尽管当今世界上各发达国家公路网密布、高速公路发达,但仍然无法避免交通阻塞、车祸频繁、经济损失逐年上升等问题。因此,进入90年代以来,智能交通技术受到发达国家的重视,并成为一个热门课题。 为了解决现今公路交通的诸多问题,除增建公路、控制需求、提高效能之外,还要开发先进的车辆道路电子信息系统,这已成为一个重要的发展方向。美国、西欧、日本陆续开展了一系列智能交通研究开发活动。正在研究开发的智能交通技术,涉及到交通管理、为司机提供信息、为司机提供帮助、提高商业汽车运营效率等几个方面。 Despite the densely populated road network and the developed expressways in various developed countries in the world today, problems such as traffic congestion, frequent car accidents and rising economic losses can not be avoided. Therefore, since entering the 90’s, the intelligent transportation technology has drawn the attention of the developed countries and has become a hot topic. In order to solve many problems of road traffic today, besides building additional roads, controlling demand and improving efficiency, it is necessary to develop advanced vehicle electronic information system for roads, which has become an important development direction. The United States, Western Europe and Japan have successively carried out a series of intelligent traffic research and development activities. Research and development of intelligent transport technologies are involved, including traffic management, providing information to drivers, providing assistance to drivers and improving the efficiency of commercial vehicle operations.