OPTIMIZE SIGNAL PRIORITY STRATEGY TO IMPROVE TRANSIT MOBILITY

摘要

In this research we studied the impact of Transit Signal Priority (TSP) on the Transit busrnmobility. For the purpose of experiment we have chosen 111Street corridor in Edmonton.rnRecently the Light Rail Transit (LRT) extension was carried out and the LRT passes through thisrnintersection. What is peculiar to this intersection is that a shopping mall, the LRT and transit busrnstations are all located close-by. Moreover, the transit buses have to cross the LRT tracks forrnentry and exit from the station. For the purpose of analysis and optimizing the LRT crossingrnsignals, we used the Ring Barrier Controller (RBC) and Vehicle Actuated Programming (VAP)rnin VISSIM. The three options explored were (a) LRT preemption, (b) LRT prediction priority (c)rnLRT/Transit Bus priority. In options (b) and (c), the arrival time of the LRT is predicted inrnadvance and the signal phases are modified to ensure uninterrupted passage of the LRT. Thisrnleads to better performance, as there is lesser number of signal changes compared to the firstrnoption. In the absence of dedicated bus lanes option (b) was found to be most beneficial.