Abstract: A system and method for displaying digital messages and images on a flat screen on the back and sides of a moving vehicle using GPS with an antenna, controller with a memory, wireless receiver and transmitter for communicating with an external controller. The system has software programmed to change the display based upon a geo-fenced area. The display may have a section for displaying brake lights and turn signals and public announcements. The system may have a vehicle counter to determine the number of potential viewers of the display on the flat screen in order to establish a rate for an advertiser to pay per thousand potential viewers.