雨天路面反射特性及其对道路照明质量的影响

Reflective Characteristics of Pavement on Rainy Days and Its Influence on Road Lighting Quality

目前针对路面材料尤其是雨天路面材料反射特性的研究很少,但这对于雨天道路照明设计至关重要。搭建了一套湿路面反射特性实验室测试系统,收集了20块沥青路面样品,采用模拟降雨装置淋湿路面,测试了样品在不同潮湿程度下的简化亮度系数表,根据上海市近一年的实时降雨量数据,分析得出适用于上海市的推荐湿路面简化亮度系数表。在典型道路照明设置条件下,将该表与CIE标准W1、W2、W3和W4表在平均亮度、亮度均匀度和纵向亮度均匀度上进行对比,发现差异较大并作了讨论。

Recent intelligent lighting design practices for the adverse weather conditions particularly for raining days are puzzled by the deficiency of road surface reflection data which is defined as r-table by the International Illumination Commission（ CIE）. The research about the modeling of wet road surface reflection property is quite limited due to the complexity of application reality and great challenges in the photometric measurement. To enable the specific road lighting adjustment for raining days,we set up a laboratorial measurement system for reflection characteristics of wet pavement. 20 pieces of asphalt pavement samples were gathered. A simulated rainfall system was used to wet the samples. Then we did a measurement of the reflection properties of wet road surfaces and analyzed the implementation of the measured r-table on the regional characteristics of Shanghai. According to the application analysis,a wet rtable for Shanghai has been recommended. Under typical road lighting installations,the average luminance,luminance uniformity and longitudinal luminance uniformity,calculated from this Shanghai table,were compared to those from CIE W1,W2,W3 and W4 tables. Great deviations were found and discussed.