车内路线诱导系统行程时间检测误差计算模型

行程时间是车内路线诱导系统诱导策略的重要参数。根据车内路线诱导系统的检测和计算机行程时间的过程，分析了得程时间误差产生的三种主要原因：样本特征差异、时变特征以及时间滞后，并建立了时变特征误差、样本特征误差与车内单元比例、诱导系统方案更新时间之间的相互关系模型，对于城市道路还得出了信号交叉口延地行程时间误差的影响模型。

Calculating Model for Travel Time Error of in-vehicle Route Guidance System

Travel time is a very important parameter that is used in-vehicle route guidance system to make route guidance strategy. Based on the process of in-vehicle route guidance system measuring and calculating travel time, this paper analyses the principal reasons accounting for travel time error, that is the differences in driver character, time-varying characteristics and time lagging characteristics, and sets up calculating models which represent relations between driver character error, time-varying characteristics error and the percentage of vehicles equipped, travel time updating interval. For urban streets, an impacting model of signal delay on travel time error has been found. These models can not only be used to determine a minimum percentage of vehicles equipped to make in-vehicle route guidance system work normally and the optimal travel time updating interval, but also be used to evaluate system benefits and system reliability.