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

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American Government Topics:  National Highway Traffic Safety Administration

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

Margo Tsirigotis Oge
December 29, 2010

[Federal Register: December 29, 2010 (Volume 75, Number 249)]
[Proposed Rules]               
[Page 81952-81957]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr29de10-34]                         

=======================================================================
-----------------------------------------------------------------------

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 85, 86, 1036, 1037, 1065, 1066, and 1068

DEPARTMENT OF TRANSPORTATION

National Highway Traffic Safety Administration

49 CFR Parts 523, 534, and 535

[EPA-HQ-OAR-2010-0162; FRL-9219-4; NHTSA 2010-0079]
RIN 2060-AP61; RIN 2127-AK74

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

AGENCIES: Environmental Protection Agency (EPA) and National Highway 
Traffic Safety Administration (NHTSA), Department of Transportation 
(DOT).

ACTION: Proposed rules; correction.

-----------------------------------------------------------------------

SUMMARY: NHTSA and EPA published in the Federal Register of November 
30, 2010, proposed 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 vehicles. That document inadvertently 
contained some incorrect fuel consumption values in NHTSA-specific 
tables in the preamble that resulted from using an incorrect conversion 
factor for determining CO2 emissions to equivalent fuel 
consumption for gasoline fuel. That document also contained some 
rounding errors in NHTSA-specific tables in the preamble. This document 
corrects the rounding errors by adopting a uniform rounding approach 
for all fuel consumption equivalents for those NHTSA-specific tables 
and makes the appropriate corrections to the conversions.

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

SUPPLEMENTARY INFORMATION: NHTSA and EPA published in the Federal 
Register of November 30, 2010, proposed 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 vehicles. 
That document inadvertently contained some incorrect fuel consumption 
values in NHTSA-specific tables in the preamble that resulted from 
using an incorrect conversion factor for determining CO2 
emissions to equivalent fuel consumption for gasoline fuel. The correct 
values that should have been used in the document are a factor of 1,018 
grams of CO2 per gallon of diesel for conversion of diesel 
fuel, and a factor of 8,887 grams of CO2 per gallon of 
gasoline for gasoline.
    That document also contained some rounding errors in NHTSA-specific 
tables in the preamble. This document corrects the rounding errors by 
adopting a uniform rounding approach for all fuel consumption 
equivalents and makes the

[[Page 81953]]

appropriate corrections to the conversions. These changes are made to 
several NHTSA-specific tables and in several places in the NHTSA-
specific text of the preamble. The proposed regulatory text for both 
NHTSA and EPA is not affected.
    In FR Doc. 2010-28120, appearing on page 74152 in the Federal 
Register of Tuesday, November 30, 2010, the following corrections are 
made:
    1. On page 74176, correct Table II-1 and accompanying footnote 39 
by revising them to read as follows:

               Table II-1--Heavy-Duty Combination Tractor Emissions and Fuel Consumption Standards
----------------------------------------------------------------------------------------------------------------
                                                                              Day cab               Sleeper cab
                                                                 -----------------------------------------------
                                                                      Class 7         Class 8         Class 8
----------------------------------------------------------------------------------------------------------------
                                     2014 Model Year CO2 Grams per Ton-Mile
----------------------------------------------------------------------------------------------------------------
Low Roof........................................................             104              79              65
Mid Roof........................................................             104              79              70
High Roof.......................................................             118              87              73
----------------------------------------------------------------------------------------------------------------
                          2014-2016 Model Year Gallons of Fuel per 1,000 Ton-Mile \39\
----------------------------------------------------------------------------------------------------------------
Low Roof........................................................            10.2             7.8             6.4
Mid Roof........................................................            10.2             7.8             6.9
High Roof.......................................................            11.6             8.5             7.2
----------------------------------------------------------------------------------------------------------------
                                     2017 Model Year CO2 Grams per Ton-Mile
----------------------------------------------------------------------------------------------------------------
Low Roof........................................................             103              78              64
Mid Roof........................................................             103              78              69
High Roof.......................................................             116              86              71
----------------------------------------------------------------------------------------------------------------
                               2017 Model Year Gallons of Fuel per 1,000 Ton-Mile
----------------------------------------------------------------------------------------------------------------
Low Roof........................................................            10.1             7.7             6.3
Mid Roof........................................................            10.1             7.7             6.8
High Roof.......................................................            11.4             8.4             7.0
----------------------------------------------------------------------------------------------------------------

    2. On page 74194,  correct Tables II-7 and II-8 by revising them to 
read as follows:
---------------------------------------------------------------------------

    \39\ Manufacturers may voluntarily opt-in to the NHTSA fuel 
consumption program in 2014 or 2015. If a manufacturer opts-in, the 
program becomes mandatory. See Section I.B.5 for more information 
about NHTSA's voluntary opt-in program for MYs 2014 and 2015.

