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汽车防撞和交通控制系统是交通工程的重要内容，二者又存在着不相融的特点。为同时实现该两项功能，我们在本文的参考文献[1]和[2]中介绍了两种功能兼顾的技术系统。该系统通过建立统一的标准时间体系，确定时间基准，提高计时精度和减小定位误差，实现路上行驶车辆的准确定位；并给出了预警判别式。在该成果的基础上，此项研究工作近期又取得新进展，修订了碰撞预警判别式，克服原有缺点，改进了系统的工作方式。系统结构也有相应更新。
Vehicle collision avoidance and traffic control system is an important part of traffic engineering, the two are not blending features. In order to achieve both functions simultaneously, we describe two functional systems of technology that are relevant in this reference [1] and [2]. The system establishes a unified standard time system to determine the time base, improve the timing accuracy and reduce the positioning error, to achieve the accurate positioning of vehicles on the road; and give the early warning discriminant. On the basis of this achievement, the research work has made new progress recently, revised the collision warning discriminant, overcame the original shortcomings and improved the system’s working methods. The system structure is also updated accordingly.