교차로 통과 버스전용차로 효과 분석 연구

A Study on Intersection Passing Bus Lane At An Signalized Intersection

&nbsp;&nbsp;A median bus lane(MBL) and a side bus lane(SBL) have been widely used to increase the mobility of bus along the urban arterial. However the latter has many defects that resulted from shared bus lane with right-turn traffic at the approach to the intersection, in-out traffic of driveways and taxi uses to increase bus mobility along the arterial. Especially the former has been contributed both to increase the bus travel speed and to reduce the bus delay time at an intersection, but it has many restricts to apply and implement to the field.<BR>&nbsp;&nbsp;In this paper, a new approach of bus lane, queue jumping bus lane (QJBL), is introduced to improve the right of way of bus at an signalized intersection. QJBL just introduces a short bus lane from the stop line to the end of the queues at the intersection. Regardless of the many queues of other traffic at the intersection, QJBL covering the queue length enable bus to enter to the stop line at the intersection. As the results, QJBL increase the capability of the bus mobility without the restricts and with much less cost than that of SBL.<BR>&nbsp;&nbsp;In other to simulate traffic flow along the arterial with three intersections operated by either QJBL or SBL, we assumed three test scenarios varying total traffic volume and bus volume respectively. We examined the effects of the two types of bus lanes above comparing both travel time of bus and that of other traffic resulted from the simulations. The simulation results showed consistent improvements in terms of bus travel time without much increasing that of other traffic. Based from the results of this paper, it can be said that QJBL can be a alternate approach for increasing bus mobility instead of SBL.