指路标志对人们的出行有着非常良好的指引作用，良好的指路标志设计可提高驾驶人的通行效率。路网中节点处标志信息量的多少会影响驾驶员对标志信息的识读，进而影响到整个路网的通行效率。因此，通过引入节点的指路标志信息量作为惩罚系数，计算得出路段成本，建立起讫点（origin to destination, OD）间指引路径规划模型，结合A^*算法，遍历整个路网，最后得出OD间的最优指引路径，通过在指引路径上增设指路信息，从而完善OD间指路标志信息的连贯性，更好地引导驾驶员做路径选择，降低路网中的交通压力。并选取甘肃省庆阳市的火车站（O点）到人民医院（D点）的区域进行实际应用与分析。

Guide signs have a very good role in guiding people's travel, and good design of guide signs can improve the efficiency of drivers. The amount of sign information at the nodes in the road network affects the driver's reading of the sign information, which in turn affects the access efficiency of the whole road network. Therefore, by introduced the amount of guidance sign information from nodes as a penalty coefficient, the cost of the road segment was calculated, and a guidance path planning model between origin to destination (OD) was established, Combined with the A^* algorithm, the entire road network was traversed to obtain the optimal guidance path between ODs. By added guidance information on the guidance path, the coherence of guidance sign information between ODs was improved, guiding drivers can make better path, and reduce traffic pressure in the road network. At last, Select the area from the railway station (point O) to the People's Hospital (point D) in Qingyang City, Gansu Province for practical application and analysis.