PROPOSAL OF THE METHODOLOGY FOR DISCUSSING A TARGET TRAVEL TIME BASED ON ANALYSIS OF ACTUAL TRIP BETWEEN URBAN CORE AREAS

Abstract

Each prefecture has formulated a new regional road transportation plan, clarifying the hierarchy of routes and their service travel speeds within the regional road network. However, when considering travel between municipal offices and key facilities (hereafter referred to as ‘key hubs’), it is ideal to examine the road network based on the target travel times set by higher-level plans. Nevertheless, many higher-level plans in local government do not specify target travel times for travel between key hubs. Therefore, an empirical analysis of distances and travel times between key hubs, as well as the hierarchy of roads used for travel in Japan, is conducted in this study. Based on the results of this analysis, a method for determining target travel times is proposed. As a result of the analysis, it was confirmed that the types and proportions of roads used vary depending on the travel between targeted hubs. Furthermore, a method was implemented to evaluate target travel times based on the concept of a hierarchical road network, using empirical usage data obtained from actual road conditions.