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The Effects of Road Lighting on Traffic Safety in Nighttime

道路照明对夜间交通安全的影响

基本信息

批准号：
07650612
负责人：
KOIKE Hirotaka
金额：
$ 1.15万
依托单位：
Utsunomiya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650612/
关键词：
Traffic Safety Road Lighgting Nighttime Accident Illumination Distribution 地理情報システム

项目摘要

There is a steady tendency of traffic accidents increase in nighttime due to the change of our life style. Considering the relationship between nighttime accidents and road lighting, this study demonstrated the facility improvement strategies for road lighting in order to prevent traffic accidents in nighttime. In the study, an onboard automatic data acquisition system was developed, and actual road illumination data in Utsunomiya city were collected and a database was established using GIS.In addition, traffic accident data were correlated with illumination data in the same geographical point of road.The findings from this srudy are as follows :(1) Accidents occurred more frequently in the road section where illumination fluctuates with higher level of variance. On the other hand, the accidents occurrence tends to be lower as the reduction of illumination variances as well as the increase of average level of illumination.(2) Generally speaking, while increasing number of road lighting installation tends to reduce traffic accidents, the excessively intense lighting from roadside developments shows the tendency to cause higher traffic accidents. A continuous sidewalk lighting brings about a good effect on the reduction of accidents on the road. However, the unusually higher illumination such as gas stations and convenience stores increases the risk of traffic accidents in nighttime.As a conclusion, it would be necessary to control the exceeding level of illumination from roadside developments, in addition to the provision of the continuous road lighting system in order to reduce the nighttime traffic accidents.

由于我们生活方式的改变，夜间交通事故呈持续增加的趋势。考虑到夜间交通事故与道路照明的关系，本研究展示了道路照明设施的改进策略，以防止夜间交通事故的发生。在研究中，开发了车载自动数据采集系统，利用GIS采集宇都宫市实际道路照明数据并建立数据库。此外，交通事故数据与道路同一地理点的照明数据相关联。研究结果表明：(1)交通事故发生在光照波动较大且方差较大的路段；另一方面，随着照明方差的减小和平均照明水平的提高，交通事故的发生率有降低的趋势。(2)一般来说，增加道路照明装置的数量倾向于减少交通事故，而路边开发的过度强烈的照明则倾向于造成更高的交通事故。连续的人行道照明对减少道路上的事故有很好的效果。但是，加油站、便利店等照明强度异常高的地方，夜间发生交通事故的风险也会增加。综上所述，除了提供连续道路照明系统外，有必要控制路边发展项目的照明水平，以减少夜间交通事故。