US Patent 10592916 Vehicle-mounted, motion-controlled sign

A system configured to be mounted to a vehicle, the system including a display viewable over a predetermined range of distances and a motion sensor configured to detect speeds of one or more vehicles within the predetermined range of distances of the display. The system may receive, via the motion sensor, the speeds of the one or more vehicles and based at least in part on the speeds of the one or more vehicles relative to a threshold speed may display first image data or second image data.