Document ID: EPA-HQ-OAR-2006-0612-0053
Agency: epa
Document Type: Rule
Title: Transportation Conformity Rule Amendments To Implement Provisions Contained in the 2005 Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU)
Posted Date: 2008-01-24T05:00Z

[Federal Register: January 24, 2008 (Volume 73, Number 16)]
[Rules and Regulations]               
[Page 4419-4441]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr24ja08-33]                         

[[Page 4419]]

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Part IV

Environmental Protection Agency

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40 CFR Parts 51 and 93

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Transportation Conformity Rule Amendments To Implement Provisions 
Contained in the 2005 Safe, Accountable, Flexible, Efficient 
Transportation Equity Act: A Legacy for Users (SAFETEA-LU); Final Rule

[[Page 4420]]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 51 and 93

[EPA-HQ-OAR-2006-0612; FRL-8516-6]
RIN 2060-AN82

 
Transportation Conformity Rule Amendments To Implement Provisions 
Contained in the 2005 Safe, Accountable, Flexible, Efficient 
Transportation Equity Act: A Legacy for Users (SAFETEA-LU)

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: In this action, EPA is amending the transportation conformity 
rule to finalize provisions that were proposed on May 2, 2007. The 
Clean Air Act requires federally supported transportation plans, 
transportation improvement programs, and projects to be consistent with 
(``conform to'') the purpose of the state air quality implementation 
plan. Most of these amendments are necessary to make the rule 
consistent with Clean Air Act section 176(c) as amended by SAFETEA-LU 
on August 10, 2005 (Pub. L. 109-59), including changes to the 
regulations to reflect that the Clean Air Act now provides more time 
for state and local governments to meet conformity requirements, 
provides a one-year grace period before the consequences of not meeting 
certain conformity requirements apply, allows the option of shortening 
the timeframe of conformity determinations, and streamlines other 
provisions. This final rule also includes minor amendments that are not 
related to SAFETEA-LU, such as allowing the Department of 
Transportation (DOT) to make categorical hot-spot findings for 
appropriate projects in carbon monoxide nonattainment and maintenance 
areas.
    EPA has consulted with DOT, and they concur with this final rule.

DATES: Effective Date: This final rule is effective on February 25, 
2008.

ADDRESSES: EPA has established a docket for this action under Docket ID 
No. EPA-HQ-OAR-2006-0612. All documents in the docket are listed on the 
http://www.regulations.gov Web site. Although listed in the index, some 

information is not publicly available, e.g., confidential business 
information (CBI) or other information whose disclosure is restricted 
by statute. Certain other material, such as copyrighted material, is 
not placed on the Internet and will be publicly available only in hard 
copy form. Publicly available docket materials are available either 
electronically through http://www.regulations.gov or in hard copy at the Air 

Docket, EPA/DC, EPA West Building, Room 3334, 1301 Constitution Ave., 
NW., Washington, DC. The Public Reading Room is open from 8:30 a.m. to 
4:30 p.m., Monday through Friday, excluding legal holidays. The 
telephone number for the Public Reading Room is (202) 566-1744, and the 
telephone number for the Air Docket is (202) 566-1742.

FOR FURTHER INFORMATION CONTACT: Laura Berry, State Measures and 
Conformity Group, Transportation and Regional Programs Division, 
Environmental Protection Agency, 2000 Traverwood Road, Ann Arbor, MI 
48105, e-mail address: berry.laura@epa.gov, telephone number: (734) 
214-4858, fax number: (734) 214-4052, or Rudy Kapichak, State Measures 
and Conformity Group, Transportation and Regional Programs Division, 
Environmental Protection Agency, 2000 Traverwood Road, Ann Arbor, MI 
48105, e-mail address: kapichak.rudolph@epa.gov, telephone number: 
(734) 214-4574, fax number: (734) 214-4052.

SUPPLEMENTARY INFORMATION: The contents of this preamble are listed in 
the following outline:

I. General Information
II. Background
III. Frequency of Conformity Determinations
IV. Deadline for Conformity Determinations When a New Budget Is 
Established
V. Lapse Grace Period
VI. Timeframes for Conformity Determinations
VII. Conformity SIPs
VIII. Transportation Control Measure Substitutions and Additions
IX. Categorical Hot-Spot Findings for Projects in Carbon Monoxide 
Nonattainment and Maintenance Areas
X. Removal of Regulation 40 CFR 93.109(e)(2)(v)
XI. Miscellaneous Revisions
XII. Statutory and Executive Order Reviews

I. General Information

A. Does This Action Apply to Me?

    Entities potentially regulated by the conformity rule are those 
that adopt, approve, or fund transportation plans, programs, or 
projects under title 23 U.S.C. or title 49 U.S.C. Regulated categories 
and entities affected by today's action include:

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           Category                  Examples of regulated entities
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Local government.............  Local transportation and air quality
                                agencies, including metropolitan
                                planning organizations (MPOs).
State government.............  State transportation and air quality
                                agencies.
Federal government...........  Department of Transportation (Federal
                                Highway Administration (FHWA) and
                                Federal Transit Administration (FTA)).
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    This table is not intended to be exhaustive, but rather provides a 
guide for readers regarding entities likely to be affected by this 
final rule. This table lists the types of entities of which EPA is 
aware that potentially could be regulated by the transportation 
conformity rule. Other types of entities not listed in the table could 
also be regulated. To determine whether your organization is regulated 
by this action, you should carefully examine the applicability 
requirements in 40 CFR 93.102. If you have questions regarding the 
applicability of this action to a particular entity, consult the 
persons listed in the preceding FOR FURTHER INFORMATION CONTACT 
section.

