Analysis of Near Crashes Among Teen, Young Adult, and Experienced Adult Drivers Using the SHRP2 Naturalistic Driving Study

Analysis of Near Crashes Among Teen, Young Adult, and Experienced Adult Drivers Using the SHRP2 Naturalistic Driving Study
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Published on 2018 by


ABSTRACT: Objective : Motor vehicle crashes are the leading cause of death among young drivers. Though previous research has focused on crash events, near crashes offer additional data to help identify driver errors that could potentially lead to crashes as well as evasive maneuvers used to avoid them. The Strategic Highway Research Program 2 (SHRP2) Naturalistic Driving Study (NDS) contains extensive data on real-world driving and offers a reliable methodology to quantify and study near crashes. This article presents findings on near crashes and how they compare to crash events among teen, young adult, and experienced adult drivers. Methods : A subset from the SHRP2 database consisting of 1, 653 near crashes for teen (16–19years, n = 550), young adult (20–24years, n = 748), and experienced adult (35–54years, n = 591) drivers was used. Onboard instrumentation including scene cameras, accelerometers, and Global Positioning System logged time series data at 10Hz. Scene videos were reviewed for all events to classify near crashes based on 7 types: rear-end, road departure, intersection, head-on, side-swipe, pedestrian/cyclist, and animal. Near crash rates, incident type, secondary tasks, and evasive maneuvers were compared across age groups and between crashes and near crashes. For rear-end near crashes, vehicle dynamic variables including near crash severity, headway distance, time headway, and time to collision at the time of braking were compared across age groups. Crashes and near crashes were combined to compare the frequency of critical events across age. Results : Teen drivers exhibited a significantly higher ( P

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