Regulations

NHTSA issues Federal Motor Vehicle Safety Standards (FMVSS) to implement laws from Congress. These regulations allow us to fulfill our mission to prevent and reduce vehicle crashes.

100 Results
FMVSS Number Partsort descending Subject Actions
 
121 49 CFR Part 571 Air Brake Systems

Amends the FMVSS on air brake systems to improve the stopping distance performance of truck tractors. The rule requires the vast majority of new heavy truck tractors to achieve a 30 percent reduction in stopping distance compared to currently required levels. For these heavy truck tractors (approximately 99 percent of the fleet), the amended standard requires those vehicles to stop in not more than 250 feet when loaded to their gross vehicle weight rating (GVWR) and tested at a speed of 60 miles per hour (mph). For a small number of very heavy severe service tractors, the stopping distance requirement will be 310 feet under these same conditions. In addition, this final rule requires that all heavy truck tractors must stop within 235 feet when loaded to their “lightly loaded vehicle weight” (LLVW).

Final Rule: Federal Motor Vehicle Safety Standards; Air Brake Systems 391.12 KB Final Rule - partial response to petitions for reconsideration.: Federal Motor Vehicle Safety Standards; Air Brake Systems 61.95 KB
49 CFR Part 571 Occupant Crash Protection

Final Rule
121 49 CFR Part 571 Air Brake Systems

Amends the FMVSS on air brake systems to improve the stopping distance performance of truck tractors. The rule requires the vast majority of new heavy truck tractors to achieve a 30 percent reduction in stopping distance compared to currently required levels. For these heavy truck tractors (approximately 99 percent of the fleet), the amended standard requires those vehicles to stop in not more than 250 feet when loaded to their gross vehicle weight rating (GVWR) and tested at a speed of 60 miles per hour (mph). For a small number of very heavy severe service tractors, the stopping distance requirement will be 310 feet under these same conditions. In addition, this final rule requires that all heavy truck tractors must stop within 235 feet when loaded to their “lightly loaded vehicle weight” (LLVW).

Final Rule: Federal Motor Vehicle Safety Standards; Air Brake Systems 391.12 KB Final Rule - Federal Motor Vehicle Safety Standards; Air Brake Systems 61.95 KB
222 49 CFR Part 571 School Bus Passenger Seating and Crash Protection

Notice of Proposed Rulemaking: Seating Systems, Occupant Crash Protection, Seat Belt Assembly Anchorages, School Bus Passenger Seating and Crash Protection 358.76 KB Final Rule: Occupant Crash Protection, Seat Belt Assembly Anchorages, School Bus Passenger Seating and Crash Protection 921.99 KB
49 CFR Part 571 Child Restraint Anchorage Systems

Final rule, response to petitions for reconsideration
222 49 CFR Part 571 School Bus Passenger Seating and Crash Protection

Final Rule: Seating Systems, Occupant Crash Protection, Seat Belt Assembly Anchorages, School Bus Passenger Seating and Crash Protection 921.99 KB Notice of Proposed Rulemaking: Federal Motor Vehicle Safety Standards; Seating Systems, Occupant Crash Protection, Seat Belt Assembly Anchorages, School Bus Passenger Seating and Crash Protection 358.76 KB
49 CFR Part 571 Head Impact Protection

Final Rule
206 49 CFR Part 571 Door Locks and Door Retention Components and Side Impact Protection

We are proposing to amend Federal Motor Vehicle Safety Standard (FMVSS) No. 206, Door locks and door retention components, in order to add and update requirements and test procedures and to harmonize with the world’s first global technical regulation for motor vehicles.

Laboratory Test Procedure: Door Locks and Door Retention Components 517.39 KB
49 CFR Part 571 Child Restraint Systems

Final Rule
136 49 CFR Part 571 Electronic Stability Control Systems for Heavy Vehicles

This proposes to establish a new Federal Motor Vehicle Safety Standard No. 136 to require electronic stability control (ESC) systems on truck tractors and certain buses with a gross vehicle weight rating of greater than 11,793 kilograms (26,000 pounds). ESC systems in truck tractors and large buses are designed to reduce untripped rollovers and mitigate severe understeer or oversteer conditions that lead to loss of control by using automatic computer-controlled braking and reducing engine torque output. In 2012, we expect that about 26 percent of new truck tractors and 80 percent of new buses affected by this proposed rule will be equipped with ESC systems. We believe that ESC systems could prevent 40 to 56 percent of untripped rollover crashes and 14 percent of loss-of-control crashes. By requiring that ESC systems be installed on truck tractors and large buses, this proposal would prevent 1,807 to 2,329 crashes, 649 to 858 injuries, and 49 to 60 fatalities at less than $3 million per equivalent life saved, while generating positive net benefits.

Notice of Proposed Rulemaking: Federal Motor Vehicle Safety Standards; Electronic Stability Control Systems for Heavy Vehicles 851.39 KB Preliminary Regulatory Impact Analysis: Electronic Stability Control Systems On Heavy Vehicles 896.43 KB
National Highway Traffic Safety Administration Federal Motor Vehicle Safety Standards (FMVSS)

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