B. How Can I Get Copies of This Document?

1. Docket
    EPA has established an official public docket for this action under 
Docket ID No. EPA-HQ-OAR-2006-0612. You can get a paper copy of this 
Federal Register document, as well as the documents specifically 
referenced in this action, any public comments received, and other 
information related to this action at the official public docket. See 
ADDRESSES section for its location.
2. Electronic Access
    You may access this Federal Register document electronically 
through EPA's Transportation Conformity Web site at http://www.epa.gov/otaq/stateresources/transconf/index.htm.
 You may also access this 

document electronically under the Federal Register listings at http://www.epa.gov/fedrgstr/
.

    An electronic version of the official public docket is available 
through http://www.regulations.gov. You may use

[[Page 4421]]

http://www.regulations.gov to view public comments, access the index listing 

of the contents of the official public docket, and access those 
documents in the public docket that are available electronically. Once 
in the system, select ``search,'' then key in the appropriate docket 
identification number.
    Certain types of information are not placed in the electronic 
public docket. Information claimed as CBI and other information for 
which disclosure is restricted by statute is not available for public 
viewing in the electronic public docket. EPA's policy is that 
copyrighted material is not placed in the electronic public docket but 
is available only in printed, paper form in the official public docket.
    To the extent feasible, publicly available docket materials will be 
made available in the electronic public docket. When a document is 
selected from the index list in EPA Dockets, the system will identify 
whether the document is available for viewing in the electronic public 
docket. Although not all docket materials may be available 
electronically, you may still access any of the publicly available 
docket materials through the docket facility identified in Section 
I.B.1. above. EPA intends to work towards providing electronic access 
in the future to all of the publicly available docket materials through 
the electronic public docket.
    For additional information about the electronic public docket, 
visit the EPA Docket Center homepage at http://www.epa.gov/epahome/dockets.htm
.

II. Background

A. What Is Transportation Conformity?

    Transportation conformity is required under Clean Air Act section 
176(c) (42 U.S.C. 7506(c)) to ensure that federally supported highway 
and transit project activities are consistent with (``conform to'') the 
purpose of the state air quality implementation plan (SIP). Conformity 
currently applies to areas that are designated nonattainment and those 
redesignated to attainment after 1990 (``maintenance areas'' with plans 
developed under Clean Air Act section 175A) for the following 
transportation-related criteria pollutants: Ozone, particulate matter 
(PM2.5 and PM10),\1\ carbon monoxide (CO), and 
nitrogen dioxide (NO2). Conformity to the purpose of the SIP 
means that transportation activities will not cause or contribute to 
new air quality violations, worsen existing violations, or delay timely 
attainment of the relevant national ambient air quality standards 
(NAAQS or ``standards'').
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    \1\ 40 CFR 93.102(b)(1) defines PM2.5 and 
PM10 as particles with an aerodynamic diameter less than 
or equal to a nominal 2.5 and 10 micrometers, respectively.
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    EPA's transportation conformity rule establishes the criteria and 
procedures for determining whether transportation activities conform to 
the SIP. EPA first promulgated the transportation conformity rule on 
November 24, 1993 (58 FR 62188), and subsequently published several 
other amendments. See EPA's Web site at http://www.epa.gov/otaq/stateresources/transconf/index.htm
 for further information.

B. Why Are We Issuing This Final Rule?

    On August 10, 2005, the Safe, Accountable, Flexible, Efficient 
Transportation Equity Act: A Legacy for Users (SAFETEA-LU) was signed 
into law (Pub. L. 109-59). SAFETEA-LU section 6011 amended Clear Air 
Act section 176(c) by:
     Changing the required frequency of transportation 
conformity determinations from three years to four years;
     Providing two years to determine conformity after new SIP 
motor vehicle emissions budgets are either found adequate, approved or 
promulgated;
     Adding a one-year grace period before the consequences of 
a conformity lapse apply;
     Providing an option for reducing the time period addressed 
by conformity determinations;
     Streamlining requirements for conformity SIPs; and
     Providing procedures for areas to use in substituting or 
adding transportation control measures (TCMs) to approved SIPs.

SAFETEA-LU section 6011(g) requires that EPA revise the transportation 
conformity rule as necessary to address the new statutory provisions. 
This final rule addresses the relevant changes that SAFETEA-LU made to 
the Clean Air Act.
    This final rule replaces the joint EPA-DOT interim guidance issued 
February 14, 2006, which provided guidance to areas subject to 
transportation conformity on implementing the changes to the Clean Air 
Act made by SAFETEA-LU.\2\ This final rule is consistent with the 
February 2006 guidance.
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    \2\ Note that the TCM portion of the February 14, 2006, guidance 
is not covered in today's final rule, but in an updated guidance 
document that will be available on EPA's Web site at http://www.epa.gov/otaq/stateresources/transconf/policy.htm
.

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    DOT is our federal partner in implementing the transportation 
conformity regulations. EPA has consulted with DOT on the development 
of this final rule, and DOT concurs with its content.
    EPA received comments on the proposed rule from 16 different 
entities, though some commenters submitted comments jointly. Commenters 
included state DOTs, MPOs, state and local air quality agencies, 
government associations, and industry associations.
    The majority of commenters supported EPA's proposal in general, and 
specific provisions in particular, which are discussed below. EPA is 
addressing these and other comments in the relevant sections of the 
preamble and in the responses to comments document, which can be found 
in the public docket for this final rule.

