NHTSA: Federal Motor Vehicle Safety Standards; Bus Rollover Structural Integrity
SUMMARY: NHTSA is issuing this final rule to establish Federal Motor Vehicle Safety Standard (FMVSS) No. 227, “Bus rollover structural integrity,” to enhance the rollover structural integrity of over-the-road buses (motorcoaches), and other buses with a gross vehicle weight rating (GVWR) greater than 11,793 kilograms (kg) (26,000 pounds (lb)). This final rule, issued pursuant to the Moving Ahead for Progress in the 21st Century Act (MAP-21), requires the buses to provide a “survival space” in a rollover test to protect occupants from possible collapse of the bus structure around them. In addition, to reduce the likelihood of ejection, this final rule prohibits emergency exits from opening in the rollover test. This final rule ensures that bus roofs and side wall panels will resist deformation and intrusion into the occupant space in rollover crashes, and reduces the risk of emergency exits becoming ejection portals in a crash.
DATES: The effective date of this final rule is: December 30, 2024. Optional early compliance is permitted. Published in the Federal Register December 29, 2021, page 74270.
View final rule.
§571.227 Standard No. 227; Bus rollover structural integrity. | ||
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