Todd - we do not allow any signs in the public ROW except those placed by governmental entities (i.e. City or state). We have had several challenges to our ordinance and the key is for your sign ordinance to be content neutral. Allowing signs in the right of way for some commercial activities (i.e. real estate) and not others could be be a problem. For what it is worth, I have attached a copy of the sign section of our zoning ordinance. Feel free to have your city attorney call our city attorney if you need more info.