III. Frequency of Conformity Determinations

A. Description of Final Rule

    EPA is changing Sec.  93.104(b)(3) to require that the MPO and DOT 
determine conformity of a transportation plan at least every four 
years, and Sec.  93.104(c)(3) to require that the MPO and DOT determine 
conformity of a transportation improvement program (TIP) at least every 
four years. The pre-existing regulations required these determinations 
to be made at least every three years.

B. Rationale and Response to Comments

    These changes to Sec.  93.104 are needed to make the conformity 
regulation consistent with the law. In SAFETEA-LU, Congress amended 
Clean Air Act section 176(c)(4)(D)(ii) to require that conformity be 
determined with a frequency of four years, unless the MPO decides to 
update its transportation plan or TIP more frequently, or the MPO is 
required to determine conformity in response to a trigger (see Section 
IV.). The Clean Air Act previously required transportation plan and TIP 
conformity to be determined every three years. These Clean Air Act 
provisions have been in effect as of August 10, 2005.
    Several commenters voiced support for this change because it is 
consistent with the Clean Air Act, as amended by SAFETEA-LU. One 
commenter noted that this change will be helpful particularly to small 
communities. One commenter opposed the proposal because the commenter 
believes that having more frequent conformity determinations may be 
important in areas with significant on-road mobile source emissions.
    As already stated, and as other commenters noted, this change is

[[Page 4422]]

necessary to make the regulation consistent with the law. Furthermore, 
EPA believes that despite this change in the required frequency of 
conformity determinations, the transportation conformity program still 
achieves its purpose in ensuring transportation actions conform to the 
SIP. Transportation plans and TIPs must still conform before they are 
adopted.
    Several commenters suggested that EPA also change ``three years'' 
to ``four years'' in Sec.  93.104(d) of the conformity rule. This 
provision describes the circumstances when a conformity determination 
for a project is needed, one of which is when more than three years 
have elapsed since the most recent major step to advance the project. 
Commenters requested that three years be changed to four years to be 
consistent with SAFETEA-LU provisions of determining conformity on TIPs 
and transportation plans every four years.
    EPA is not changing Sec.  93.104(d) in this rulemaking. First, this 
change was not proposed, as it was not required by the Clean Air Act as 
amended by SAFETEA-LU. SAFETEA-LU aligned transportation plan, TIP, and 
the frequency of transportation plan and TIP conformity determinations 
to create efficiencies in the overall planning process, rather than to 
allow more time when project phases are delayed.
    Second, the conformity rule requires that a new conformity 
determination be done for a project if more than three years have 
elapsed since a major step has occurred to be consistent with the 
regulations under the National Environmental Policy Act (NEPA), rather 
than with the frequency of conformity determinations for transportation 
plans and TIPs. The NEPA regulations require reevaluation of NEPA 
documents for projects which have not had major action for three years. 
Please refer to ``H. Time Limit on Project-Level Determinations'' in 
the preamble of the November 24, 1993, conformity rule (58 FR 62200) 
for more explanation of this point.

C. Overlap With Transportation Planning Frequency Requirements

    In addition to changing the required frequency of conformity 
determinations from at least every three years to every four years, 
SAFETEA-LU also changed the required frequency for updating 
transportation plans and TIPs for transportation planning purposes. 
Prior to SAFETEA-LU, transportation plans in nonattainment and 
maintenance areas had to be updated every three years and TIPs updated 
every two years; now both transportation plans and TIPs must be updated 
every four years in these areas. However, MPOs can voluntarily update 
their transportation plans and TIPs more frequently. Consequently, 
conformity may still need to be determined more frequently than every 
four years, because an updated or amended transportation plan or TIP 
still must conform before it is adopted, regardless of the last time a 
conformity determination was done. Further discussion of the 
implementation of the SAFETEA-LU statewide and metropolitan 
transportation planning requirements can be found in DOT's February 14, 
2007, final rulemaking on metropolitan and statewide transportation 
planning (72 FR 7224).
    Today's change to the required frequency of transportation plan and 
TIP conformity determinations does not change other details for 
implementing conformity and planning frequency requirements. Both the 
transportation planning update clock and the conformity update clock 
continue to be reset on the date of the FHWA and FTA conformity 
determination for the respective transportation plan and/or TIP. For 
more information, see DOT's May 25, 2001, guidance, available on EPA's 
Web site at http://www.epa.gov/otaq/stateresources/transconf/policy.htm and on DOT's Web site at http://www.fhwa.dot.gov/environment/

