面向行车预警的临界安全车距研究

Research on Critical Safety Vehicle Interval for Traffic Warning

已有的车距计算模型与实测数据存在差异,主要原因在于现有的计算模型对汽车的制动性能及诸如路面附着系数、驾驶员的操纵特性等影响因素存在一些模糊认识。本文对安全车距的内涵进一步解析,并对距离进行分项,详细论述了安全车距的具体涵义,提出了临界安全车距的理论计算方法,为行车预警中的车距预警提供理论研究基础。

There are some differences between the existing vehicle interval models and the measured data,the main reason is that the existing models have fuzzy understanding of the car’s braking performance and other factors such as the pavement adhesion coefficient,the driver’s operating characteristics.In this paper,the connotation of the safety vehicle interval was further analyzed,and the interval was divided into three parts.The specific meaning of the safety vehicle interval was discussed in detail.The theoretical calculation method of the critical safety interval was put forward,which provides the theoretical basis for the vehicle interval warning.