TCRP Project A-39, “Improving Transportation Network Efficiency Through Implementation of Transit-Supportive Roadway Strategies,” conducted an extensive review of transitpreferential treatments used in the United States and internationally, including information on when these treatments are applied and how they are designed. The researchers interviewed a number of transit and roadway agencies to identify lessons observed and effective practices from actual project implementations, with a particular focus on successful techniques for transit agencies, roadway agencies, and project stakeholders to work together toward outcomes that benefit all parties involved. The project presents findings from a series of gapfilling research efforts on (1) innovative international strategies not yet in common use in the United States; (2) a simulation study of the effects of stop location, transit signal priority, and queue jumps on bus and general traffic travel times and travel time variability; (3) an evaluation of selected strategies implemented in the Seattle area; and (4) identifying conditions when the delay benefit produced by a strategy at an upstream intersection is lost at the next downstream signal, resulting in no net benefit. Finally, the research report identifies possible changes to the next edition of AASHTO’s Guide for Geometric Design of Transit Facilities on Highways and Streets, based on the findings of this project. This project created three products that are available on the TRB website (www.TRB.org) by searching for “TCRP Report 183”: (1) this guidebook, (2) a research report on the methodology used to develop the guidebook (TCRP Web-Only Document 66), and (3) a PowerPoint presentation describing the entire project. (Author/publisher)
Samenvatting