A Proposal for Evaluating Road Improvement Plan by Combining Traffic Assignment and Traffic-Flow Simulation

Abstract

To evaluate road improvement plan, we usually use the results, obtained by applying traffic assignment model in a macro level, and the computed saturations of intersections. However, there are disadvantages with each of them. Thus, we propose a combined model system with a traffic flow simulation. Furthermore, we propose a group of evaluating indices when we apply the combined model system by adding for the evaluation of the road improvement plan in practice. As an example, we applied the model system for the evaluation of the improvement plan of National Road No.156 in Gifu City.