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Traffic signal control method in urban traffic management

A traffic signal and urban traffic technology, applied in the field of traffic signal control, can solve problems such as the inability to adjust traffic demand, and achieve the effect that the traffic state will not deteriorate

Inactive Publication Date: 2012-09-26
ZHEJIANG UNIV
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the existing signal control method cannot adjust the traffic demand, the present invention proposes a traffic demand control method, which can adjust the traffic flow entering the congested area and achieve the purpose of alleviating traffic congestion

Method used

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  • Traffic signal control method in urban traffic management
  • Traffic signal control method in urban traffic management
  • Traffic signal control method in urban traffic management

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] In Figure 1, the coil detectors are respectively the middle part of the road section, the road section entrance and the road section exit, and are respectively called the middle part detector, the entrance detector and the exit detector, and are used to detect information such as traffic flow and occupancy rate of each lane. Among them, the entrance and exit detectors detect the flow, while the central detector detects the occupancy and flow at the same time.

[0026] For a road section in the road network, if the traffic state detected at a certain moment is relatively congested, it is necessary to control the traffic demand flowing into the road section. Figure 2 is a logic diagram of demand control triggering. When two conditions are met at the same time, demand control is triggered: one is the ratio of inflow and outflow, and the other is traffic i...

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Abstract

The invention relates to a traffic signal control technology and aims to provide a traffic signal control method in urban traffic management. The method comprises the steps of: judging crowding conditions through a loop detector, and triggering demand control if traffic intensity parameters and inflow and outflow rate parameters reach the preset threshold values; screening a reasonable path from each node to crowded section according to a road network topological structure, and obtaining a demand control phase; and calculating an inflow and outflow rate of the crowded section, and determining a compression ratio of the demand control phase. According to traffic signal control method, few data is required, only flow data and occupancy data are required, and the method is low in dependency of the road network topological structure and suitable for a road network with any topological structure. The traffic demand is controlled, so that the traffic flow entering the crowded section is equal to traffic flow pulling out, and the phenomenon that the traffic state of the road section is not worsened can be fundamentally ensured.

Description

technical field [0001] The present invention designs a traffic signal control method used in urban traffic management, and specifically relates to a method for controlling traffic demand by using traffic signals to achieve the purpose of alleviating traffic congestion. Background technique [0002] Traffic signal control is one of the important means of urban traffic management, which has the characteristics of directly facing traffic flow and quick results. The current traffic signal control methods can be divided into single-point control, arterial coordinated control and regional control in terms of scope. Single-point control relies on pre-measured or real-time detection of the flow rate of the ring coil detector to optimize the timing of single-point signals; trunk line coordinated control pursues the operating efficiency of the flow in the direction of the trunk line, while regional control relies on the flow rate detected by the detector within the area , to optimize...

Claims

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Application Information

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IPC IPC(8): G08G1/08
Inventor 祁宏生王殿海陈鹏
Owner ZHEJIANG UNIV
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