Graduate Thesis Or Dissertation
 

Impact of Bicycle Rolling Stop Laws on Safety-Relevant Behaviors in the Pacific Northwest

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/3b591h897

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  • Previous research has found some bicyclists disregard circular red indications and stop signs. Possible justifications include a desire to increase safety, save energy, save time, and increase visibility. Because of this, many bicyclists feel as though stopping at stop signs, especially in the absence of conflicting vehicular traffic, is an undue hinderance to travel, resulting in slower speeds, increased instability, greater exposure to conflicting vehicles, and physical discomfort when motion resumes after stopping. Bicycle Rolling Stop (BRS) laws refer to legislation that allows bicyclists to treat stop signs as yield signs. Many states have passed or attempted to pass similar legislation with varying permissive actions for bicyclists in response to stop signs. Previous research has focused on crash data analysis and motivating factors of bicyclists performing a rolling stop in areas where illegal. There is no available research that identifies behaviors related to safety and the implementation of the Bicycle Rolling Stop law. To that end, this research utilized networked driving and bicycling simulators to examine the impacts of different road treatments (i.e., dedicated bike lane and shared roadway) and conflicting movements of a vehicle and bicycle to evaluate the safety implications of the BRS law. Sixty participants successfully completed a networked simulator experiment where a “live interaction” occurred at a stop-controlled intersection between a participant in the driving simulator and a participant in the bicycling simulator. Participants encountered 16 scenarios while riding or driving in the simulators. Time-space diagrams demonstrated that after education related to the BRS law, bicyclists preferred to yield at stop signs and had a higher average speed through intersections. Analysis of bicycling participant eye-movements found that more attention was allocated to conflicting passenger cars after education of the BRS law. Driving participants trajectories showed that drivers approached intersections either slower or at a similar speed after education of the BRS law. Live interactions in the networked simulators validated results where bicycling participants interacted with virtually controlled passenger cars. This research provides bicycle advocacy groups, transportation agencies, and decision makers with information to support future legislative decisions, programming educational initiatives, and designing enforcement practices regarding BRS laws.
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  • Pending Publication
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  • 2022-09-06 to 2023-10-07

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