TRAFFIC ASSIGNMENT BY NETWORK DECOMPOSITION AND CONTINUUM APPROXIMATION

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  • ネットワークの分割と連続体近似による交通量配分
  • ネットワーク ノ ブンカツ ト レンゾクタイ キンジ ニ ヨル コウツウリョウ

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Abstract

This paper proposes a traffic assignment method employing the concept of network decomposition and continuum approximation. The whole network is decomposed into many small elements and the detailed network in each element is aggregated and approximated as a continuum. Each element is altered by a hypothetic link, and the relation between average travel time and traffic volume through an element is described by element performance function. Using this approximation, the scale of concerned network is reduced and the calculation cost of the User Equilibrium assignment can be greatly saved. Numerical examples show the stability of the estimated parameters of the element performance function and the availability of the proposed approximation method.

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