Abstract
Reliability can evaluate traffic condition qualitatively. However, it is difficult to estimate link reliability. The method proposed by Wakabayashi et al. is effective, but there are some problems in practical use. In this study, for developing the more effective method, the problems of this method are discussed and the propagation mechanism of OD flow is analyzed. Firstly, transferability of the method by Wakabayashi et al. is shown. Secondary, the equation of the relation between OD flow variation and link flow variation is developed. From these analysis, the key to an effective method to estimate link reliability is shown.
