Rule Summary

The U.S. Environmental Protection Agency (EPA) and the Department of Transportation’s National Highway Traffic Safety Administration (NHTSA)  jointly proposed a national program to establish the next phase of greenhouse gas (GHG) emissions and fuel efficiency standards for medium- and heavy-duty vehicles. This “Phase 2 program” would significantly reduce carbon emissions and improve the fuel efficiency of heavy-duty vehicles, helping to address the challenges of global climate change and energy security.

You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.

• Proposed Rule (PDF)(629 pp, 5.2 MB, July 13, 2015)

Related Materials

Fact Sheet

• Cutting Carbon Pollution, Improving Fuel Efficiency, Saving Money, and Supporting Innovation for Trucks (PDF)(3 pp, 130 K, EPA-420-F-15-900, June 2015)
• EPA and NHTSA Propose Standards to Reduce Greenhouse Gas Emissions and Improve Fuel Efficiency of Medium- and Heavy-Duty Vehicles for Model Year 2018 and Beyond (PDF)(6 pp, 139 K, EPA-420-F-15-901, June 2015)
• EPA and NHTSA Propose Greenhouse Gas and Fuel Efficiency Standards for Medium- and Heavy-Duty Trucks: By the Numbers (PDF)(3 pp, 515 K, EPA-420-F-15-903, June 2015)

Frequently Asked Questions

• Proposed EPA and NHTSA Regulation of Commercial Trailers Used with Combination Tractors (PDF)(4 pp, 508 K, EPA-420-F-15-902, June 2015)
• Frequently Asked Questions about Heavy-Duty “Glider Vehicles” and “Glider Kits” (PDF)(5 pp, 581 K, EPA-420-F-15-904, July 2015)

Other

• Draft Regulatory Impact Analysis (PDF)(971 pp, 8.5 MB, EPA-420-D-15-900, June 2015)
• Notice of Data Availability (5 pp, 224 K, March 2016)