Data / Federal rules / 2026-17756
Resetting NHTSA's Fuel Economy Program: Commercial Medium- and Heavy-Duty On-Highway Vehicles and Work Trucks
The National Highway Traffic Safety Administration published this final rule in the Federal Register on August 31, 2026.
SpecStream is the live web data engine for teams and agents. It reads every rule and proposed rule in the Federal Register each morning, and this page is that reading. Name your industry once and new rules, comment deadlines and effective dates arrive in your sheet, CRM, Slack or agent as they are published.
What the agency says
The National Highway Traffic Safety Administration is issuing this interpretive rule regarding the scope of its authority to set fuel economy standards for commercial medium- and heavy-duty on-highway vehicles and work trucks. This rule describes NHTSA's authority to set vehicle standards, which does not include the authority to set separate standards for engines. NHTSA will review its existing standards applicable to commercial medium- and heavy-duty on-highway vehicles and work trucks for consistency with this interpretation in a separate rulemaking. Pending the rulemaking process, NHTSA will exercise its enforcement authority with regard to affected standards in accordance with the interpretation set forth in this rule.
Key facts
- Document number
- 2026-17756
- Type
- Final rule
- Action
- Interpretive rule
- Agency
- Transportation Department; National Highway Traffic Safety Administration
- Published
- August 31, 2026
- Dates
- This interpretive rule is applicable as of August 31, 2026.
- Docket
- Docket No. NHTSA-2026-1948
- Code of Federal Regulations
- 49 CFR 523; 49 CFR 534; 49 CFR 535
- Pages
- 6
Other documents from the National Highway Traffic Safety Administration
Everything from the National Highway Traffic Safety Administration · Published in August 2026
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.