CAFE - Corporate Average Fuel Economy

New standards for CAFE increase the fuel economy of vehicles.

Learn More

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 Part Subject Actions
 
226 49 CFR Parts 571, 585 Ejection Mitigation

This final rule establishes a new Federal Motor Vehicle Safety Standard No. 226, "Ejection Mitigation" to reduce the partial and complete ejection of vehicle occupants through side windows in crashes, particularly rollover crashes. The standard applies to the side windows next to the first three rows of seats, and to a portion of the cargo area behind the first or second rows, in motor vehicles with a gross vehicle weight rating (GVWR) of 4,536 kilogram (kg) or less (10,000 pounds (lb) or less). To assess compliance, the agency is adopting a test in which an impactor is propelled from inside a test vehicle toward the windows. The ejection mitigation safety system is required to prevent the impactor from moving more than a specified distance beyond the plane of a window.

Final Rule: Ejection Mitigation; Phase-In Reporting Requirements; Incorporation by Reference 1.45 MB
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
NHTSA: 49 CFR Parts 531, 533, and 537; EPA: 40 CFR Parts 86 and 600 Establish Light-Duty Vehicle Greenhouse Gas Emission Standards and CAFE Standards

EPA and NHTSA are issuing this joint proposal to establish a National Program consisting of new standards for light-duty vehicles that will reduce greenhouse gas emissions and improve fuel economy. EPA is proposing greenhouse gas emissions standards under the Clean Air Act, and NHTSA is proposing Corporate Average Fuel Economy standards under the Energy Policy and Conservation Act, as amended. These standards apply to passenger cars, light-duty trucks, and medium-duty passenger vehicles, covering model years 2012 through 2016, and represent a harmonized and consistent National Program. Under the National Program, automobile manufacturers would be able to build a single light-duty national fleet that satisfies all requirements under both programs while ensuring that consumers still have a full range of vehicle choices.

Draft Environmental Impact Statement: Corporate Average Fuel Economy Standards, Passenger Cars and Light Trucks, Model Years 2012-2016 5.66 MB Notice of Upcoming Joint Rulemaking to Establish Vehicle GHG Emissions and CAFE Standards 343.9 KB Preliminary Regulatory Impact Analysis: Corporate Average Fuel Economy for MY 2012-MY 2016 Passenger Cars and Light Trucks 2.51 MB Draft Joint Technical Support Document: Proposed Rulemaking to Establish Light-Duty Vehicle Greenhouse Gas Emission Standards and Corporate Average Fuel Economy Standards 1.96 MB Notice of Proposed Rulemaking: Proposed Rulemaking to Establish Light-Duty Vehicle Greenhouse Gas Emission Standards and Corporate Average Fuel Economy Standards 3.55 MB
49 CFR Part 563 Event Data Recorders

EDRs in Vehicles

Notice of Proposed Rulemaking
49 CFR Part 563 Event Data Recorders (EDRs)

Final Regulatory Evaluation: Event Data Recorders (EDRs) 461.76 KB Final rule: Event Data Recorders 677.72 KB Frequently Asked Questions and Additional Information about Event Data Recorders (EDRs) 109.42 KB
49 CFR Part 563 Event Data Recorders -- Final Rule; response to petitions for reconsideration

NOTE: In Table III of this document, the accuracy specification for the "Frontal air bag deployment, time to deploy/first stage, driver" should read +/- 2 ms. We have determined that the missing number is a typographical error that is not present in the originally signed notice. A correction notice to fix this error will soon be published in the Federal Register.

Final Rule: Event Data Recorders 253.86 KB
214 595 Exemption From the Make Inoperative

Exemption From the Make Inoperative Prohibition; Final Rule 2.38 MB
208 49 CFR Part 595 Exemption from the Make Inoperative Prohibition

Final Rule: Exemption From the Make Inoperative Prohibition 171.91 KB Notice of proposed rulemaking
121 49 CFR, Part 571 Federal Motor Vehicle Safety Standard; Air Brake Systems

Regarding trailers with antilock brake systems being equipped with an external antilock malfunction indicator lamp

Interim Final Rule, Federal Motor Vehicle Safety Standard; Air Brake Systems 73.52 KB Notice of Proposed Rulemaking: Federal Motor Vehicle Safety Standard; Air Brake Systems 77.33 KB
49 CFR Part 571 Federal Motor Vehicle Safety Standards: Low Speed Vehicles

Final Rule
National Highway Traffic Safety Administration Federal Motor Vehicle Safety Standards (FMVSS)

NHTSA on the Federal Register

View notices, proposed rules and final rules NHTSA administers. Also respond to requests for comment.