NHTSA Medium- and Heavy-Duty Fuel Economy Program
Current understanding
To be populated as evidence accumulates.
Evidence log
- 2026-08-31 — Resetting NHTSA’s Fuel Economy Program: Commercial Medium- and Heavy-Duty On-Highway Vehicles and Work Trucks: NHTSA final rule (2025) reinterprets EISA §32902(k) to authorize fuel-economy standards only for complete commercial medium- and heavy-duty vehicles and work trucks, disclaims authority over standalone engine standards, and announces it will not enforce existing engine-only standards while rewriting the program. (novelty: 3)
Open questions
Related
Contributing findings
Resetting NHTSA's Fuel Economy Program: Commercial Medium- and Heavy-Duty On-Highway Vehicles and Work Trucks
31-aug-2026
novelty 3
per-area 3
weakens