Signal Timing Calculation Model of Transit Signal Priority using Shockwave Theory
충격파 이론을 이용한 대중교통 우선신호의 신호시간 산정모형

Sang Sup Park, Hye Rim Cho, Youngchan Kim, Youngje Jeong
2015 Journal of the Korean Society of Civil Engineers  
This research suggested the traffic signal calculation model of active transit signal priority using a shockwave model. Using this signal priority timing optimization model, the shockwave area is computed under the condition of Early Green and Green Extension among active transit signal priority techniques. This study suggested the speed estimation method of backward shockwave using average travel time and intersection passing time. A shockwave area change is calculated according to signal
more » ... ding to signal timing change of transit signal priority. Moreover, this signal timing calculation model could determine the optimal signal priority timings to minimize intersection delay of general vehicles. A micro simulation analysis using VISSIM and its user application model ComInterface was applied. This study checked that this model could calculate the signal timings to minimize intersection delay considering saturation condition of traffic flow. In case studies using an isolated intersection, this study checked that this model could improve general vehicle delay of more over ten percentage as compared with equality reduction strategy of non-priority phases. Recently, transit priority facilities are spreading such as tram, BRT and median bus lane in Korea. This research has an important significance in that the proposed priority model is a new methodology that improve operation efficiency of signal intersection.
doi:10.12652/ksce.2015.35.4.0897 fatcat:l3h7momicbhjzfibxary3gd7di