“Ambulance” means a privately or publicly owned motor vehicle for highway use that is specially designed or constructed and equipped, and is intended to be used for and is maintained or operated for the transportation of persons who are sick, injured, wounded, or otherwise incapacitated or helpless, including dual purpose police patrol cars and funeral coaches or hearses, and which is equipped according to section 7 of Act No. 258 of the Public Acts of 1968, as amended, being section 257.1207 of the Michigan Compiled Laws.