A reliability evaluation method with a traffic assignment-model based on travel time percentile value and its application to the road network of Kanazawa City

摘要

現実の道路ネットワークでは，様々な要因により旅行時間や交通量は変動する．旅行時間のばらつきは交通行動の主要な決定要因の一つであり，それを道路整備の便益評価，交通計画や交通政策に取り入れることは重要であろう．本研究では，旅行時間のばらつきの尺度として，直感的な理解が容易なパーセンタイル値に着目する．旅行時間のパーセンタイル値に基づき，実用的にも適用可能な信頼性の評価法を目指し，旅行時間のパーセンタイル値を出力する交通ネットワーク均衡配分モデルを構築することが本研究の目的である．さらに，そのモデルを金沢市道路ネットワークに適用し，モデルを用いた信頼性評価法の現実ネットワークへの適用可能性について考察する． The traffic demand and travel time change according to various factors in an actual road network. The variability of travel times is one of the main decision-making factors of travel behavior. Therefore, it is important to incorporate it in the benefit evaluation of road maintenance and improvement project and the transportation planning/policy. In this study, the travel time percentile value, which is easy to understand, is focused on as a measure of the difference of the travel time. The aim of this study is to develop a practically applicable user equilibrium assignment model, which can output the travel time percentile values, as a practically applicable reliability evaluation method. In addition, the model is applied to the road network of Kanazawa City, and its applicability and usefulness to real road networks is examined.