ww.fhwa.dot.gov/environment/

D. Related Change: Consequences of a Control Strategy SIP Disapproval

1. Description of Final Rule
    EPA is revising Sec.  93.120(a)(2) to allow projects in the first 
four years of the conforming transportation plan and TIP, rather than 
the first three years of the conforming transportation plan and TIP, to 
proceed after final EPA disapproval of a control strategy SIP without a 
protective finding, i.e., when a conformity freeze occurs. In this 
section of the regulation, EPA is changing the two instances of ``three 
years'' to ``four years,'' similar to the changes made in Sec. Sec.  
93.104(b)(3) and (c)(3), the other sections of the rule affected by the 
change in the required frequency of conformity determinations. Though 
the final regulation at Sec.  93.120(a)(2) differs from the language 
that was proposed, it is the same in substance as the proposed rule.
2. Rationale and Response to Comments
    EPA is making this change to be consistent with the general 
implementation of SAFETEA-LU, which requires transportation plans and 
TIPs to be updated every four years and requires TIPs to cover a period 
of four years. EPA had proposed to generalize this language to allow a 
project to proceed during a freeze if it was included in the conforming 
TIP in order to account for the transition to new SAFETEA-LU 
transportation planning requirements. EPA believed the proposed 
language would be useful during the transition to SAFETEA-LU's planning 
requirements. We believed that when the rule became final, some MPOs 
would still have three-year TIPs prior to developing four-year TIPs for 
SAFETEA-LU. See the preamble to the May 2, 2007, proposed rule (72 FR 
24475) for EPA's full rationale. Several commenters supported the 
language we had proposed, because it accounted for the transition to 
SAFETEA-LU's planning requirements. EPA received no comments opposing 
it.
    However, the transition period ended on July 1, 2007. While some 
areas may still have three-year TIPs today, these will all be replaced 
over time by four-year TIPs. EPA believes the better update to Sec.  
93.120(a)(2) is simply to change the instances of ``three years'' to 
``four years,'' as it is more clear and more consistent with the prior 
regulatory language. If EPA disapproves a SIP without a protective 
finding in an area that still has a three-year TIP, only projects from 
the first three years of the conforming transportation plan and TIP 
could proceed, because the regulation states that projects must be in 
both the conforming transportation plan and TIP (except during the 
lapse grace period, discussed in Section V.E., below).
    Today's final rule at Sec.  93.120(a)(2) is consistent with the 
proposed rule for this section. Though the proposed language had 
eliminated the reference to a conforming transportation plan, EPA did 
not intend to change other rule requirements. In fact, EPA stated so in 
the preamble to the May 2, 2007, proposed rule:

    However, this proposed general language is not intended to 
change other rule requirements. Although EPA's change to Sec.  
93.120(a)(2) would no longer include the phrase ``conforming 
transportation plan,'' the requirements of Sec.  93.114 continue to 
apply. Specifically, there must still be a currently conforming 
transportation plan in place to approve projects during a conformity 
freeze (except as noted in Section V.E., below). (72 FR 24475)

    While it is the same in substance as the proposed rule language, 
the change to Sec.  93.120(a)(2) in today's final rule is more clear, 
because it continues to state explicitly that a project must be in both 
the conforming transportation plan as well as conforming TIP. Note that 
Section V.E. discusses the exception to this requirement during the 
lapse grace

[[Page 4423]]

period, which is also included in today's final rule for Sec.  
93.120(a)(2).

IV. Deadline for Conformity Determinations When a New Budget Is 
Established

A. Description of the Final Rule

    EPA is revising Sec.  93.104(e), which requires a new 
transportation plan and TIP conformity determination to be made after 
actions that establish a new motor vehicle emissions budget for 
conformity, also known as ``triggers.'' The revision gives MPOs and DOT 
two years, increased from 18 months, to determine conformity of a 
transportation plan and TIP when a new budget is established. An MPO 
and DOT must make a conformity determination within two years of the 
effective date of:
     EPA's finding that a motor vehicle emissions budget(s) 
(``budget(s)'') in a submitted SIP is adequate (40 CFR 93.104(e)(1));
     EPA's approval of a SIP, if the budget(s) from that SIP 
have not yet been used in a conformity determination (40 CFR 
93.104(e)(2)); and
     EPA's promulgation of a Federal implementation plan (FIP) 
with a budget(s) (40 CFR 93.104(e)(3)).

B. Rationale and Response to Comments

    This change makes the conformity regulation consistent with the 
current law. In SAFETEA-LU, Congress amended the Clean Air Act to give 
MPOs and DOT two years before conformity must be determined in response 
to one of the conformity triggers above. Several commenters generally 
supported this change, noting that it is necessary to be consistent 
with the current law. This Clean Air Act provision has been in effect 
as of August 10, 2005.
    The regulation's description of events that trigger a new 
conformity determination have not been changed because they were 
already consistent with the amendments made to the Clean Air Act in 
SAFETEA-LU, for the reasons described in the preamble to the May 2, 
2007, proposed rule (72 FR 24475-24476). EPA also notes that no change 
is necessary for the point at which the two-year clocks begin. The two-
year clocks begin on the effective date of EPA's adequacy finding or 
the effective date of EPA's SIP approval or FIP promulgation action. 
(For more details regarding the triggers, see Section III. of the 
August 6, 2002, final rule at 67 FR 50810 and Section XIX. of the July 
1, 2004, final rule, at 69 FR 40050).

V. Lapse Grace Period

A. Description of the Final Rule

    EPA is adding a one-year grace period before a conformity lapse 
occurs when an area misses an applicable deadline. The applicable 
deadlines are those that result from:
     The requirements to determine conformity of a 
transportation plan and TIP every four years under Sec. Sec.  
93.104(b)(3) and 93.104(c)(3) (see Section III.), and
     The requirement to determine conformity within two years 
of a trigger under Sec.  93.104(e) (see Section IV.).

