Numerical Analysis of the Pavement Luminance Coefficient Characteristics of Highway Tunnels

During the daily operation process of highway tunnel, illumination is one of the major factors influencing the operation quality. In relevant references, there are many researches on the factors of tunnel illumination light layout, light distance, light distribution curve and etc. but few researches on the pavement optical characteristics on the illumination quality in different working conditions. This article researches on five different pavement types, makes numerical analysis on the pavement luminance coefficient characteristics of highway tunnels with illumination calculation program, to master the influence of pavement optical characteristics on illumination index. In order to increase the model's accuracy and the conclusion's reliability, comparative analysis is made on the light distribution curves of two different lamps (light distribution curve1 and light distribution curve 2). The following conclusion is made: in different pavement characteristics, the luminosity of the same light distribution curve is the same while the brightness is different, therefore the ration is not a definite value; the light distribution curve shall match the reflecting characteristics of the pavement to achieve the best illumination index.