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

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URL: https://www.frixlaw.com/law-library/documents/fr%3A2010-32726

## Record

- **Collection:** Federal Register
- **Document type:** Proposed Rule
- **Published:** December 29, 2010
- **Citation:** 75 FR 81952

## Text

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 CO
2
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 CO
2
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 CO
2
per gallon of diesel for conversion of diesel fuel, and a factor of 8,887 grams of CO
2
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

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
Class 7
Class 8
Sleeper cab
Class 8

2014 Model Year CO
2
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 CO
2
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

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

Model year
Standard

Light
heavy-duty
diesel

Medium heavy-duty diesel
Heavy heavy-duty diesel

2014-2016

CO
2
Standard (g/bhp-hr)

600
600
567

Voluntary Fuel Consumption Standard (gallon/100 bhp-hr)
5.89
5.89
5.57

2017 and Later

CO
2
Standard (g/bhp-hr)

576
576
555

Fuel Consumption (gallon/100 bhp-hr)
5.66
5.66
5.45

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 CO
2
performance of these heavy-duty gasoline engines over the Heavy-duty FTP cycle is 660 g CO
2
/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 CO
2
/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 CO
2
Emissions and Fuel Consumption

Class 7
Day cab
Low/mid roof
High roof
Class 8
Day cab
Low/mid roof
High roof
Sleeper cab
Low roof
Mid roof
High roof

CO
2
(grams CO
2
/ton-mile)

111
130
84
96
76
81
89

Fuel Consumption (gal/1,000 ton-mile)
10.9
12.8
8.3
9.4
7.5
8.0
8.6

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 7
Day cab
Low/mid roof
High roof
Class 8
Day cab
Low/mid roof
High roof
Sleeper cab
Low roof
Mid roof
High roof

2014 Model Year

2014 MY Voluntary Fuel Consumption Standard (gallon/1,000 ton-mile)
10.2
11.6
7.8
8.5
6.4
6.9
7.2

2014 MY CO
2
Standard (grams CO
2
/ton-mile)

104
118
79
87
65
70
73

Percent Reduction
6%
9%
6%
9%
15%
14%
18%

2017 Model Year

2017 MY Fuel Consumption Standard (gallon/1,000 ton-mile)
10.1
11.4
7.7
8.4
6.3
6.8
7.0

2017 MY CO
2
Standard (grams CO
2
/ton-mile)

103
116
78
86
64
69
71

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

CO
2
Baseline (grams CO
2
/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-mile)
35.2
20.8
10.7

2017 MY Fuel Consumption Standard (gallon/1,000 ton-mile)
33.8
20.0
10.5

2014 MY CO
2
Standard (grams CO
2
/ton-mile)

358
212
109

2017 MY CO
2
Standard (grams CO
2
/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%

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 CO
2
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

Regulatory subcategories
Day cab
Class 7
Class 8
Sleeper cab
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 compression-ignition engine
Medium heavy-duty compression-ignition engine
Heavy heavy-duty compression-ignition engine

Spark-ignition
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 diesel engine
Medium heavy-duty 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.

Voluntary Fuel Consumption Standard
5.89
5.89
4.93
5.57
4.67
7.06.

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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Source: Frix Law Library, https://www.frixlaw.com/law-library/documents/fr%3A2010-32726. Public record. Not legal advice.