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

Topics:  National Highway Traffic Safety Administration

Christopher J. Bonanti
Federal Register
September 28, 2011

[Federal Register Volume 76, Number 188 (Wednesday, September 28, 2011)]
[Rules and Regulations]
[Page 59922]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-24978]


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DEPARTMENT OF TRANSPORTATION

National Highway Traffic Safety Administration

49 CFR Part 535

[NHTSA 2010-0079; EPA-HQ-OAR-2010-0162; FRL-9455-1]
RIN 2127-AK74


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

AGENCY: National Highway Traffic Safety Administration (NHTSA), 
Department of Transportation (DOT).

ACTION: Correcting amendments.

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SUMMARY: This document contains corrections to the final rule 
regulations (49 CFR 535.6), which were published in the Federal 
Register of Thursday, September 15, 2011 (76 FR 57106). The regulations 
established fuel efficiency standards for medium- and heavy-duty 
engines and vehicles, as prescribed under the Energy Independence and 
Security Act (49 U.S.C. 32902(k)(2)).

DATES: Effective Date: November 14, 2011.

FOR FURTHER INFORMATION CONTACT: Lily Smith, Office of Chief Counsel, 
National Highway Traffic Safety Administration, 1200 New Jersey Avenue, 
SE., Washington, DC 20590. Telephone: (202) 366-2992.

SUPPLEMENTARY INFORMATION: 

Background

    NHTSA and EPA published in the Federal Register of September 15, 
2011, final rules to establish a comprehensive Heavy-Duty National 
Program that will increase fuel efficiency and reduce greenhouse gas 
emissions for on-road heavy-duty vehicles, responding to the 
President's directive on May 21, 2010, to take coordinated steps to 
produce a new generation of clean heavy-duty vehicles.

Need for Correction

    As published, the final regulations inadvertently contained 
incorrect conversion factors for determining fuel consumption values 
that resulted from a typographical error. The correct value that should 
have been used in the document is a factor of 8,887 grams of 
CO2 per gallon of gasoline for conversion of gasoline fuel. 
The preamble text is not affected.

List of Subjects in 49 CFR Part 535

    Fuel efficiency.

    Accordingly, 49 CFR part 535 is corrected by making the following 
correcting amendments:

PART 535--MEDIUM- AND HEAVY-DUTY VEHICLES

0
1. The authority citation for part 535 continues to read as follows:

    Authority: 49 U.S.C. 32902; delegation of authority at 49 CFR 
1.50.


0
2. Revise paragraphs (a)(4)(ii) and (c)(4)(ii) of Sec.  535.6 to read 
as follows:


Sec.  535.6  Measurement and calculation procedures.

* * * * *
    (a) * * *
    (4) * * *
    (ii) Calculate the equivalent fuel consumption test group results 
as follows for spark-ignition vehicles and alternative fuel spark-
ignition vehicles. CO2 emissions test group result (grams 
per mile)/8,887 grams per gallon of gasoline fuel) x (10\2\) = Fuel 
consumption test group result (gallons per 100 mile).
* * * * *
    (c) * * *
    (4) * * *
    (ii) Calculate equivalent fuel consumption FCL values for spark-
ignition engines and alternative fuel spark-ignition engines. 
CO2 FCL value (grams per bhp-hr)/8,887 grams per gallon of 
gasoline fuel) x (10\2\) = Fuel consumption FCL value (gallons per 100 
bhp-hr).
* * * * *

    Issued: September 22, 2011.
Christopher J. Bonanti,
Associate Administrator for Rulemaking, National Highway Traffic Safety 
Administration, Department of Transportation.
[FR Doc. 2011-24978 Filed 9-27-11; 8:45 am]
BILLING CODE 4910-59-P