EPA notes that the regulatory changes discussed in Section V. of this 
preamble do not impact isolated rural nonattainment or maintenance 
areas, because these areas do not include an MPO with a transportation 
plan or TIP conformity determination that would lapse. Isolated rural 
areas continue to be covered by the requirements in 40 CFR 93.109(l).
    To provide the rules to allow projects to meet conformity 
requirements \3\ during the lapse grace period, EPA is adding a new 
provision to the regulation, Sec.  93.104(f).
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    \3\ By the phrase ``meet conformity requirements,'' EPA means 
that FHWA/FTA projects can be found to conform, and non-Federal 
projects can be approved.
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     New Sec.  93.104(f)(1) allows non-exempt FHWA/FTA projects 
to be found to conform during the lapse grace period if they are 
included in the currently conforming transportation plan and TIP.
     New Sec.  93.104(f)(2) allows non-exempt FHWA/FTA projects 
to be found to conform during the lapse grace period if they were 
included in the most recent conforming transportation plan and TIP. 
However, even though Sec.  93.104(f)(2) allows a project to be found to 
conform when the transportation plan and TIP have expired, a project 
must also meet DOT's planning and other requirements to receive federal 
funding or approval.
    Today's rulemaking does not change how exempt projects and traffic 
signal synchronization projects are addressed under the transportation 
conformity rule. These projects are able to proceed during the lapse 
grace period, and for that matter during a conformity lapse, because 
exempt projects and traffic signal synchronization projects do not 
require project-level conformity determinations per 40 CFR 93.126 and 
93.128, respectively.
    In addition, EPA is revising Sec. Sec.  93.114, 93.115, and 93.121 
by including a reference to Sec.  93.104(f) to account for the lapse 
grace period:
     Section 93.114 requires that there be a currently 
conforming transportation plan and TIP at the time of project approval, 
except during the lapse grace period, when a non-exempt project must 
come from the most recent conforming transportation plan and TIP. (A 
project must also meet DOT's planning and other requirements to receive 
Federal funding or approval. See Section V.C. below for further 
discussion.)
     Section 93.115 requires that non-exempt FHWA/FTA projects 
come from a conforming transportation plan and TIP, except during the 
lapse grace period, when a project could come from the most recent 
conforming plan and TIP. (A project must also meet DOT's planning and 
other requirements to receive federal funding or approval. See Section 
V.C. below for further discussion.)
     Similarly, Sec.  93.121 requires that regionally 
significant non-Federal projects either come from the currently 
conforming transportation plan and TIP, or the regional emissions 
analysis that supports such a transportation plan and TIP, except 
during the lapse grace period, when such projects could be approved if 
they are from the most recent conforming transportation plan and TIP, 
or the regional emissions analysis that supported the most recent 
conforming transportation plan and TIP.
    Note that the lapse grace period only applies to transportation 
conformity, and not to DOT's transportation planning requirements. DOT 
and EPA agree that planning requirements still must be met during the 
lapse grace period in order for DOT to fund or approve a project as 
discussed further in C. of this section.

B. Rationale and Response to Comments

    These changes are necessary to make the conformity regulation 
consistent with the amended law and the intentions of Congress. In 
SAFETEA-LU, Congress amended the Clean Air Act to provide a one-year 
grace period before the consequences of a conformity lapse apply in 
section 176(c)(9) and added a definition of ``lapse'' in section 
176(c)(10). The changes to the law have been in effect as of August 10, 
2005. See the preamble to the May 2, 2007, proposed rule (72 FR 24476-
8) for EPA's full rationale supporting this provision of the final 
rule.
    Six of the seven commenters who commented on the lapse grace period 
supported EPA's proposal. These commenters generally believe that EPA's 
proposal to incorporate the lapse grace period into the conformity rule 
is consistent with the Clean Air Act as amended by SAFETEA-LU. One 
commenter stated that the lapse grace period allows time and 
flexibility for

[[Page 4424]]

areas to comply with Clean Air Act requirements. Another commenter who 
supported the lapse grace period specifically agreed with EPA's 
interpretation that Congress meant to allow conformity requirements to 
be satisfied for projects during the lapse grace period, even if there 
is no conforming transportation plan and TIP at the time. This 
commenter opined that any other interpretation renders Clean Air Act 
section 176(c)(9) meaningless.
    Two commenters requested that EPA clarify the commenters' 
interpretation that the lapse grace period applies to projects not from 
a conforming transportation plan and TIP as long as the requirements of 
40 CFR 93.115(b)(2) are addressed. EPA disagrees with the commenters' 
interpretation; merely meeting Sec.  93.115(b)(2) and nothing more 
would not be sufficient for a project to proceed during the lapse grace 
period. To be found to conform during the lapse grace period, a project 
must be from a conforming transportation plan and TIP (Sec.  
93.104(f)(1)), or from the most recent conforming transportation plan 
and TIP (Sec.  93.104(f)(2)).
    Section 93.115(b) describes the circumstances under which a project 
is considered to be from a conforming transportation plan. Paragraph 
(b)(2) provides that if a project is not specifically identified in the 
transportation plan, it can be considered to be ``from'' the plan as 
long as it ``is consistent with the policies and purpose of the 
transportation plan and will not interfere with other projects 
specifically included in the transportation plan.''
    A project that meets only the requirements of Sec.  93.115(b)(2) 
can be considered to be from a conforming transportation plan. But to 
proceed during the lapse grace period, it must also be from a 
conforming or most recent conforming TIP as well, as required by Clean 
Air Act sections 176(c)(2)(D) and (c)(2)(C)(i).
    The one commenter who opposed EPA's proposal for the lapse grace 
period thought that it was counter to EPA's mission to protect public 
health. The commenter stated that on-road mobile source emissions are 
important and thought that the lapse grace period would increase these 
emissions. In response, first EPA notes that Congress added the lapse 
grace period in its amendments to the Clean Air Act, and EPA is simply 
revising the regulations to make them consistent with the current law. 
Second, a project cannot actually proceed to completion unless there is 
a valid, i.e., currently conforming, TIP that also meets transportation 
planning requirements. Therefore, the project's emissions would have 
been considered in the conformity determination for this TIP, 
eliminating the possibility of unanticipated emissions increases.

