随着我国道路交通事业的迅猛发展和机动车辆数量的飞速上升,由机动车引发的交通事故不断增多。交通伤害已成为对人类生命安全威胁最大的“第一公害”[1-2]。而中国交通事故死亡人数连续十余年居世界首位。截至2008年底,全国的机动车保有量达到了1.6亿多辆,驾驶人1.8亿人。交通 With the rapid development of road transport in our country and the rapid increase in the number of motor vehicles, the number of traffic accidents caused by motor vehicles has been on the rise. Traffic injuries have become the “first nuisance” which threatens human life safety the most [1-2]. The number of deaths from traffic accidents in China ranks first in the world for more than ten consecutive years. By the end of 2008, the number of motor vehicles in the country had reached more than 160 million vehicles and 180 million drivers. traffic