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

1.(1)通过对札幌和北海道地区基于轮胎类型差异的性能和人身伤害事故数据的冬季交通事故特征分析，发现无钉t13EA\：轮胎的车辆发生打滑事故的比例高于有钉轮胎的车辆。(2)利用北海道实际路面状况调查数据，考虑了北海道冬季路面状况和气候特征。(3)利用北海道地区道路的滑阻值对冬季道路的危险程度进行了评价，并绘制了危险程度图。(4)计算出防冰所需的除冰剂用量。在冬季道路交通信息系统方面：(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值较高。(2)为了预测一条路线上几个点的路面状况，采用了GMDH和网络法两种统计方法。(3)研究了灾害预期点路面温度的分析预测方法。

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.