Optimal path planning considering robustness based on the form of the travel time function

In this paper, we propose an optimization model for planning a robust path against changes in traffic volume. Robustness is based on the form of the travel time function. The proposed model can be applied not only when traffic volume increases but also when it decreases. In addition, the proposed model can set the ratio of consideration by a parameter depending on whether the traffic volume is increasing or decreasing. The effectiveness of the proposed model is evaluated using actual traffic data from the Kanto region in Japan.