THE EFFECT OF A NEW INTERCITY EXPRESSWAY BASED ON TRAVEL TIME RELIABILITY USING ETC DATA Hiroki YAMAZAKI†・ Nobuhiro UNO‡・ Fumitaka KURAUCHI§ † Assistant Professor, Academic Center for Computing and Media Studies, Kyoto University (Yoshida-honmachi, Sakyo-ku, Kyoto-shi, 606-8501, Japan, +81-(0)75-753-7436,
[email protected]) ‡ Associate Professor, Graduate School of Management, Kyoto University (Kyoto-Daigaku Katsura C-Cluster, Nishikyo-ku, Kyoto-shi, 615-8540, Japan) § Associate Professor, Department of Civil Engineering, Gifu University (1-1 Yanagido, Gifu-shi, 501-1193, Japan) This paper describes a method of evaluating the level of service of road networks, based on the average travel time and travel time reliability using electronic toll collection (ETC) data. We focused on the variance in travel time under normal circumstances; thus, traffic accidents were removed from the database, and any effect of individual vehicle preference was excluded. We evaluated the travel time distribution based on the average travel time from ETC data for each 15-min interval. The level of service in an actual intercity highway network was analyzed using the proposed method. This analysis showed that the level of service fluctuated according to the road section analyzed, the month, and the time of day. These findings were confirmed by the shape of the cumulative distribution and indices of average travel time and travel time reliability. Using the evaluation method described here, the analysis also confirmed the change in travel time distribution between major interchanges after the opening of a new intercity highway route. Because a great change in the traffic conditions occurred, we analyzed the relationship between traffic demand and the level of service using detector data.