乌鞘岭高速公路路段多发交通事故的气象条件分析

利用2006年1月1日至2013年5月31日甘肃省乌鞘岭路段高速公路发生的一般、重大、特大公路交通事故个例和同期乌鞘岭气象站的气象观测资料,利用统计方法分析天气现象和气象要素与公路交通事故的关系。乌鞘岭路段的交通事故一年中3月、7月、9月发生的几率较大,这与季节交替时气象要素变化显著、雨带北移、降水日数增多有直接关系。乌鞘岭路段公路交通事故,由不良气象条件引发的占总事故数的81%。发生交通事故中不良天气的排序依次为结冰、降雨、降雪、积雪、大雾。普查气象要素与交通事故相关性,发现最低温度、地面最低温度、相对湿度、能见度、日降水量、极大风速与公路交通事故具有显著相关。

Analysis of Meteorological Conditions About Highway Traffic Accidents in Wushaoling of Gansu

Based on the cases of highway traffic accidents and the corresponding meteorological observation data from January 1,2006 toMay 31,2013 in Wushaoling highway in Gansu Province,the correlation analysis of traffic accidents and weather conditions was con ducted by using statistical method. The results show that traffic accidents mainly occurred in March,July and September on Wushaolinghighway section,which was directly related to the remarkable change of meteorological factors with the seasons’coming and going andthe increasing of rainfall days when the rainband moved to north. The traffic accidents caused by bad weather conditions accounted for81% on Wushaoling highway section. The adverse weather conditions causing traffic accidents were freezing,rainning,snowing,snowcover and dense fog in turn. There were significant correlation between highway traffic accidents and minimum temperature,the groundminimum temperature,relative humidity,visibility,daily precipitation and extreme wind speed.