The following words, terms and phrases, when used in this article, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning: Motor vehicle means every vehicle which is self-propelled. School means the Mayville Community School District, Tuscola and Lapeer Counties. School property means all real property owned or leased by the Mayville Community School District, Tuscola and Lapeer Counties, situated within the village. Street and roadway mean that portion of a street or highway improved, designed or ordinarily used for vehicular travel, located upon the real property of the Mayville Community School District, Tuscola and Lapeer Counties, situated within the village. Vehicle means every device in, upon or by which any person or property is or may be transported or drawn upon a highway, specifically including every device propelled by human power. (Comp. Ords. 1987, § 20.552) Cross reference— Definitions generally, § 1-2.