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Under the special procedures for calculating the fuel economy of those vehicles contained in AMFA, alternative and dual fueled vehicles are assigned a higher fuel economy value for CAFE purposes, which can result in manufacturers earning credits for their fleets. This final rule extends the incentive created by the Alternative Motor Fuels Act of 1988 (AMFA) to encourage the continued production of motor vehicles capable of operating on alternative fuels for four additional model years covering model years (MY) 2005 to MY 2008.
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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).įinal Rule: Federal Motor Vehicle Safety Standards Air Brake Systems, Final Rule - Federal Motor Vehicle Safety Standards Air Brake Systemsįinal Rule: Federal Motor Vehicle Safety Standards Air Brake Systems, Final Rule - partial response to petitions for reconsideration.: Federal Motor Vehicle Safety Standards Air Brake SystemsĪutomobile Fuel Economy Manufacturing Incentives for Alternative Fueled Vehicles For a small number of very heavy severe service tractors, the stopping distance requirement will be 310 feet under these same conditions. 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). 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. Amends the FMVSS on air brake systems to improve the stopping distance performance of truck tractors.