2017 Volume 3 Issue 2 Pages A_135-A_144
Follower density and Percent-time spent following (PTSF) are often used as a measure of effectiveness (MOE) on two-way two-lane expressways. In this paper, in order to estimate the two MOEs instead of traffic detector data installed at most one access-controlled section (e.g., one IC pair), ETC2.0 probe data, which contain velocity records observed at every 200m, are used for calibration of traffic simulation model. The two MOEs are also estimated at an interval of 200m. Findings are summarized as follows; 1) Follower density increases shortly after the end of auxiliary lane, 2) the level of service is acceptable at relatively low flow-rate according to available literatures, 3) at relatively high flow-rate (e.g., 600-800 pcu/h) the two MOEs are estimated as a low level of service and 4) in case of taking longitudinal gradient into account, the level of service becomes worse than that of case of flat road. However, it is also found that the spatial variation of the estimated MOEs is insensitive and needs further exploration.
