Expressway variable speed limit control method on basis of operation state of traffic flow

A technology of expressway and running state, applied in the field of intelligent traffic management and control, it can solve the problems of too fast speed, too late to decelerate, and inability to adjust the speed limit of road traffic flow.

Active Publication Date: 2012-07-04
SOUTHEAST UNIV
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Problems solved by technology

[0003] The operating status of road traffic flow changes in real time, while the traditional road speed limit is a fixed value, which cannot be dynamically adjusted according to the real-time road traffic flow operating conditions
In some traffic flow states, the traffic flow is large and the vehicle speed is low, but the speed limit value is still a high speed limit value, which leads to

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  • Expressway variable speed limit control method on basis of operation state of traffic flow
  • Expressway variable speed limit control method on basis of operation state of traffic flow
  • Expressway variable speed limit control method on basis of operation state of traffic flow

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Embodiment Construction

[0020] The present invention proposes a control method for variable speed limit on express roads based on the state of traffic flow. The variable speed limit control system controls the speed limit value of express roads. Express roads have multiple sections with different speed limit values. Sections carry out variable speed limit control respectively, such as image 3 shown, including the following steps:

[0021] 1) Set up traffic flow parameter detection equipment on the expressway to collect real-time traffic flow information on the road section to be controlled, including speed, flow, and occupancy rate. The detection accuracy is once every 5 minutes, that is, a detection cycle of 5 minutes;

[0022] 2) Transmit the detected parameters to the background central computer, and judge the current time at the same time. The control system only controls the speed limit value during the time period of 7:00-19:00 a day. If it is not within this time period, then "Keep speed, dr...

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Abstract

The invention relates to an expressway variable speed limit control method on the basis of an operation state of a traffic flow. According to the real-time change of the state of the traffic flow of an expressway, the speed-limiting value of the expressway is automatically regulated and speed-limiting information is released to a driver by a variable message sign, so that the probability of a traffic accident is reduced and the road traffic safety is improved. According to the invention, real-time traffic flow operation characteristic parameters are acquired by utilizing traffic flow detection equipment; according to various traffic states, the speed-limiting value of a road is automatically regulated; and the defect that the speed-limiting value of the existing road can only be constant is overcome. The dynamic speed limiting method according to the operation state of the traffic flow has practical engineering application value on the aspects of the traffic management and control of the expressway.

Description

technical field [0001] The invention belongs to the technical field of traffic intelligent management and control, performs dynamic speed limit control on expressways according to the real-time traffic flow operation state, and is a variable speed limit control method for expressways based on the traffic flow operation state. Background technique [0002] Highway speed limit has always been a hot issue in traffic safety. According to the 2005 and 2006 "Annual Report on Traffic Accidents of the Ministry of Public Security of the People's Republic of China", about 10% of the accidents from 2005 to 2006 were related to vehicle speeding, ranking first among various accident causes. Previous studies have shown that higher driving speeds lead to higher collision risk and accident severity, because under high-speed driving conditions, drivers do not have enough reaction time to take corresponding measures to avoid dangerous situations, such as sudden braking and acceleration of the...

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Application Information

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IPC IPC(8): G08G1/09
Inventor 刘攀李志斌王炜万晶晶
Owner SOUTHEAST UNIV
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