C. How Does the Grace Period Work In Practice?

    The one-year conformity lapse grace period begins when the 
conformity determination required for a transportation plan or TIP is 
not made by the applicable deadline. As described above, during the 
grace period, a project may meet conformity requirements as long as it 
was included in either the currently conforming transportation plan and 
TIP or the most recent conforming transportation plan and TIP and other 
project-level conformity requirements are met.
    An FHWA/FTA project must also meet DOT's planning requirements to 
receive federal funding or approval. Specifically, 23 U.S.C. 134(j)(3) 
and 49 U.S.C. 5303(j)(3) require a TIP to be in place and 23 U.S.C. 
135(g)(4) and 49 U.S.C. 5304(g)(4) require a statewide TIP (STIP) to be 
in place for DOT to authorize transportation projects. The STIP 
contains all of the metropolitan area TIPs in the state.
    Three specific scenarios are presented below to show how expiration 
of the transportation plan and/or STIP/TIP at the time of the missed 
deadline affects the ability to advance FHWA/FTA projects during the 
conformity lapse grace period.\4\
---------------------------------------------------------------------------

    \4\ These scenarios are consistent with those highlighted in EPA 
and DOT's joint February 14, 2006, interim guidance, which is 
superceded by today's final rule.
---------------------------------------------------------------------------

    Scenario 1: If the transportation plan has expired, but the STIP/
TIP are still in effect, FHWA/FTA can continue to authorize and take 
action on projects in the STIP/TIP throughout the duration of the grace 
period or the duration of the STIP/TIP, whichever is shorter. The TIP 
and affected portion of the STIP cannot be amended once the 
transportation plan expires. Prior to transportation plan expiration, 
an MPO and state should ensure that the STIP/TIP include the desired 
projects from the transportation plan to continue to operate during the 
conformity lapse grace period.\5\
---------------------------------------------------------------------------

    \5\ For example, an MPO may want to amend its TIP before the 
transportation plan expires to allow projects from the fifth year of 
the transportation plan to proceed during the lapse grace period. 
The conformity determination for such an amended TIP would have to 
be made before the lapse grace period begins, but the determination 
could rely on the previous regional emissions analysis as long as 
the requirements of 40 CFR 93.122(g) are met.
---------------------------------------------------------------------------

    Scenario 2: If the transportation plan is still in effect, but the 
STIP/TIP have expired, FHWA/FTA cannot authorize FHWA/FTA projects. In 
order to advance projects, a new STIP/TIP would have to be developed 
that contains only projects that are consistent with the transportation 
plan. A conformity determination would have to be made for the new TIP 
unless it includes only exempt projects, traffic signal synchronization 
projects, or TCMs in an approved SIP. For example, if a new TIP 
included a non-exempt project from later years of the transportation 
plan, the new TIP would require a conformity determination. (However, 
the determination could rely on the previous regional emissions 
analysis as long as the requirements of 40 CFR 93.122(g) are met.)
    Scenario 3: If both the transportation plan and the STIP/TIP have 
expired, FHWA/FTA will not authorize projects under the planning 
regulations.
    Regardless of the scenario, in addition to transportation planning 
requirements, project-level conformity requirements must also be met 
during the lapse grace period including any required hot-spot analysis. 
Refer to the Table 1 in 40 CFR 93.109 for the conformity criteria and 
procedures that apply to projects.

D. Newly Designated Nonattainment Areas

    The lapse grace period provision in Clean Air Act section 176(c)(9) 
does not apply to the deadline for newly designated nonattainment areas 
to make the initial transportation plan/TIP conformity determination 
within 12 months of the effective date of the nonattainment 
designation. The lapse grace period in Clean Air Act section 176(c)(9) 
applies prior to when a lapse occurs, and Clean Air Act section 
176(c)(10) and 40 CFR 93.101 define the term ``lapse'' to mean that the 
conformity determination for a transportation plan or TIP has expired. 
Therefore, the lapse grace period does not apply unless an area has 
already had a conforming transportation plan and TIP that has expired; 
it does not apply to a newly designated area that has not yet made its 
initial conformity determination for a transportation plan and TIP for 
a new pollutant or air quality standard.
    Although the lapse grace period does not apply to newly designated 
areas, these areas already have similar existing flexibility because 
Clean Air Act section 176(c)(6) and 40 CFR 93.102(d) give newly 
designated areas one year before conformity applies, starting from the 
effective date of final nonattainment designation.\6\
---------------------------------------------------------------------------

    \6\ This one-year grace period for newly designated areas most 
recently applied to the areas designated for the 8-hour ozone and 
PM2.5 standards. All of these metropolitan areas have at 
this point determined transportation plan/TIP conformity.

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[[Page 4425]]

    Although the statutory and regulatory definitions of lapse do not 
apply to newly designated areas, once conformity applies, the identical 
restrictions of a conformity lapse will exist for any newly designated 
nonattainment area that does not have a conforming transportation plan 
and TIP in place one year after the effective date of EPA's 
designation. EPA and DOT will continue to use the term ``lapse'' 
informally to describe these situations.

