Spatial Distributions of Flow Density and Crossing Density and the Dependency on Routing System

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  • 都市内の移動経路と流動量密度・交差密度の空間分布

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In this paper, we treat spatial distributions of flow density and crossing density in a unit square and circle with a uniform demand, and show their dependency on routing systems. First, we derive flow density and crossing density in a square with a rectangular grid transport system, comparing inner routing and outer routing systems, while both systems have same average travel length of internal journey. Outer routing brings about decentralized flow distribution and less amount of crossings. Second, we test flow density and crossing density in a circular city with a radial-arc transport system, comparing systems of radial routing, inner-ring routing, outer-ring routing, external-ring routing, and Kahlsruhe routing that gives minimum average travel length. We find out, for example, that Kahlsruhe routing brings about greater amount of crossings than inner- or outer-ring routing, but most of which concentrate at the center of the city.

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