Intelligent ramp entrance traffic demand combined control system and method

A joint control, traffic demand technology, applied in the direction of controlling traffic signals, the arrangement of variable traffic indications, etc.

Active Publication Date: 2014-02-26
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, most of the existing ramp control considers how to control the unfeasible demand f

Method used

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  • Intelligent ramp entrance traffic demand combined control system and method
  • Intelligent ramp entrance traffic demand combined control system and method
  • Intelligent ramp entrance traffic demand combined control system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0128] The upstream and downstream sections have the same capacity, F 1 =F 2 =6000 vehicles / hour; the critical density is car / mile, car / mile. Upstream and downstream entrance ramp flows r 1 =2700 vehicles / hour, r 0 = 0 vehicle / hour; flow rate of upstream and downstream exit ramps s 1 =1500 vehicles / hour, s 2 =1200 vehicles / hour.

[0129] It is easy to determine the value f of the two flow parameters from the measured traffic flow data 1 =6000=F 1 , f 2 =48002 , compared with the traffic capacity of the road itself, it can be seen that the road conditions at this time conform to the third situation above, that is, the situation where the upstream demand is not feasible but the downstream demand is feasible.

[0130] After determining the condition of the road, it is determined by the density state of the road whether ramp control is required:

[0131] 1) If the density of the roads detected in real time is less than the critical density of the road section, ramp co...

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Abstract

The invention, which belongs to the field of the intelligent traffic signal system control technology, discloses an intelligent ramp entrance traffic demand combined control system and method. The system is composed of a first main road detector, a second main road detector, a third main road detector, a first entrance ramp detector, a second entrance ramp detector, a first exit ramp detector, a second exit ramp detector, a first entrance ramp indicating device, a second entrance ramp indicating device, and controllers. According to the invention, traffic flow conditions of different positions like an upstream and a downstream of a main road and the like and different entrance-exit ramps are detected; according the traffic flow conditions of the different positions, inlets of ramp demands at different ramps are dynamically adjusted by using the two controllers, thereby preventing traffic congestion of the main road. The provided system and the method have the following advantages: normal operation of the main road traffic can be ensured with the infeasible requirement; and the road congestion can be alleviated by adjusting the ramp demand under the feasible requirement.

Description

technical field [0001] The invention belongs to the technical field of intelligent traffic signal system control, in particular to an intelligent ramp entrance traffic demand joint control system. Background technique [0002] With the rapid economic development of my country's big cities, the number of motor vehicles has increased rapidly, and urban road congestion has become increasingly serious. Traffic congestion has brought many negative effects: 1) It has caused a waste of road resources and a waste of travel time for travelers; 2) It has led to an increase in traffic accidents and has also posed a huge threat to the traffic safety of travelers; 3) It increases exhaust emissions and energy consumption. Therefore, how to alleviate the traffic congestion on urban roads has become an important topic in the field of transportation. And the ramp control has become an effective measure to improve the operating efficiency of the road and alleviate or avoid traffic congestio...

Claims

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Application Information

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IPC IPC(8): G08G1/08G08G1/09
Inventor 赵小梅耿男谢东繁
Owner BEIJING JIAOTONG UNIV
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