Transportation & Communities Summit 2019: Passing through Safely: Design Guidance for Protected Bike Lanes at Intersections
Thursday, September 19, 2019
8:30 a.m. - 10 a.m. PDT
Portland, OR, United States
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Contextual Guidance at Intersections for Protected Bicycle Lanes
Christopher Monsere, Portland State University
Separated bike lanes have become increasingly common around the United States as cities seek to attract the new riders, including the Interested but Concerned demographic of people who want to ride but limit their riding because they do not feel comfortable riding with motor vehicle traffic. Planners and engineers are still struggling with identifying contextually appropriate, safe, and comfortable designs for intersection locations, where bicyclist paths cross the paths of turning vehicles as well as cross-traffic. This presentation summarizes the recently completed NITC project "Contextual Guidance at Intersections for Protected Bicycle Lanes" which employed a combination of user surveys and simulations to anticipate expected bicyclist and turning vehicle interactions and bicyclist comfort based on design type and volumes. Findings suggest that, of the design types tested, bicycle signals and protected intersections have the highest expected comfort.
Safety and Nonoptimal Usage of a Protected Bicycle Intersection -- A before-and-after case study in Salt Lake City, UT
Torrey Lyons, University of Utah
Growth in bicycle trips in the US has increased the demand for infrastructure that safely integrates this mode with motorized users at intersections. Protected bicycle intersections have been implemented across the US and Canada, and the safety of these intersections is just starting to be understood. We examine a protected intersection in Salt Lake City, UT using before and after video analysis. We find changes to nonoptimal behaviors and near collisions in response to the introduction of the intersection configuration.
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