Visual environment improvement design method for bridge-tunnel connection section of mountain expressway

Abstract

The invention discloses a method for improving the visual environment of the bridge-tunnel connection section of an expressway in a mountainous area. Red and white marking lines and raised road signs on the roadside road surface are arranged on the road edge of the tunnel exit and the overhaul road to form a spatial high-frequency visual information flow; Set vertical markings on the side walls and double-layer outline marks on the side walls, set mid-frequency yellow rhythmic curves on the side walls of the tunnel exit section and reinforced concrete guardrails at the bridge-tunnel connection section, and set colored asphalt pavement and visual Illusory markings together form the medium-frequency visual information flow; low-frequency blue rhythmic curves are set on the side wall of the tunnel exit section to form the low-frequency visual information flow. High, medium and low frequency vision systems all use high-strength retro-reflective materials to form a retro-reflective lighting system. Vein-type wind barriers are installed at the exit of the tunnel to realize the transition of crosswind, brightness, and rain protection at the entrance and exit of the tunnel. The invention can improve the driver's instantaneous perception speed, improve the distance perception ability of the driver during driving, and relieve driving fatigue at the same time.

Description

technical field [0001] The invention relates to a design method for improving the visual environment of a bridge-tunnel connection section of an expressway in a mountainous area, and belongs to the field of traffic auxiliary facility design. Background technique [0002] Compared with ordinary highway sections, the driving environment of the bridge-tunnel group section has its own characteristics: [0003] (1) The bridge-tunnel connection section frequently changes the driving environment in a short space, where the exit and entrance of the tunnel appear "black hole effect" and "white hole effect" due to sudden changes in the light environment and physical environment. [0004] The "black hole effect" is used to describe motor vehicle drivers who drive into the tunnel due to the large difference in illumination and brightness between the inside and outside of the tunnel, and the sharp transition of illumination and space. Physiologically, the pupils increase sharply, forming...

AI Technical Summary

Problems solved by technology

Insufficient lighting level at highway tunnel exits results in uneven distribution of pupil illuminance at tunnel exits, with great differences, which can easily cause contrast glare or adaptive glare at tunnel exits, and this glare is caused by unreasonable transition of tunnel exit illumination in the driver's field of vision. It has adverse effects on the driver's psychology and physiology, which greatly affects the driver's driving safety in the tunnel driving process

[0006] (2) The bridge-tunnel connection section combines the three structural forms of tunnel, bridge and road, and there are transitions and differences in linear design, anti-skid performance, lighting and climate environment in three different driving environments, so there is a greater operational risk

[0007] (3) Especially in mountainous areas, due to poor natural environmental conditions, such as heavy rain and fog, high precipitation, icy roads in winter, and unpredictable weather, the traffic environment is more different and disparate, and there are many hidden dangers in the traffic safety of the bridge-tunnel connection section

[0008] (4) The bridge-tunnel connection section belongs to the bottleneck road section of the traffic network, and rescue and evacuation are difficult, and secondary accidents are prone to occur, which increases the frequency of various emergencies inside and outside the tunnel and the required emergency rescue forces

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