Calculating method of effective capacity of road sections

A calculation method and technology of effective capacity, applied in traffic control systems of road vehicles, traffic flow detection, instruments, etc., can solve problems such as lack of real-time monitoring, and achieve the effect of preventing trunk line congestion

Inactive Publication Date: 2012-08-01
郭海锋
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AI Technical Summary

Problems solved by technology

However, the existing research still lacks consideration in two aspects. On the one hand, there is a lack of real-time monitoring of the operating status of the green wave coordinated control system on the trunk line; on the other hand, there is a lack of real-time detection of the effective space of the road section.

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  • Calculating method of effective capacity of road sections
  • Calculating method of effective capacity of road sections
  • Calculating method of effective capacity of road sections

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Embodiment Construction

[0037] In order to enable those skilled in the art to better understand the solution of the present invention, the specific implementation method of the technical solution will be further described in detail below.

[0038] A calculation method for the effective capacity of a road section, the specific calculation steps are as follows:

[0039] 1) Calculate the maximum number of vehicles that the current road section can accommodate

[0040] The maximum number of vehicles that can be accommodated in the current section can be calculated according to the formula Calculate and obtain, where L(i) is the length of the basic road section, l(i) is the length of the channelized road section, LV is the average vehicle length, SV is the distance between saturated vehicles, n is the number of non-channelized lanes, m is the channelized lane number.

[0041] 2) Calculate the number of vehicles in the current section of each lane

[0042] The number of vehicles on road section i consi...

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Abstract

The invention discloses a calculating method of effective capacity of road sections. The calculating method includes putting forward an effective bandwidth evaluation method to monitor the running status and the control effect of an existing artery green wave coordinated control system; and using transmission control protocol/ internet protocol (TCP/ IP) window flow control thought for reference to design a artery dynamic coordinated control method of the window flow control to control congested traffic flow of city arteries. Simulation tests and comparison results prove that downstream intersections can inform upstream intersections of the effective capacity of the road section in real time through a window flow notice mode, traffic signal controllers at each intersection can redistribute the green time of each traffic flow according to current traffic requirements and the road section effective capacity, so that road section queue and vehicle overflow caused by excessive distributed green time can be avoided.

Description

technical field [0001] The invention relates to the field of urban traffic arterial control, in particular to a method for calculating the effective capacity of road sections. Background technique [0002] The existing arterial coordinated control method mainly seeks to maximize the green wave bandwidth under given traffic conditions by adjusting the signal timing parameters of adjacent signalized intersections, so it is also called arterial green wave coordinated control. Practice has proved that the green wave coordinated control of the main line has a good control effect in the unsaturated condition, but it is far from the expected control effect in the saturated and oversaturated condition, and even the queuing vehicles overflow to the upstream intersection, resulting in a green light at the upstream intersection During this period, the vehicle cannot pass through the "deadlock" phenomenon. Judging from the development trend of existing products, when designing the gree...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/065
Inventor 郭海锋
Owner 郭海锋
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