Advanced crash avoidance technologies include some clear success stories when it comes to preventing crashes, insurance claim analyses by the Highway Loss Data Institute (HLDI) show. Forward collision avoidance systems, particularly those that can brake autonomously, along with adaptive headlights, which shift direction as the driver steers, show the biggest crash reductions. Lane departure warning appears to hurt, rather than help, though it’s not clear why, and other systems, such as blind spot detection and park assist, aren’t showing clear effects on crash patterns yet.