汽车导航系统是解决城市交通拥堵的一种高科技手段，是21世纪智能交通（ITS）的发展方向。我们应跳出“要致富先修路”的单纯想法，用科学的方法减少占用可耕地，促进汽车工业的发展。文章着重介绍了汽车导航系统的结构与工作原理，提出了三重精度的工程方案，其市场前景广阔。

According to the principle of positioning a new car navigation system of triple accuracy which consists of GPS navigation,adaptive navigation and mpa matching is presented in this paper. At present, the most wide civilian application of the GPS is the car navigation system. It is a high technique method to solve traffic jam. It is a communication and transportation management mode in the 21st century. It is the intelligent transporation system (ITS).