Study on traffic safety in winter and ice control in relation to sutdded tire regulation

1.镶嵌轮胎使用规则对冬季交通安全的影响：(1)通过对札幌市和北海道因轮胎型号差异引起的冬季交通事故特征和人员伤亡事故数据的分析，发现无胎钉轮胎的打滑事故所占比例大于搭载胎钉轮胎的打滑事故比例。(2)利用北海道实际路面状况调查数据综合考虑了冬季路面状况和气候特征。(3)利用抗滑阻力值对北海道道路冬季道路的危害程度进行了评价。在冬季道路交通信息系统上：(1)对驾驶员的问卷调查结果表明，驾驶员对道路交通信息的期望程度较高。(2)为了预测路线上多个点的路面状况，采用了GMDH和网络法两种统计方法。(3)研究了危险预期点路面温度预测的分析方法。

1.The influence of studded tire usage regulation on traffic safety in winter :(1) From some analyzes of winter traffic accident characteristics due to tire type difference based property and human damage accident data in Sapporo and Hokkaido, it was shown that the proportion of skidding accidents with cars wearing studdless t13EA\ : ires was more than that of studded tires.(2) Road surface conditions and climatic characteristics in winter were considered from using actual road surface condition survey data in Hokkaido.(3) Degree of hazard of winter road using skidding resistance value was evaluated for roads in Hokkaido, and degree of hazard map was created.(4) The amount of deicing chemicals requiring for ice control was calculated.2.On the road traffic information system in winter :(1) From the results of questionnaire to drivers, it was shown that they expected the information on road traffic in consequence of studded tire regulation.(2) In order to predict road surface conditions of several points on a route, two statistical methods, that is, GMDH and network method, were applied.(3) The analytical method for prediction of road surface temperature at a hazard expecting point was studied.