Question School buses: Answers Are never equipped with ABS. Are only equipped with ABS if located in cold climates. May be equipped with ABS. Explanation Most commercial vehicles manufactured after 1998 or 1999 are required to be equipped with Anti-Lock Braking Systems (ABS). Many older buses are also equipped with ABS. Take a FREE Practice Test Now This questions appears in the following tests: New Hampshire Bus , Ohio Bus , Oklahoma Bus , Virginia Bus ,