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Person-Based Evaluation of Transit Preferential Treatments on Signalized Arterials

TitlePerson-Based Evaluation of Transit Preferential Treatments on Signalized Arterials
Publication TypeConference Paper
Year of Publication2014
AuthorsFarid YZ, Christofa E, Collura J
Conference NameTransportation Research Board 93rd Annual Meeting
Date Published01/2014
PublisherTransportation Research Board
Conference LocationWashington, D.C.
Accession Number 01520091
Other NumbersPaper No: 14-2995
KeywordsArterial highways, Bus priority, Bus transit, Evaluation and assessment, Signalized intersections, Traffic congestion

Efficient public transportation has the potential to relieve traffic congestion and improve overall transportation system performance. In order to improve transit service, Transit Preferential Treatments (TPT) are often deployed to give transit vehicles priority over other vehicles at an intersection or along a corridor. Examples of such treatments are exclusive bus lanes, queue jumper lanes, and signal priority strategies. The objective of this paper is to perform a person-based evaluation of alternative TPTs when considered individually and in combination. An analytical model is developed to assess person delay and person discharge flow of the alternative TPTs at each of the intersections of a signalized arterial. The performance of the TPTs is evaluated using both the analytical model and through simulation tests on a four-intersection segment of San Pablo Avenue in Berkeley, CA. Results indicate that the analytical model produces outcomes that are comparable with the simulation results and therefore it is concluded that the analytical model may be used for a quantitative evaluation of TPTs without the need for time consuming and data intensive simulations. Overall, space priority treatments were found to introduce noticeable benefits to transit users. Negative impacts were observed to the auto users only when a lane was substituted for a bus lane where it led to oversaturated conditions. Changes in person discharge flow were not significant for any of the treatments tested with the exception of the bus lane substitution with and without green extension, which led to significant decrease in person discharge flow.