近年来，危险品运输车辆造成的交通事故逐渐增多，既严重威胁人民群众的生命财产安全，又对环境造成污染。1999年7月30日，在浙江省奉化市双皇岭地段，一辆满载化学溶剂的槽罐车因制动失效窜出公路撞上民宅，造成化学溶剂外泄；同年9月7日，一辆满载6．5吨液化气（相当于数十吨 In recent years, traffic accidents caused by dangerous goods transport vehicles have been gradually increasing, which not only seriously threaten the safety of people’s lives and property but also pollute the environment. On July 30, 1999, a tanker filled with chemical solvents sprang out of the road and hit a house due to braking failure at the Huanghuangling site in Fenghua City, Zhejiang Province, resulting in the release of chemical solvents. On September 7 of the same year, a Full load of 6.5 tons of liquefied gas (equivalent to dozens of tons