Federal Register #NHTSA-2026-1948

NHTSA Interpretive Rule on Fuel Economy Standards for Commercial Medium- and Heavy-Duty Vehicles

This notice from the Department of Transportation, National Highway Traffic Safety Administration (NHTSA), provides regulatory clarification regarding fuel economy standards for commercial medium- and heavy-duty vehicles and work trucks. - Government Buyer: - Department of Transportation (DOT) - National Highway Traffic Safety Administration (NHTSA) - OEMs and Vendors: - No specific OEMs or vendors are mentioned - Products/Services Requested: - No products or services are requested; this is a regulatory notice - Unique or Notable Requirements: - NHTSA clarifies its authority is limited to setting fuel economy standards for vehicles, not engines - The agency will review and enforce standards based on this interpretation - No procurement activity, solicitation, or award is involved - Additional Details: - The notice is intended to guide future rulemaking and enforcement - No contract, purchase, or vendor engagement is announced

Description

The National Highway Traffic Safety Administration (NHTSA) issued an interpretive rule clarifying its authority to set fuel economy standards for commercial medium- and heavy-duty on-highway vehicles and work trucks. The rule specifies that NHTSA's authority includes setting vehicle standards but does not extend to setting separate standards for engines. NHTSA plans to review existing standards for consistency with this interpretation in a separate rulemaking and will enforce standards according to this interpretation pending that process.

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