§571.221. Standard No. 221; School bus body joint strength. — Inbound Citations

(2) Buses with 7 or fewer designated seating positions rearward of the driver's seating position that are forward-facing or can convert to forward-facing without the use of tools.

S4. Definitions.

Occupant compartment means a space within the vehicle interior intended for driver and passenger use, excluding any space occupied by fixed appliances such as bars, kitchenettes, or toilets.

Over-the-road bus means a bus characterized by an elevated passenger deck located over a baggage compartment.

Prison bus means a bus manufactured for the purpose of transporting persons subject to involuntary restraint or confinement and has design features consistent with that purpose.

School bus is defined in § 571.3.

School bus derivative bus means a bus that meets Federal motor vehicle safety standards for school buses regarding emergency exits (§ 571.217), rollover protection (§ 571.220), bus body joint strength (§ 571.221), and fuel system integrity (§ 571.301).

Stop-request system means a vehicle-integrated system for passenger to use to signal to a vehicle operator that they are requesting a stop.

Survival space means all points within a three-dimensional space in the occupant compartment as defined within the following volume:

(29) ASTM E8-89, “Standard Test Methods of Tension Testing of Metallic Materials,” approved May 15, 1989, into § 571.221.