The present invention relates to the determining of a refresh rate of a dynamic billboard. A system in accordance with an embodiment of the present invention includes: a system for obtaining traffic flow information; a system for determining the refresh rate per minute of the dynamic billboard based on the traffic flow information, wherein the refresh rate is equal to 60 mph/V, wherein V is equal to an average velocity in miles per hour of vehicles passing the dynamic billboard; a system for determining a percent change in the traffic flow information over a predetermined period of time, and comparing the percent change in the traffic flow information to a predetermined threshold value; and a system for changing a display provided by the dynamic bill board in accordance with the refresh rate only if a magnitude of the percent change in the traffic flow information is greater than the predetermined threshold value.