Skip to Content

Proposed Rule

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

Document Details

Information about this document as published in the Federal Register.

Published Document

This document has been published in the Federal Register. Use the PDF linked in the document sidebar for the official electronic format.

Start Preamble

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.

Start Further Info

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.

End Further Info End Preamble Start Supplemental Information

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 Start Printed Page 81953appropriate 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 cabSleeper cab
Class 7Class 8Class 8
2014 Model Year CO2 Grams per Ton-Mile
Low Roof1047965
Mid Roof1047970
High Roof1188773
2014-2016 Model Year Gallons of Fuel per 1,000 Ton-Mile 39
Low Roof10.27.86.4
Mid Roof10.27.86.9
High Roof11.68.57.2
2017 Model Year CO2 Grams per Ton-Mile
Low Roof1037864
Mid Roof1037869
High Roof1168671
2017 Model Year Gallons of Fuel per 1,000 Ton-Mile
Low Roof10.17.76.3
Mid Roof10.17.76.8
High Roof11.48.47.0

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

Table II-2—Coefficients for Proposed HD Pickup and Van Target Standards 74

Model yearabcd
Diesel Vehicles:
20140.04783680.0004703.61
20150.04743660.0004663.60
20160.04603540.0004523.48
20170.04453430.0004373.37
2018 and later0.04163200.0004093.14
Gasoline Vehicles:
20140.04823710.0005424.17
20150.04793690.0005394.15
20160.04693620.0005284.07
20170.04603540.0005183.98
2018 and later0.04403390.0004953.81

Table II-3—Coefficients Proposed for NHTSA's First Alternative and EPA's Alternative HD Pickup and Van Target Standards

Model yearabcd
Diesel Vehicles:
2014 a0.04783680.0004703.61
2015 a0.04743660.0004663.60
2016-20180.04403390.0004323.33
2019 and later0.04163200.0004093.14
Gasoline Vehicles:
2014 a0.04823710.0005424.17
2015 a0.04793690.0005394.15
Start Printed Page 81954
2016-20180.04563520.0005133.96
2019 and later0.04403390.0004953.81

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

Table II-4—Proposed Vocational Diesel Engine Standards Over the Heavy-Duty FTP Cycle

Model yearStandardLight heavy-duty dieselMedium heavy-duty dieselHeavy heavy-duty diesel
2014-2016CO 2 Standard (g/bhp-hr)600600567
Voluntary Fuel Consumption Standard (gallon/100 bhp-hr)5.895.895.57
2017 and LaterCO 2 Standard (g/bhp-hr)576576555
Fuel Consumption (gallon/100 bhp-hr)5.665.665.45

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 7Class 8
Day cabDay cabSleeper cab
Low/mid roofHigh roofLow/mid roofHigh roofLow roofMid roofHigh roof
CO2 (grams CO2/ton-mile)1111308496768189
Fuel Consumption (gal/1,000 ton-mile)10.912.88.39.47.58.08.6

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 7Class 8
Day cabDay cabSleeper cab
Low/mid roofHigh roofLow/mid roofHigh roofLow roofMid roofHigh roof
2014 Model Year
2014 MY Voluntary Fuel Consumption Standard (gallon/1,000 ton-mile)10.211.67.88.56.46.97.2
Start Printed Page 81955
2014 MY CO2 Standard (grams CO2/ton-mile)1041187987657073
Percent Reduction6%9%6%9%15%14%18%
2017 Model Year
2017 MY Fuel Consumption Standard (gallon/1,000 ton-mile)10.111.47.78.46.36.87.0
2017 MY CO2 Standard (grams CO2/ton-mile)1031167886646971
Percent Reduction7%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-dutyMedium heavy-dutyHeavy heavy-duty
Fuel Consumption Baseline (gallon/1,000 ton-mile)37.522.311.3
CO2 Baseline (grams CO2/ton-mile)382227115

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-dutyMedium heavy-dutyHeavy heavy-duty
2016 MY Fuel Consumption Standard (gallon/1,000 ton-mile)35.220.810.7
2017 MY Fuel Consumption Standard (gallon/1,000 ton-mile)33.820.010.5
2014 MY CO2 Standard (grams CO2/ton-mile)358212109
2017 MY CO2 Standard (grams CO2/ton-mile)344204107
Percent Reduction from 2010 baseline in 2014 MY6%7%5%
Percent Reduction from 2010 baseline in 2017 MY10%10%7%
Start Printed 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 yearcd
Alternative 1—Fixed Target Standards
Compression-Ignition Vehicle Coefficients for Model Years 2016 and Later
2016 through 20180.0004323.33
2019 and later0.0004093.14
Spark-Ignition Vehicle Coefficients for Model Years 2016 and Later
2016 through 20180.0005133.96
2019 and later0.0004953.81
Alternative 2—Phased-in Target Standards Compression-Ignition Vehicle Coefficients for Model Years 2016 and Later
20160.0004523.48
20170.0004373.37
2018 and later0.0004093.14
Spark-Ignition Vehicle Coefficients for Model Years 2016 and Later
20160.0005284.07
20170.0005183.98
2018 and later0.0004953.81

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 yearcd
Compression-Ignition Vehicle Coefficients for Voluntary Compliance in Model Years 2013 Through 2015
2013 and 140.0004703.61
20150.0004663.60
Spark-Ignition Vehicle Coefficients for Voluntary Compliance in Model Years 2013 Through 2015
2013 and 140.0005424.17
20150.0005394.15

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

Table 4—Truck Tractor Fuel Consumption Standards

Regulatory subcategoriesDay cabSleeper cab
Class 7Class 8Class 8
Fuel Consumption Standards (gallons per 1000 ton-miles) Effective for Model Years 2017 and Later
Low Roof10.17.76.3
Mid Roof10.17.76.8
High Roof11.48.47.0
Fuel Consumption Standards (gallons per 1000 ton-miles) Effective for Model Years 2013 to 2016
Low Roof10.27.86.4
Mid Roof10.27.86.9
High Roof11.68.57.2

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 subcategoryLight heavy-duty compression-ignition engineMedium heavy-duty compression-ignition engineHeavy heavy-duty compression-ignition engineSpark-ignition engines
Truck ApplicationVocationalVocationalTractorVocationalTractorAll.
Effective Model Years2017 and later2016 and later.
Fuel Consumption Standard5.665.664.785.454.527.06.
Fuel Consumption Standards for Voluntary Compliance (gallons per 100 bhp-hr)
Regulatory subcategoryLight heavy-duty diesel engineMedium heavy-duty diesel engineHeavy heavy-duty diesel engineSpark-ignition engine
Truck ApplicationVocationalVocationalTractorVocationalTractorAll.
Effective Model Years2013 through 20162013 through 2015.
Start Printed Page 81957
Voluntary Fuel Consumption Standard5.895.894.935.574.677.06.
Start Signature

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.

End Signature End Supplemental Information

Footnotes

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.

Back to Citation

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).

Back to Citation

[FR Doc. 2010-32726 Filed 12-28-10; 8:45 am]

BILLING CODE 4910-59-P