Abstract
In order to ensure the driving safety of high-altitude highway tunnel and effectively reduce the lighting cost, this paper adopts the method considering the influence of automobile headlights luminance which combines reaction time incremental theory at different altitudes and lighting design simulation calculation. The paper has studied the design pattern of high-altitude highway tunnel, which are dominated by fixed lighting and supplemented by automotive lighting. The results show that: to ensure driving safety, the luminance of the lighting design for interior zone of highway tunnel increases with the increasing altitude. Based on the supplementary lighting of automobile headlights, the lighting design standards for the interior zone of high-altitude highway tunnel(the altitude is 2000m, 3000m, 4000m, 5000m respectively) are 0.73cd/m2, 0.82cd/m2, 0.91cd/m2, 1.0cd/m2.
Highlights
The number of high-altitude highway tunnel is increasing year by year [1]
A typical feature of the driving environment in high-altitude tunnel is the low-oxygen environment, which conduces to the increase of the reaction time of drivers, and is not conducive to safe driving [2].in the lighting design of tunnels in high-altitude environment, the lighting luminance needs to be improved if environmental factors are considered, but it is disadvantageous to reduce energy consumption, especially for super-long highway tunnels
This paper studies the automobile headlights, determines the luminance of the automobile headlights, and proposes the recommended design lighting values of high-altitude tunnel using the supplementary lighting
Summary
The number of high-altitude highway tunnel is increasing year by year [1]. A typical feature of the driving environment in high-altitude tunnel is the low-oxygen environment, which conduces to the increase of the reaction time of drivers, and is not conducive to safe driving [2].in the lighting design of tunnels in high-altitude environment, the lighting luminance needs to be improved if environmental factors are considered, but it is disadvantageous to reduce energy consumption, especially for super-long highway tunnels. Considering the impact of the special environment at high altitudes, correcting and improving the minimum lighting luminance design value given by the criteria can effectively ensure the driving safety of drivers of high-altitude highway tunnels. In order to convert the wattage of automobile headlights in the tunnel into the luminance on the ground in the tunnel, the illumination analysis software DIALux was used to establish a three-dimensional lighting model of the automobile headlights in high-altitude highway tunnel, which simulated the lighting conditions of dipped headlights in the dark tunnel. The luminance of automobile headlights of high-altitude highway tunnel was obtained and determined.
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