中文摘要：

为了评价道路网中交通指路标志信息的连续性，根据指路标志信息的影响范围将道路网划分为两层次，利用有向图理论建立了路网模型。结合交通标志指路信息的设置与路径中的转向决策点，引入指路信息项系数与指路信息设置率，建立了指路标志信息连续性评价模型。研究结果表明：在两层次路网上设置指路信息能较好体现出行者寻路过程的规律与寻路过程的心理特征；当指路信息缺失时，仍能通过对路径决策点的转向概率选择特征进行特定路径连续性的量化评价；当路径的指路信息设置率与指路信息项系数均大于50％时，路径具有较好的连续性。

英文摘要：

In order to evaluate the continuity of guide sign information in road network, road network was categorized into two hierarchies according to the impact area of guide sign information, and the model of road network was set up based on directed graph theory. Considering the deployment of guide sign information and turning decision spot in the route, the guide information item coefficient and the setting ratio of guide information were introduced, and the continuity evaluation model of guide sign information was established. Analysis result shows that setting the guide information in the road network with two hierarchies can reflect the law and psychological characteristic for traveler during the road research process. When guide information is lost, the quintitutive evaluation of specific route continuity can be carricd out by using the turning probability selection characteristics of route decision spots. When both of guide information term coefficient and the setting ratio of guide information are larger than 50%, the route is better in continuity. 1 tab, 5 figs, 14 refs.