建立路阻函数是交通分配一个关键问题。
The establishment of the impedance function is a key to the traffic distribution.
城市道路的路阻函数是交通研究中的关键点和难点，对交通分配起着至关重要的作用。
Resistance function of urban road is the key and difficult problem in traffic study. It plays a vitally important role in traffic assignment.
介绍了道路权重的各种类型、路阻函数模型、交叉口延误模型和路网可靠度的研究成果。
Then it introduces the research fruit of road weight types, road impedance function model, intersection delay model, and network reliability.
论文最后尝试将在GM(1,1)模型基础上建立的路阻函数与蚁群算法寻优进行结合，并写出流程图。
Finally, the author combined the impedance function which is built up based on GM (1, 1) model with the ant colony optimization, and got the flow chart.
论文最后尝试将在GM(1,1)模型基础上建立的路阻函数与蚁群算法寻优进行结合，并写出流程图。
Finally, the author combined the impedance function which is built up based on GM (1, 1) model with the ant colony optimization, and got the flow chart.
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