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

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...

AI Technical Summary

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 the excessive speed of some vehicles and increases the speed difference between vehicles, thereby increasing the accident risk

In addition, since the driver cannot understand the traffic status of the road ahead (such as congestion and queuing, etc.), it is easy to drive too fast, and it is too late to slow down when he notices the traffic problem ahead, thereby inducing traffic accidents

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