"Trailer" means a vehicle or conveyance with or without motive power designed to be pulled or propelled by a vehicle or other form of power.
"Vehicular advertising device" means any sign, writing, picture, poster, painting, notice, bill, model, display, symbol, emblem, or similar device, which is so designed that it draws the attention of persons in any public street, roadway, or other public place.
HRS § 445-112.5