2016 Volume 2 Issue 2 Pages A_144-A_150
This study focuses on a relation-ship between velocity and road design for performance oriented road and operational planning for arterial roads. We try to reveal the relation based on production (average flow) and accumulation (average density) in urban area, since it is difficult to measure uniform quality of service (travel speed) of different users' OD. First, a data set by urban area is processed from “Road Traffic Census” produced by MLIT in Japan. The data set contains longitudinal alignment of roads, spatial average speed, average network flow (production) and average network density (accumulation). Second, a multi-regression model, where the spatial mean speed is regarded as an objective variable, is calibrated. Density of signalized intersection is a significant explanative variable as well as traffic density in urban area. Third, a relation between travel speed and the density of signalized intersection is formulated as a performance function. This function will contribute to the performance measurement considering service level of access and egress in an urban area.