                  Table II-2--Coefficients for Proposed HD Pickup and Van Target Standards \74\
----------------------------------------------------------------------------------------------------------------
                         Model year                                a            b            c            d
----------------------------------------------------------------------------------------------------------------
Diesel Vehicles:
    2014....................................................       0.0478          368     0.000470         3.61
    2015....................................................       0.0474          366     0.000466         3.60
    2016....................................................       0.0460          354     0.000452         3.48
    2017....................................................       0.0445          343     0.000437         3.37
    2018 and later..........................................       0.0416          320     0.000409         3.14
Gasoline Vehicles:
    2014....................................................       0.0482          371     0.000542         4.17
    2015....................................................       0.0479          369     0.000539         4.15
    2016....................................................       0.0469          362     0.000528         4.07
    2017....................................................       0.0460          354     0.000518         3.98
    2018 and later..........................................       0.0440          339     0.000495         3.81
----------------------------------------------------------------------------------------------------------------


 Table II-3--Coefficients Proposed for NHTSA's First Alternative and EPA's Alternative HD Pickup and Van Target
                                                    Standards
----------------------------------------------------------------------------------------------------------------
                         Model year                                a            b            c            d
----------------------------------------------------------------------------------------------------------------
Diesel Vehicles:
    2014 \a\................................................       0.0478          368     0.000470         3.61
    2015 \a\................................................       0.0474          366     0.000466         3.60
    2016-2018...............................................       0.0440          339     0.000432         3.33
    2019 and later..........................................       0.0416          320     0.000409         3.14
Gasoline Vehicles:
    2014 \a\................................................       0.0482          371     0.000542         4.17
    2015 \a\................................................       0.0479          369     0.000539         4.15

[[Page 81954]]


    2016-2018...............................................       0.0456          352     0.000513         3.96
    2019 and later..........................................       0.0440          339     0.000495         3.81
----------------------------------------------------------------------------------------------------------------

    3. On page 74202, correct Table II-11 by revising it to read as 
follows:
---------------------------------------------------------------------------

    \74\ The NHTSA proposal provides voluntary standards for model 
years 2014 and 2015. Target line functions for 2016-2018 are for the 
second NHTSA alternative described in Section II.C(d)(ii).

              Table II-4--Proposed Vocational Diesel Engine Standards Over the Heavy-Duty FTP Cycle
----------------------------------------------------------------------------------------------------------------
                                                                                           Medium
                Model year                             Standard            Light heavy-  heavy-duty  Heavy heavy-
                                                                           duty diesel     diesel    duty diesel
----------------------------------------------------------------------------------------------------------------
2014-2016.................................  CO2 Standard (g/bhp-hr)......          600          600          567
                                            Voluntary Fuel Consumption            5.89         5.89         5.57
                                             Standard (gallon/100 bhp-hr).
2017 and Later............................  CO2 Standard (g/bhp-hr)......          576          576          555
                                            Fuel Consumption (gallon/100          5.66         5.66         5.45
                                             bhp-hr).
----------------------------------------------------------------------------------------------------------------

    4. On page 74202, in the third column, correct the first sentence 
of the first complete paragraph by revising it to read as follows: 
``The baseline 2010 model year CO2 performance of these 
heavy-duty gasoline engines over the Heavy-duty FTP cycle is 660 g 
CO2/bhp-hr (7.43 gal/100 bhp-hr) in 2010 based on non-GHG 
certification data provided to EPA by the manufacturers.''
    5. On page 74202, in the third column, correct the first sentence 
of the second complete paragraph by revising it to read as follows: 
``NHTSA is proposing a 7.06 gallon/100 bhp-hr standard for fuel 
consumption while EPA is proposing a 627 g CO2/bhp-hr 
standard tested over the Heavy-duty FTP, effective in the 2016 model 
year.''
    6. On page 74220, correct Table III-2 by revising it to read as 
follows:

                                     Table III-5--Class 7 and 8 Tractor Baseline CO2 Emissions and Fuel Consumption
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                Class 7                                                    Class 8
                                  ----------------------------------------------------------------------------------------------------------------------
                                                Day cab                           Day cab                                 Sleeper cab
                                  ----------------------------------------------------------------------------------------------------------------------
                                     Low/mid roof      High roof       Low/mid roof      High roof         Low roof         Mid roof        High roof
--------------------------------------------------------------------------------------------------------------------------------------------------------
CO2 (grams CO2/ton-mile).........            111              130               84               96               76               81               89
Fuel Consumption (gal/1,000 ton-              10.9             12.8              8.3              9.4              7.5              8.0              8.6
 mile)...........................
--------------------------------------------------------------------------------------------------------------------------------------------------------

