Vehicular Sign. A "vehicular sign" includes any name, insignia, logo, or sign displayed, mounted, painted or otherwise placed on a trailer, truck, automobile, or other vehicle that is parked, placed, or stored so that the vehicular sign is visible from a public street or right-of-way, or that is parked, placed, or stored for the purpose of displaying advertising signage. A company car or vehicle no larger than a one-ton pickup bearing one (1) name, insignia, logo, or sign displayed, mounted, painted or otherwise placed shall be exempted.