自1984年我国开始建设第一条高速公路——沪嘉高速公路开始(长15.9公里),到现在已20多年时间,截止2006年年底,我国高速公路总里程达4.54万公里,路网已基本形成,总长度居全世界第二。高速公路监控系统也从无到有、从小到大、从模仿国外到完全自行设计并制定适合我国的相关标准,取得了相当大的成绩。尤其是近几年来,设计数 Since 1984, China began to build the first expressway - Shanghai-Jiazhou Expressway (15.9 km long), and now it has been more than 20 years. By the end of 2006, the total length of expressways in China has reached 45,400 km, and the road network has been basically completed Formation, the total length of the world’s second. Expressway monitoring system from scratch, from small to large, from imitating foreign countries to completely design and develop their own relevant standards, and achieved considerable success. Especially in recent years, the number of designs