    7. On page 74225, correct Table III-6 by revising it to read as 
follows:


                                            Table III-6--Proposed 2014 and 2017 Model Year Tractor Reductions
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                Class 7                                                    Class 8
                                  ----------------------------------------------------------------------------------------------------------------------
                                                Day cab                           Day cab                                 Sleeper cab
                                  ----------------------------------------------------------------------------------------------------------------------
                                     Low/mid roof      High roof       Low/mid roof      High roof         Low roof         Mid roof        High roof
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                     2014 Model Year
--------------------------------------------------------------------------------------------------------------------------------------------------------
2014 MY Voluntary Fuel                        10.2             11.6              7.8              8.5              6.4              6.9              7.2
 Consumption Standard (gallon/
 1,000 ton-mile).................

[[Page 81955]]


2014 MY CO2 Standard (grams CO2/             104              118               79               87               65               70               73
 ton-mile).......................
Percent Reduction................             6%               9%               6%               9%              15%              14%              18%
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                     2017 Model Year
--------------------------------------------------------------------------------------------------------------------------------------------------------
2017 MY Fuel Consumption Standard             10.1             11.4              7.7              8.4              6.3              6.8              7.0
 (gallon/1,000 ton-mile).........
2017 MY CO2 Standard (grams CO2/             103              116               78               86               64               69               71
 ton-mile).......................
Percent Reduction................             7%              11%               7%              10%              16%              15%              20%
--------------------------------------------------------------------------------------------------------------------------------------------------------

    8. On page 74244, correct Table III-12 by revising it to read as 
follows:

                              Table III-7--Baseline Vocational Vehicle Performance
----------------------------------------------------------------------------------------------------------------
                                                                            Vocational vehicle
                                                        --------------------------------------------------------
                                                          Light heavy-duty  Medium heavy-duty   Heavy heavy-duty
----------------------------------------------------------------------------------------------------------------
Fuel Consumption Baseline (gallon/1,000 ton-mile)......               37.5               22.3               11.3
CO2 Baseline (grams CO2/ton-mile)......................              382                227                115
----------------------------------------------------------------------------------------------------------------

    9. On page 74245, correct Table III-14 by revising it to read as 
follows:

                    Table III-8--Proposed Vocational Vehicle Standards and Percent Reductions
----------------------------------------------------------------------------------------------------------------
                                                                            Vocational vehicle
                                                        --------------------------------------------------------
                                                          Light heavy-duty  Medium heavy-duty   Heavy heavy-duty
----------------------------------------------------------------------------------------------------------------
2016 MY Fuel Consumption Standard (gallon/1,000 ton-                  35.2               20.8               10.7
 mile).................................................
2017 MY Fuel Consumption Standard (gallon/1,000 ton-                  33.8               20.0               10.5
 mile).................................................
2014 MY CO2 Standard (grams CO2/ton-mile)..............              358                212                109
2017 MY CO2 Standard (grams CO2/ton-mile)..............              344                204                107
Percent Reduction from 2010 baseline in 2014 MY........               6%                 7%                 5%
Percent Reduction from 2010 baseline in 2017 MY........              10%                10%                 7%
----------------------------------------------------------------------------------------------------------------


[[Page 81956]]

    10. On page 74245, in the third column, correct the second sentence 
of the third paragraph by revising it to read as follows: ``The 
agencies are projecting a 100% application rate of this technology 
package to the heavy-duty gasoline engines, which results in a 
CO2 standard of 627 g/bhp-hr and a fuel consumption standard 
of 7.06 gallon/100 bhp-hr.''
    11. On page 74440, correct Table 1 by revising it to read as 
follows:

