主催: Eastern Asia Society for Transportation Studies
p. 332
Uninterrupted facility forms interrelation of cause and effect among traffic volume-speed-density, so if ramp traffic flow is merged into main, not only single variable such as speed or density but also qualitative change of traffic flow are caused by correlation. Thus, this study used the traffic data which are continuous temporally and spatially in various of traffic conditions, to find out correlation change section by speed-density traffic flow model. As a result of analysis, it was found that downstream section where traffic flow (decelerated by merging) is recovering changed to "Greenshields" model, and that spatial transition occurs as traffic flow moves farther towards downstream (starting from merge terminal point of lane 3), change section would shift to inner lane within the extent of downstream 100m~500m. It was also discovered that upstream, merge and downstream(which were applied as section dummy variables) showed heterogeneous traffic flow characteristics.
