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Across the U.S, walking trips are increasing. However, pedestrians still face significantly higher delays than motor vehicles at signalized intersections due to traditional signal timing practices of prioritizing vehicular movements. This study explores pedestrian delay reduction methods via development of a pedestrian priority algorithm that selects an operational plan favorable to pedestrian service, provided a user defined volume threshold has been met for the major street. This algorithm, along with several operational scenarios, were analyzed with VISSIM using Software-In-The-Loop (SITL) simulation to determine the impact these strategies have on user delays. One of the operational scenarios examined was that of actuating a portion of the coordinated phase, or actuated-coordinated operation. Following a discussion on platoon dispersion and the application of it in the design of actuated-coordinated signal timing parameters, a sensitivity analysis was performed on vehicle extension timers to explore the impact that this coordinated movement parameter has on user delay. In the scenario analysis, it was shown that employing fully actuated (also known as Free) operation, either with the designed algorithm or without was an effective method of reducing minor street pedestrian delay while also decreasing average intersection vehicle delay for the volumes used in the simulation. The vehicle extension sensitivity analysis showed that shortening the extension timer of an actuated-coordinated phase can reduce the minor street pedestrian delay without increasing overall vehicle delay, which could be a tool used by agencies while in coordinated operation to prioritize pedestrians.
Andy is a master's student completing his degree in civil engineering with a transportation focus at Portland State. He is passionate about pedestrian and bicycle transportation and hopes to use his knowledge and skills to help build the sustainable future.
Pedestrians -- United States -- Attitudes, Signalized intersections -- Research -- United States, Traffic flow -- Research
Transportation | Urban Studies and Planning
Kading, Andrew, "Managing User Delay with a Focus on Pedestrian Operations" (2016). TREC Friday Seminar Series. 85.