Field effectiveness of general motors advanced driver assistance and headlighting systems

•Forward crash-prevention systems were 20%-40% effective at reducing rear-end striking crashes.•Lateral crash-prevention systems were 10–12% effective at preventing lane-departure crashes.•Effectiveness for forward and lateral systems was higher when considering only injury crashes.•All backing systems were effective at reducing backing crashes (range 24–82%).•HID headlamps were 11% effective at reducing key night crashes; auto high beam adds 26% crash reduction.