Evaluating the Relationship Between the Driver and the Roadway to Address Rural Intersection Safety by Using SHRP2 Naturalistic Driving Study Data and the Roadway Information Database
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2024-07-01
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Edition:Final Report
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Abstract:Rural intersections account for 30 percent of all crashes in rural areas and 6 percent of fatal crashes, representing a significant but poorly understood safety problem (Zwerling et al. 2005). The objective of this study was to use second Strategic Highway Research Program Naturalistic Driving Study data and Roadway Information Database data to observe driver behavior at high-speed rural intersections. The overarching goal was to better understand how drivers react at rural intersections. The study’s researchers observed driver behavior firsthand by using video, vehicle and driver kinematic, and roadway data to determine how roadway, driver, environmental, and vehicle factors interact to affect driver safety at rural intersections. The research team conducted various analyses to examine driver behavior at different intersection types: two-way stop-controlled intersections, T-intersections, and all-way stop-controlled intersections. The analyses included the points at which drivers reacted to intersections, stopping behavior at intersections, and driver behavior surrounding safety-critical events. The models showed that several factors influence driver behavior at an intersection, including type of movement through the intersection, presence of a vehicle or vehicles on an opposing or major approach, presence of certain countermeasures, and vehicle speeds upstream of the intersection. The results can ultimately lead to better intersection design, more informed selection of traffic control devices, effective countermeasures, and targeted information to inform policy decisions.
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