The Effects of the Shape Condition to the Function of Road network

通过对路网形状特征的分析，得出以下结论：(1)大多数路网形状指数对路段数比网络类型更敏感。(2)节点间距离指数对路段的响应更有效地缩短了节点间的总时间距离，不仅对网络规模敏感，而且对网络形状也很敏感，使节点间指标适应实际路网成为可能。例如，首先，我们比较了不同路网的效率，结果表明，福冈市道路网比其他城市道路网效率更高。其次，对福国纳市区高速公路建设的效果进行了分析，结果表明，高速公路的建设对该地区产生了巨大的影响。第三，分析了放射状道路和环状道路在放射状环状网络中的作用，指出了环状道路的重要性，建立了以全网平均节点间距离最小为目标的链路的数学模型和求解算法。

Analysing the characteristics of road-network shape, the followings were shown.(1) Most network shape indices are more sensitive to the number of links than the network types.(2) The inter-node distance index responses beter to the links effective to shorten the total time distanse among nodes, and it is sensitive to not only network scale but also network shap.Adapting the inter-nodes index to the real road networks, several kind of analyzes became possible. For example, first of all, we compared the efficiency of different road network, and it was shown that Fukuoka city road network is more efficient than other city road network. Secondly, we analyzed the effects of constracting the moterways in Fukuona city area, and it was shown that constracting those roads have huge impacts on the area. Thirdly, we analyzed the rolls of the radial road and the ring road in the radial-ring type network, and the importance of ring road was indicated.At the last analysis, we developed the mathematical model and the soluting algolism which serch the link minimizing the average internode distance on the whole network.