volume in real time, and coordinates and controls multiple intersections as a whole to reduce the congestion of intersection groups. [0003] The existing coordination control system of intersection group is divided into five parts, including five steps of...

Claims

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Application Information

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IPC IPC(8): G08G1/08
CPCG08G1/08
Inventor 过秀成刘子曦曲俊蓉刘培吴鹏
Owner SOUTHEAST UNIV
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