A light ECU in a light control device performs a display process of obtaining speed limit information at a current position of the driver's vehicle on a road and of instructing a pixel light system to display the speed limit information on the surface of the road. The light control device can project the speed limit information for the drivers vehicle onto the road. Further, the light control device judges whether or not the vehicle speed information is not less than a predetermined reference speed, and performs the process of displaying the vehicle speed information on the road only when the vehicle speed information is not less than a predetermined reference speed. The above control process displays the vehicle speed information on the road only when necessary, allows the driver of the vehicle only to recognize important information, and provides the driver of the vehicle with safer driving conditions.