Intelligent transportation system is based on the relatively perfect infrastructures, and it effectively combines the advanced communication technology, control technology, positioning technology and sensor technology in order to solve various problems in the transportation, and improve the efficiency of road use. 智能交通系统是在比较完善的基础设施之上,将先进的通信技术、控制技术、卫星定位技术和传感器技术有效地结合,从而解决交通中的各种问题,提高道路的安全性和使用效率。