Abstract: A mobile visual display system including one or more vehicles, and equipped with an external display panel and an internal display panel, capable of delivering changeable messages e.g., LED, liquid crystal, etc., and a programmable on-board controller CPU, which drives the display panels to provide a viewable message. The controller CPU ascertains that the vehicle is within a predefined geographic zone, which can be customized for each message and drives external display to generate a message selected for public viewing. The message is displayed on external display, pursuant to a schedule stored on a database, which includes date, time of day and display duration while the vehicle is within the zone or until the vehicle is located in another zone which is not within the message schedule.