Any such sign, banner, or advertising matter placed without the consent of the authorities responsible for the maintenance of such public road or highway is hereby declared to be a violation of this act; any such sign or banner so placed shall be and is hereby declared to be a public nuisance and may be abated by the authorities responsible for the maintenance of the public road or highway with or without notice to the party or parties responsible for the placing thereof, and in addition thereto the parties responsible for the placing of such sign, banner, or advertising matter shall for each and every such offense forfeit and pay a sum not less than four dollars ($4.00) nor more than twenty dollars ($20.00). All money collected under the provisions of this act shall be paid into the treasury of the county in which said nuisance was perpetrated, to be used only for the construction or repair of public roads or highways.