【摘要】 路段行程时间的估计和预测是诱导系统的关键技术之一。由于路网参数不断变化,路段行程时间的估计必须满足实时性的要求。以城市交通控制系统的基本设施为基础,根据我国城市交通目前的发展状况,分析了影响路段行程时间的各种因素和路段行程时间的组成。利用设置在路段上的车辆自动检测装置搜集到的实时交通流信息,并结合随机服务系统的相关理论建立了城市道路路段行程时间的动态计算模型,提出了一种具有真实最短路径意义的实时动态最短路径选择的方法。更多还原

【Abstract】 The estimation and prediction of road travel time is one of the key technologies for the route guidance system.Because the(parameters) of the road net are variable,the estimation of link travel time should satisfy the real-time requirement.Based on the facilities of urban traffic control system,various kinds of factors affecting travel time and the time composition are analyzed according to the(present) condition of urban traffic in China.Real-time traffic information got by the automatic detectors on roads is used to establish models of(dynamic) travel time combined with the theory of stochastic service system,and the methods of selecting the real shortest path is put(forward).更多还原