Jump to main content or area navigation.

Contact Us

Regulatory Development and Retrospective Review Tracker

Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles - Phase 2

a.k.a. Heavy-duty Vehicles GHG Emissions Standards - Phase 2

RIN: 2060-AS16 (What's this?)

Docket No.: Not yet available (What's this?)

Current Phase: Proposal (What's this?)

During the President's second term, the EPA and the Department of Transportation, in close coordination with the California Air Resources Board, is developing a comprehensive National Program for Medium- and Heavy-Duty Vehicle Greenhouse Gas Emission and Fuel Efficiency Standards for model years beyond 2018.

These second sets of standards would further reduce greenhouse gas emissions and fuel consumption from a wide range of on-road vehicles from semi-trucks to the largest pickup trucks and vans, and all types and sizes of work trucks and buses. This action will be in continued response to the President's directive to take coordinated steps to produce a new generation of clean vehicles. This action follows the first ever Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles (75 FR September 15, 2011).

NPRM: Sent to OMB for Regulatory Review03/27/2015
NPRM: Received by OMB03/27/2015
NPRM: Regulatory Review Concluded06/18/2015
NPRM: Published in FR07/13/2015
NPRM: Comment Period Open07/13/2015
NPRM: Public Meeting08/06/2015
NPRM: Public Meeting08/18/2015
NPRM: Comment Period Extension Published in FR09/08/2015
NPRM: Comment Period Closed09/11/2015
NPRM: Comment Period Closed with Extension10/01/2015
Final Rule: Published in FR07/2016 (projected)

Potential Effects

Federal Government - other agencies
Likely to be involved in the implementation of this rule.

Small Entities
EPA notifies the public when a rulemaking is likely to 1) have any adverse economic impact on small entities even though a Regulatory Flexibility Analysis may not be required and/or 2) have significant adverse economic impacts on a substantial number of small entities. The term "small entities" includes small businesses, small governments, and small not-for-profits. (Read a longer explanation on our Small Entities web page.) This rulemaking is likely to impact small entities in the following way(s):
  • Likely to have any adverse economic impact on:
    • small businesses
  • Likely to have a significant adverse economic impact on a substantial number of these small entities:
    • small businesses

State Governments
Likely to be involved in the implementation of this rule.

Participate / Learn More Regulatory Review

Some of EPA's rulemakings undergo regulatory review (What's this?), as prescribed by Executive Order 12866 and coordinated by the Office of Management and Budget (OMB). The following list describes which of this rulemaking's stages have completed review and published in the Federal Register, if any, and provides links to the review documents where available. Consult the "Timeline" section of this Web page for the dates of each review.

  • NPRM - This stage of the rulemaking underwent review.
Citations & Authorities

Federal Register Citations

Code of Federal Regulations (CFR) Citation
40 CFR 1036 40 CFR 1037 40 CFR 86

Legal Authority
42 U.S.C. 7401 et seq. Clean Air Act


This site provides summaries of priority rulemakings and priority retrospective reviews of existing regulations. We update most of the site at the beginning of each month, though some data is updated more frequently if it is time sensitive. The information on this site is not intended to and does not commit EPA to specific conclusions or actions. For example, after further analysis, EPA may decide the effects of a rule would be different or it may decide to terminate a rulemaking.

Jump to main content.