Development of the Reliability Traffic Assignment Model based on the Travel Time Variation

통행시간변화를 고려하는 신뢰도통행배정모형 개발

  • Published : 1999.12.01

Abstract

This paper defines the reliable based route choice Principle and formulates the reliability based equilibrium traffic assignment using the Principle. The reliability is defined as the difference of travel demand and capacity using the interference theory of the system engineering. An efficient solution a1gorithm based on Frank-Wo1fe algolithm is Presented to calculate and compare the reliability based traffic assignment with conventional travel time based assignment using small and large scaled road networks. The results show that reliability based traffic assignment converges to equilibrium solution in a reasonable computing time. The equilibrium link flows between reliability and travel time based traffic assignment differ each other in the sense that reliability based assignment is assigned based on the maximum difference of travel demand and link capacity whilst travel time based is assigned on the shortest travel time.

교통혼잡이 만연된 도로와 교통혼잡이 발생하지 않는 도로에서는 운전자의 통행행태가 서로 다르다. 교통혼잡이 만연된 도로의 운전자는 자신이 선택할 경로가 혼잡으로 인해 발생할 통행시간변화를 우선 고려하여 경로를 선택한다. 본 연구에서는 통행시간변화를 고려하는 운전자의 경로선택행위를 모사하기 위하여 통행시간신뢰도를 새롭게 정의하고 신뢰도 통행배정모형을 정립하였다. 통행시간신뢰도는 통행시간변화의 정도에 의해서 결정되는 함수이며, 통행시간변화는 도로용량과 교통량의 함수이다. 본 연구에서는 신뢰도 통행배정모형을 이용하여 통행시간신뢰도를 극대화하기 위해 경로를 선택하는 운전자의 통행행태를 모사하였고, 그 해가 Wardrop의 균형상태를 만족시킴을 증명하였다. 그리고 가상 가로망을 대상으로 기존의 통행시간 통행배정모형과 비교, 분석하였다.

Keywords

References

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