If you've driven around Ponca for very long, you've probably seen small temporary signs placed near the road to advertise a yard sale, a mowing service, or a political candidate. But did you know that those signs are often placed illegally? Temporary signs such as wire "yard signs" are not allowed to be placed on City rights-of-way in Ponca. The City of Ponca's sign ordinance has always required that signs be placed on private property and not on City rights-of-way. The ordinance further allows City police to remove signs if they are placed on a right-of-way.
The right-of-way is typically the area of land closest to the street, such as the grass strip between the street and a sidewalk. In addition to potentially being an eye sore, temporary signage can also post potential safety hazards if they block the view of drivers or pedestrians of traffic. Signs must be placed on private property only.
Original source can be found here.