An automotive safety feature that alerts drivers when a vehicle is coming up from behind at a fast clip but has not yet reached their side view mirrors. A blind spot alert is also sounded when the turn signal indicator is employed and a car is in the blind spot. Cars employ both radar and LIDAR for blind spot monitoring. See
automotive safety systems and
LIDAR.
Blind Spot Information (BSI) System
In this 2017 Honda CR-V example, icons on both side mirrors flash whenever radar underneath the rear bumpers detect a vehicle entering the blind spot. If the turn signal is on, an audible alert is also provided.