A design method of vehicle speed control facilities at the entrance of highway tunnels in low-cost mountainous areas

Abstract

The invention discloses a low-cost mountainous-area expressway tunnel entrance vehicle speed control facility designing method which comprises the following steps of: setting red-and-white mark lines and road-side road surface and in-road lane line raised road signs on the side wall of the tunnel entrance, the lower edge of curb and the plane of the overhauling way at a space of 1.5-3m to form a high-frequency vision information flow; setting intermediate-frequency information at the tunnel entrance in the advancing direction every 20-30m, setting 3 layers of delineators on each side wall of the tunnel from top to bottom, setting a side wall vertical mark line and 2 side wall white broken lines, and setting a transverse staggered vision mark line and 2 white broken lines on the road surface to form an intermediate-frequency vision information flow; and forming a retroreflection illumination system from the retroreflecting materials by use of the high and intermediate-frequency vision information. Road-side road surface raised road signs and transverse deceleration mark lines (consisting of transverse vibration mark lines and transverse staggered vision mark lines) are arranged in front of the tunnel entrance, and the longitudinal space of the transverse deceleration mark lines turns smaller at first and then becomes stable to form a tunnel pre-deceleration system. The retroreflection illumination system and the deceleration system form the tunnel entrance vehicle speed control facility which realizes reasonable transition of the vehicle speed at the tunnel entrance and is suitable for the mountainous-area expressway tunnel entrance with the speed limit of 60-80km / h.

Description

technical field [0001] The invention relates to a design method of a vehicle speed control facility at the entrance of a highway tunnel in a low-cost mountainous area. The design method is adopted to realize the coordination of lighting energy saving at the tunnel entrance and tunnel traffic safety benefits. Background technique [0002] Tunnel entrance lighting and vehicle speed transitions are severe, speeding is common, rear-end collisions and side wall accidents are frequent. The "JTJ026.1-1999 Design Code for Ventilation and Lighting of Highway Tunnels" promulgated in 1999 and the "JTG / T D 71-2004 Code for Design of Road Tunnel Traffic Engineering" promulgated in 2004 have made the configuration of electromechanical facilities of road tunnels in my country reach a very high level. Level. For highway tunnels, according to my country's national standards, the lighting load should not be less than 60kW per kilometer of tunnel extension. Due to higher illuminance requireme...

AI Technical Summary

Problems solved by technology

However, due to the sharp transition of illumination at the entrance of the tunnel, it is difficult for the driver to find the ordinary traffic engineering facilities in the tunnel, and the accident data also shows that their effect is limited

Existing tunnel lighting mainly focuses on tunnel lighting energy-saving control, intelligent lighting control system, tunnel lighting settings combining natural light and artificial light, etc., and less research is based on traffic accidents, which also leads to high setup and operating costs, and poor traffic safety and benefits. match

At the same time, the existing speed perception improvement method based on visual optical flow rate lacks research on the sense of direction and distance, which also leads to a decrease in sensitivity, reduced speed control effect, and even retaliatory acceleration after the driver is familiar with local information.

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