E. Conformity Freezes

    EPA also notes the interaction of conformity lapse grace periods 
and conformity freezes. A conformity freeze occurs if EPA disapproves a 
control strategy SIP without a protective finding for the budgets in 
that SIP (see Sec.  93.120(a)(2)).\7\ During a freeze, some projects 
can be advanced, but the area cannot adopt a new transportation plan or 
TIP until a new SIP is submitted with budgets that EPA approves or 
finds adequate. If conformity of a transportation plan and TIP has not 
been determined using a new control strategy SIP with budgets that EPA 
approves or finds adequate within two years of EPA's SIP disapproval, 
highway sanctions apply (under Clean Air Act section 179(b)(1)) and the 
freeze becomes a lapse.
---------------------------------------------------------------------------

    \7\ Such disapprovals occur infrequently; EPA has only 
disapproved SIPs without a protective finding in three instances 
since the 1997 conformity rule was promulgated.
---------------------------------------------------------------------------

    The lapse grace period would apply during a freeze only if the 
transportation plan/TIP expire before highway sanctions apply. The 
lapse grace period would apply in this case because the grace period 
applies when an area misses an applicable deadline to determine 
conformity for the transportation plan and TIP. The transportation plan 
and TIP would remain in a freeze even once the lapse grace period 
begins, and would remain frozen until either a conformity determination 
is made to new adequate or approved SIP budgets as described above, or 
highway sanctions apply.
    An area that is in a conformity freeze and subsequently enters the 
lapse grace period would lapse at the end of the grace period (one year 
after the missed deadline), or when highway sanctions apply, whichever 
comes first. As described above, however, a project must also meet 
DOT's planning and other requirements to receive Federal funding or 
approval during the lapse grace period.
    If a freeze becomes a lapse because two years transpire from the 
effective date of EPA's disapproval of the SIP (when highway sanctions 
are applied), the area cannot use the lapse grace period. A lapse that 
occurs because two years have transpired since EPA's disapproval of a 
SIP is not a lapse that results from missing an applicable deadline to 
determine conformity. Thus, the lapse grace period would not apply by 
its own terms when sanctions are applied.

VI. Timeframes for Conformity Determinations

A. Overview

    Through SAFETEA-LU, Congress added new paragraph (7) to Clean Air 
Act section 176(c) to allow areas to elect to shorten the period of 
time addressed by their transportation plan/TIP conformity 
determinations, or ``timeframe.'' Prior to this change, every 
conformity determination for a transportation plan and TIP has had to 
cover the entire timeframe of the transportation plan. Transportation 
plans cover a period of 20 years or longer. Because of the requirement 
to determine conformity of the entire transportation plan, the last 
year of the transportation plan has had to be analyzed in all 
transportation plan or TIP conformity determinations, as well as other 
earlier years in the timeframe of the transportation plan.
    Under the amended Clean Air Act, an MPO continues to demonstrate 
conformity for the entire timeframe of the transportation plan unless 
the MPO elects to shorten the conformity timeframe. An election to 
shorten the conformity timeframe could be made only after consulting 
with the state and local air quality agencies \8\ and soliciting public 
comment and considering such comments. If an MPO makes this election, 
the conformity determination does not have to cover the entire length 
of the transportation plan, but in some cases an informational analysis 
is also required.
---------------------------------------------------------------------------

    \8\ The amendment to the Clean Air Act that allows areas to 
shorten the timeframe of conformity determinations, Clean Air Act 
section 176(c)(7), requires the MPO to consult with ``the air 
pollution control agency.'' For the reasons explained in the May 2, 
2007, proposed rule (72 FR 24479 and 27780), EPA is using the 
equivalent term ``state and local air quality agencies'' in this 
preamble and final rule.
---------------------------------------------------------------------------

    This provision giving areas the option to shorten their conformity 
timeframe took effect on August 10, 2005, when SAFETEA-LU became law. 
Note, however, that transportation plan/TIP conformity determinations 
must cover the entire length of the transportation plan unless an 
election is made to shorten the timeframe.
    Today EPA is finalizing several changes in the regulatory language 
to provide the rules for shortening the conformity timeframe, and most 
of these changes are found in Sec.  93.106(d). This section discusses 
these changes and is organized as follows:
     Metropolitan areas that do not have an adequate or 
approved second maintenance plan (Section VI.B.).
     Metropolitan areas with adequate or approved second 
maintenance plans (Section VI.C.).
     How elections are made in metropolitan areas to either 
shorten the conformity timeframe, or revert to the original conformity 
timeframe once the timeframe has been shortened (Section VI.D.).
     Isolated rural areas (Section VI.E.).
     Conformity implementation in all areas under a shortened 
conformity timeframe, including which years must be analyzed (Section 
VI.F.).

B. Timeframe Covered by Conformity Determinations in Metropolitan Areas 
Without Second Maintenance Plans

1. Description of Final Rule
    Transportation plan and TIP conformity determinations must cover 
the timeframe of the transportation plan, unless an MPO elects to 
shorten the timeframe. This requirement is found in Sec.  93.106(d)(1). 
In areas without an adequate or approved second maintenance plan (i.e., 
a maintenance plan addressing Clean Air Act section 175A(b)), the Clean 
Air Act requires that a shortened conformity determination must extend 
through the latest of the following years:
     The first 10-year period of the transportation plan;
     The latest year for which the SIP (or FIP) applicable to 
the area establishes a motor vehicle emission budget; or
     The year after the completion date of a regionally 
significant project if the project is included in the TIP, or the 
project requires approval before the subsequent conformity 
determination.
    These requirements are found in EPA's regulation at Sec.  
93.106(d)(2)(i). The final language in Sec.  93.106(d)(2)(i) is 
consistent with the proposed language, although minor clarifications 
have been made in response to comments. Specifically, the regulation at 
Sec.  93.106(d)(2)(i) states, ``The shortened timeframe of the 
conformity determination must extend at least to the latest of the 
following years.'' The proposed wording was, ``The shortened timeframe 
of the conformity determination must be the longest of the following.''

