Forward collision warning systems that alert drivers when a rear-end crash is imminent, and automatic emergency braking systems that apply the brakes when drivers do not intervene, are effective countermeasures to prevent rear-end crashes. This study examined the effectiveness of forward collision alert (a forward collision warning system) and front automatic braking (an automatic emergency braking system) on rear-end striking crashes among vehicles from an original equipment manufacturer (OEM). Crash and exposure data from a variety of U.S. states were also used in this study to develop a regression model to understand the effectiveness of the technologies in reducing the crashes with various severity levels.
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