KKK-B-1579 Buses, Motor: School, With High Headroom, 20-, 28-, 36-, 44-, 58- Passenger, Two-Wheel DriveThis specification covers gasoline and diesel, engine driven, high headroom, two wheel drive school buses. Buses shall have an engine mounted partially \(snub nose\) or completely forward of the windshield. Vehicles procured under this specification are commercial items which shall be warranted \(by a single prime contractor\) as specified in 6.4 or in procurement documents.