关键词: 交通运输工程, 驾驶人, 过街行人, 夜间, 视认距离, 平均照度

Abstract: In order to determine reasonable lighting parameter at crosswalk of urban road and ensure driver's recognition to crossing pedestrian, experimental research on driver distance recognition was conducted. The impacts of crossing pedestrian amount, state (static or moving) and clothe color on driver recognition distance at night were analyzed. Change regulation of driver recognition distance vs. average luminance at night was also studied at different driving speed. Relationship model between driver recognition distance at night and average luminance, driving speed was established. Calculation method of average luminance value at crosswalk of urban road at night was presented based on safe discriminating conditions between driver recognition distance and response-braking distance. An actual example was given using this method. Results show that it is more difficult for divers to recognize crossing pedestrian at night when single pedestrian is static and clothes color is dark. And there is positive logarithm, negative linear relation respectively between driver recognition distance and average luminance, driving speed at night.

Key words: engineering of communications and transportations, driver, crossing pedestrian, nighttime, recognition distance, average luminance