Tunnel entrance section vehicle flow control method

Abstract

The invention discloses a tunnel entrance section vehicle flow control method comprising the following steps: S1, vehicles running in a tunnel are enabled to run in different lanes according to vehicle size, and a vehicle flow at an entrance of a tunnel is subjected to different lane running control; S2, illumination difference between a lane part positioned inside a tunnel entrance and a lane part positioned outside the tunnel entrance, average vehicle flow speed difference between the lane part positioned inside the tunnel entrance and the lane part positioned outside the tunnel entrance, and a inside-the-tunnel vehicle flow of each lane are obtained; S3, based on the illumination difference between the lane part positioned inside the tunnel entrance and the lane part positioned outside the tunnel entrance, average vehicle flow speed difference between the lane part positioned inside the tunnel entrance and the lane part positioned outside the tunnel entrance, and a inside-the-tunnel vehicle flow of each lane, a BP neutral network classification and identification algorithm is used for obtaining an optimal speed limit value and reasonable acousto-optic early warning prompt information of each lane; S4, variable speed limit prompt information is respectively displayed on corresponding lanes, and acousto-optic early warning prompts about vehicle speed of the vehicles in the tunnel are given. Via the tunnel entrance section vehicle flow control method, overall control over speed of vehicle flows on large and small lanes can be realized, individual vehicles which touch a height limit bar are subjected to violation detection and punishment, a current situation that traffic accidents frequently occur at an entrance section of a driveway tunnel can be improved, and traffic efficiency and a safety level of the driveway tunnel can be raised.

Description

technical field [0001] The invention relates to the field of highway tunnel traffic management, in particular to a method for controlling traffic flow at a tunnel entrance section. Background technique [0002] The entrance section of the highway tunnel is an area where traffic accidents frequently occur. The main factors involved are that motor vehicle drivers have to adapt to the light changes inside and outside the tunnel at the entrance of the tunnel, as well as the change of the average speed of the traffic flow. The greater the difference in illumination, the greater the impact on the driver , the faster the average vehicle speed, the greater the additional cost. The traditional method is to add sun visors outside the tunnel or increase the lighting intensity inside the tunnel. The construction cost of the former is relatively high, while the daily cost of the latter is relatively large. In particular, the length of the sun visor and the intensity of lighting are diff...

AI Technical Summary

Problems solved by technology

[0002] The entrance section of the highway tunnel is an area where traffic accidents frequently occur. The main factors involved are that motor vehicle drivers have to adapt to the light changes inside and outside the tunnel at the entrance of the tunnel, as well as the change of the average speed of the traffic flow. The greater the difference in illumination, the greater the impact on the driver , the faster the average vehicle speed, the greater the additional cost

The traditional method is to add sun visors outside the tunnel or increase the lighting intensity inside the tunnel. The former is more expensive for construction, and the latter is more expensive for daily use.

In particular, the length of the sun visor and the intensity of lighting are difficult to change with seasonal changes and daily light changes. Traditional methods can hardly reduce traffic management costs and improve traffic safety based on the actual characteristics of road tunnels and real-time traffic conditions.

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