     Table 1--Equation Coefficients for Vehicle Configuration Target
                                Standards
------------------------------------------------------------------------
                  Model year                         c            d
------------------------------------------------------------------------
                  Alternative 1--Fixed Target Standards
------------------------------------------------------------------------
Compression-Ignition Vehicle Coefficients for Model Years 2016 and Later
------------------------------------------------------------------------
2016 through 2018.............................     0.000432         3.33
2019 and later................................     0.000409         3.14
------------------------------------------------------------------------
   Spark-Ignition Vehicle Coefficients for Model Years 2016 and Later
------------------------------------------------------------------------
2016 through 2018.............................     0.000513         3.96
2019 and later................................     0.000495         3.81
------------------------------------------------------------------------
 Alternative 2--Phased-in Target Standards Compression-Ignition Vehicle
               Coefficients for Model Years 2016 and Later
------------------------------------------------------------------------
2016..........................................     0.000452         3.48
2017..........................................     0.000437         3.37
2018 and later................................     0.000409         3.14
------------------------------------------------------------------------
   Spark-Ignition Vehicle Coefficients for Model Years 2016 and Later
------------------------------------------------------------------------
2016..........................................     0.000528         4.07
2017..........................................     0.000518         3.98
2018 and later................................     0.000495         3.81
------------------------------------------------------------------------

    12. On page 74442, correct Table 2 by revising it to read as 
follows:

  Table 2--Voluntary Compliance Equation Coefficients for Vehicle Fuel
                          Consumption Standards
------------------------------------------------------------------------
                  Model year                         c            d
------------------------------------------------------------------------
  Compression-Ignition Vehicle Coefficients for Voluntary Compliance in
                      Model Years 2013 Through 2015
------------------------------------------------------------------------
2013 and 14...................................     0.000470         3.61
2015..........................................     0.000466         3.60
------------------------------------------------------------------------
  Spark-Ignition Vehicle Coefficients for Voluntary Compliance in Model
                         Years 2013 Through 2015
------------------------------------------------------------------------
2013 and 14...................................     0.000542         4.17
2015..........................................     0.000539         4.15
------------------------------------------------------------------------

    13. On page 74444, correct Table 4 by revising it to read as 
follows:

            Table 4--Truck Tractor Fuel Consumption Standards
------------------------------------------------------------------------
                                            Day cab          Sleeper cab
     Regulatory subcategories     --------------------------------------
                                     Class 7      Class 8      Class 8
------------------------------------------------------------------------
  Fuel Consumption Standards (gallons per 1000 ton-miles) Effective for
                       Model Years 2017 and Later
------------------------------------------------------------------------
Low Roof.........................         10.1          7.7          6.3
Mid Roof.........................         10.1          7.7          6.8
High Roof........................         11.4          8.4          7.0
------------------------------------------------------------------------
  Fuel Consumption Standards (gallons per 1000 ton-miles) Effective for
                        Model Years 2013 to 2016
------------------------------------------------------------------------
Low Roof.........................         10.2          7.8          6.4
Mid Roof.........................         10.2          7.8          6.9
High Roof........................         11.6          8.5          7.2
------------------------------------------------------------------------

    14. On page 74445, correct Table 5 by revising it to read as 
follows:

                                                          Table 5--Heavy-Duty Engine Standards
--------------------------------------------------------------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                   Fuel Consumption Standards (gallons per 100 bhp-hr)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Regulatory subcategory            Light heavy-duty    Medium heavy-duty compression-ignition
                                   compression-                        engine
                                   ignition engine.
                                   Heavy heavy-duty compression-ignition  Spark-ignition....
                                                   engine                 engines...........
--------------------------------------------------------------------------------------------------------------------------------------------------------
Truck Application...............  Vocational........  Vocational........  Tractor...........  Vocational........  Tractor...........  All.
Effective Model Years...........                                            2017 and later                                            2016 and later.
Fuel Consumption Standard.......  5.66..............  5.66..............  4.78..............  5.45..............  4.52..............  7.06.
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                      Fuel Consumption Standards for Voluntary Compliance (gallons per 100 bhp-hr)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Regulatory subcategory            Light heavy-duty        Medium heavy-duty diesel engine
                                   diesel engine.
                                      Heavy heavy-duty diesel engine      Spark-ignition....
                                                                          engine............
--------------------------------------------------------------------------------------------------------------------------------------------------------
Truck Application...............  Vocational........  Vocational........  Tractor...........  Vocational........  Tractor...........  All.
Effective Model Years...........                                           2013 through 2016                                          2013 through 2015.

[[Page 81957]]


Voluntary Fuel Consumption        5.89..............  5.89..............  4.93..............  5.57..............  4.67..............  7.06.
 Standard.
--------------------------------------------------------------------------------------------------------------------------------------------------------


    Issued: December 20, 2010.
Joseph S. Carra,
Acting Associate Administrator for Rulemaking, National Highway Traffic 
Safety Administration, Department of Transportation.
    Issued: December 20, 2010.
Margo Tsirigotis Oge,
Director, Office of Transportation Air Quality, Environmental 
Protection Agency.
[FR Doc. 2010-32726 Filed 12-28-10; 8:45 am]
BILLING CODE 4910-59-P



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