Research on Light Environment Improvement Framework of Highway Tunnel Based on Visual Guidance
(2.Guizhou Transportation Planning Survey and Design Academe Co., Ltd. , Guiyang, Guizhou, China 550000)
【Abstract】To solve the contradiction between energy saving and traffic safety with regard to the lighting environment of a highway tunnel, the problems and existing improvement methods of such an environment are analyzed, based on which, a simple sorting method is adopted to compare the sight guidance, protection, anti-skid, shading, and lighting facilities in terms of economy, durability, and construction difficulty. Moreover, the safety demands of highway tunnel drivers are analyzed according to accident causes. The results show that a visual guidance facility that can reconstruct the visual reference system of a highway tunnel is the first choice for optimization of the lighting environment. In a tunnel section, such a guidance system can effectively control the driver’s visual capabilities, meet the driver’s safety demands, and reduce poor driving behaviors and traffic accidents. Safety demands a sense of speed, distance, direction, and location. Retro-reflective visual guidance facilities are used to construct a safety visual reference system consisting of multi-frequency, multi-dimension, multi-shape, and multi-color information, which can strengthen the local brightness and contrast in a tunnel and improve the driver’s sense of speed, distance, direction, and position. A sight guidance system based on safety is suitable for a highway tunnel with low illumination. For low-grade highway tunnels without lighting, a guidance system can replace the lighting facilities. For high-grade highway tunnels with lighting, a guidance system can assist with the lighting facilities. Such a system can help realize a unification of energy saving and traffic safety in a tunnel environment.
【Keywords】 traffic engineering; highway tunnel light environment; visual guidance; visual reference system; visual illusion;
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