Visual Search Patterns and Behavior of Left Turning Bicyclists at Roadway Intersections: A Field Study Public

http://ir.library.oregonstate.edu/concern/honors_college_theses/8c97ks39t

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  • This research effort considers bicyclist’s left-turn behavior at roadway intersections with varying levels of traffic control; specifically, seeking to address the question where do bicyclists look to acquire information. A demographic comparison was made to determine if factors such as gender or experience influence the nature of how a bicyclist navigates left-turns. Eighteen research participants were outfitted with a mobile-eye tracking device that recorded their visual search patterns at each intersection. After acquiring the data, characteristics such as total number of glances, time from intersection of first glance backwards, and others were extracted and compared with the demographics. It was determined that different intersection designs (signalized vs. unsignalized) influenced the visual search patterns of bicyclists. Bicyclists also look left more often than right when they are turning left at an unsignlaized intersection that does not have a stop sign. While approaching an intersection with on-street parking on both sides, bicyclists significantly reduced their total number of glances back due to the restricted width of the road. Bicyclists exhibited more caution at signalized intersections when compared with unsignalized intersections. There were no statistically significant differences amongst experience and gender.
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