Steve:

Check with your local authorities about being able to have ads on those billboards. It's one thing to have a blank billboard there, it is another to have an ad on that billboard.

Down here in the land that time forgot - or the a**hole end of the world as one of our former leaders lovingly called us - advertising rates are based on the number of people who pass the sign. The more people who pass the sign the higher the rate.

Also, the rate includes creation of the ad (printing it up, not designing it) and pasting it onto the billboard.

Michael Ross