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DOT/NHTSA RIN: 2127-AK74 Publication ID: Spring 2011 
Title: Commercial Medium- and Heavy-Duty On-Highway Vehicles and Work Truck Fuel Efficiency Standards 
Abstract: This rulemaking would respond to requirements of the Energy Policy and Conservation Act, as amended by the Energy Independence and Security Act of 2007. The statute requires that rulemaking begin with a report by the National Academy of Sciences evaluating medium-duty and heavy-duty truck fuel economy standards. The National Academy provided Congress and NHTSA with this report on March 18, 2010. EISA then requires that NHTSA complete a study that examines the fuel efficiency of commercial medium- and heavy-duty on-highway vehicles and work trucks and determines the appropriate test procedures and methodologies for measuring the fuel efficiency of such vehicles, the appropriate metric for measuring the fuel efficiency of such vehicles, the range of factors that affect the fuel efficiency of these vehicles, and other factors that could impact a program to improve the fuel efficiency of these vehicles. The NHTSA study was issued October 25, 2010. Once that study is completed, NHTSA has 24 months to complete a final rule establishing a fuel efficiency program for these vehicles. The law provides that the new standards must provide at least 4 full model years of regulatory leadtime and 3 full model years of regulatory stability (i.e., the standards must remain in effect for 3 years before they may be amended). On May 21, 2010, President Obama issued a memorandum directing NHTSA and EPA conduct a joint rulemaking (NHTSA regulating fuel efficiency and EPA regulating greenhouse gas emissions), and to issue a final rule by July 30, 2011. 
Agency: Department of Transportation(DOT)  Priority: Economically Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: Yes  Unfunded Mandates: Private Sector 
CFR Citation: 49 CFR 535    49 CFR 523    49 CFR 534   
Legal Authority: 49 USC 32902    delegation of authority at 49 CFR 1.50   
Legal Deadline:
Action Source Description Date
Other  Statutory  NHTSA Study  09/30/2010 
Final  Statutory  Final rule  09/28/2012 
Action Date FR Cite
NPRM  11/30/2010  75 FR 74151   
NPRM Comment Period End  01/31/2011    
Final Rule  08/00/2011    
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Energy Effects: Statement of Energy Effects planned as required by Executive Order 13211.  Included in the Regulatory Plan: No 
International Impacts: This regulatory action will be likely to have international trade and investment effects, or otherwise be of international interest.
RIN Information URL:   Public Comment URL:  
RIN Data Printed in the FR: No 
Related RINs: Related to 2060-AP61 
Agency Contact:
James Tamm
Fuel Economy Division Chief
Department of Transportation
National Highway Traffic Safety Administration
1200 New Jersey Avenue SE,
Washington, DC 20590
Phone:202 493-0515