Variable speed-limit control method of congested upper streams of snowy expressway

A technology of express roads and control methods, applied in the traffic control system of road vehicles, traffic control systems, arrangement of variable traffic instructions, etc., can solve frequent rear-end collision accidents, unreasonable speed limit values, and traffic congestion without consideration Upward issues such as travel

Active Publication Date: 2014-02-26
SOUTHEAST UNIV
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Problems solved by technology

[0004] Technical problem to be solved: Aiming at the deficiencies of the prior art, the present invention proposes a variable speed limit control method upstream of snow express road congestion, which solves the problem that the main means of ensuring the traffic safety of the express road under snowy weather in the prior art is not considered The characteristics of traffic congestion on expressways propagating upstream lead to technical problems such as unreasonable speed limit values ​​and frequent rear-end collision accidents

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  • Variable speed-limit control method of congested upper streams of snowy expressway
  • Variable speed-limit control method of congested upper streams of snowy expressway
  • Variable speed-limit control method of congested upper streams of snowy expressway

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Embodiment Construction

[0060] The present invention will be further described below in conjunction with the accompanying drawings.

[0061] A method for controlling an upstream variable speed limit of a snow express road congestion, comprising the following steps executed sequentially:

[0062] (1) Multiple traffic flow detectors are installed at equal intervals on the expressway, and the traffic flow detectors detect the traffic flow, traffic flow density, vehicle speed and occupancy rate of each road section every 30 seconds and transmit the data to the data platform ; These data include historical traffic flow data formed by long-term detection and real-time data detected during real-time control.

[0063] (2) The upstream of each traffic flow detector is equipped with a roadside variable information prompt board, and the distance between the roadside variable information prompt board and the matching traffic flow detector is L b Calculated as follows:

[0064] L ...

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Abstract

The invention discloses a variable speed-limit control method of congested upper streams of a snowy expressway. A plurality of traffic flow detectors are arranged on the expressway in an equidistant mode, the congested condition of each section of the expressway is judged based on traffic flow data, acquired through real-time and automatic detection, of each section of the expressway, spreading characteristics of congestion waves are used for calculation to select the optimum speed-limit value of the congested-section upper streams of the snowy expressway, the current speed-limit value is displayed in real time through a road-side variable speed-limit information prompting plate, and therefore the speed of running on the expressway under snowy conditions can be dynamically controlled. The variable speed-limit control method has important significance in reducing rear-end collisions happened when the upper streams of congested sections in snowy days are congested and improving running safety on the expressway in adverse weather.

Description

technical field [0001] The invention belongs to the technical field of traffic safety and intelligent traffic, in particular to a variable speed limit control method at the upstream of the congested section of an expressway under snow conditions. Background technique [0002] With the rapid increase in the mileage of expressways and the number of motor vehicles in my country, the related issues in the field of road traffic safety have been paid more and more attention. Under normal weather conditions, there is a set of speed limit control system. And under the snowy weather condition, the situation is complicated, and the speed limit control system under the normal weather condition is not suitable for the situation of the snowy weather condition. Due to the reduction of road surface friction coefficient in snowy weather conditions, the mutual embedding between the wheel and the road surface material is seriously affected, resulting in problems such as braking loss of contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/00G08G1/09G08G1/065
Inventor 李志斌刘攀王炜徐铖铖
Owner SOUTHEAST UNIV
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