[[Page 4426]]

    The final regulation at Sec.  93.106(d)(2)(i)(B) is also slightly 
different than proposed, but the same in substance as the proposed 
rule. This provision now reads, ``The latest year for which an adequate 
or approved motor vehicle emissions budget(s) is established in a 
submitted or applicable implementation plan'' rather than the proposed 
wording, ``The latest year in the submitted or applicable 
implementation plan that contains an adequate or approved motor vehicle 
emissions budget(s).''
    Note that an MPO that has shortened its conformity timeframe does 
not choose which of these three timeframes it prefers to examine in the 
conformity determination; it must examine the longest of them. Such an 
MPO would have to determine which timeframe is the longest for each 
conformity determination, as the longest timeframe could change from 
determination to determination, because for example new budgets have 
been established or new regionally significant projects have been added 
to the TIP since the previous conformity determination.
2. Rationale and Response to Comments
    These provisions to allow MPOs to shorten the timeframe covered by 
a conformity determination are necessary to make the conformity 
regulation consistent with the law. In SAFETEA-LU, Congress amended the 
Clean Air Act by adding section 176(c)(7), which allows MPOs to elect 
to shorten the timeframe of conformity determinations. EPA's regulation 
at Sec.  93.106(d)(1) requires that conformity determinations cover the 
timeframe of the transportation plan unless the MPO makes an election 
to shorten the timeframe. The Clean Air Act section 176(c)(7)(A) 
specifically states, ``Each conformity determination * * * shall 
require a demonstration of conformity for the period ending on either 
the final year of the transportation plan, or at the election of the 
metropolitan planning organization, * * *'' a shorter timeframe.
    EPA's regulation at Sec.  93.106(d)(2)(i), which requires that a 
shortened timeframe must cover the longest of the three periods 
specified, also comes directly from the Clean Air Act. Specifically, 
section 176(c)(7)(A) states that a shortened conformity determination 
must cover:

    The longest of the following periods:
    (i) The first 10-year period of any such transportation plan.
    (ii) The latest year in the implementation plan applicable to 
the area that contains a motor vehicle emissions budget.
    (iii) The year after the completion date of a regionally 
significant project if the project is included in the transportation 
improvement program or the project requires approval before the 
subsequent conformity determination.

    EPA received several comments in support of the flexibility to 
shorten the timeframe of the conformity determination.
    EPA is clarifying the language in Sec.  93.106(d)(2)(i) and Sec.  
93.106(d)(2)(i)(B) from the proposal based on the suggestion of three 
commenters, although the meaning is the same as in the proposal. As a 
result, the final rule clarifies that the shortened timeframe must 
extend through the latest year of the three periods. EPA modified some 
of the commenters' suggested language to be consistent with the 
statute.
    The same commenters also suggested we change the language in Sec.  
93.106(d)(2)(i)(B) to refer to the latest year for which a budget is 
established, rather than the latest year that ``contains'' a budget. 
EPA has taken this suggestion because this language likewise improves 
clarity.

C. Timeframe of Conformity Determinations in Metropolitan Areas With 
Second Maintenance Plans

1. Description of Final Rule
    In areas that have an adequate or approved maintenance plan under 
Clean Air Act section 175A(b), transportation plan and TIP conformity 
determinations must cover the timeframe of the transportation plan 
unless an MPO elects to shorten the timeframe. This requirement is 
found in Sec.  93.106(d)(1). Section 175A(b) of the Clean Air Act is 
the provision that describes the submission of a maintenance plan that 
covers the second ten years of the maintenance period. If an MPO with 
an adequate or approved second maintenance plan elects to shorten the 
timeframe, transportation plan and TIP conformity determinations would 
cover the period of time through the end of the maintenance period, 
that is, the period of time covered through the second maintenance 
plan. This period of time is in contrast to the longest of the three 
periods discussed in Section VI.B. for areas that do not have an 
adequate or approved second maintenance plan. The regulatory language 
for shortening the timeframe in areas with second maintenance plans is 
found in Sec.  93.106(d)(3).
2. Rationale and Response to Comments
    This rule provision for shortening the conformity timeframe in 
metropolitan areas with an adequate or approved second maintenance plan 
results directly from the Clean Air Act as amended by SAFETEA-LU. Clean 
Air Act section 176(c)(7)(C) specifically says that in areas with a 
second maintenance plan, a shortened conformity timeframe is ``required 
to extend only through the last year of the implementation plan 
required under section 175(A)(b)'' [sic] rather than the longest of the 
three periods established in Clean Air Act section 176(c)(7)(A).
    Several commenters specifically noted their support for this 
provision. However, one commenter suggested that the proposed language 
for Sec.  93.106(d)(2)(i) should be revised to be consistent with the 
fact that the Clean Air Act as amended by SAFETEA-LU allows areas with 
adequate or approved second 10-year maintenance plans to determine 
conformity through only the last year of the maintenance plan. EPA's 
proposed regulation was consistent with the statutory provision for 
areas with adequate or approved second maintenance plans, and the final 
rule is as well. EPA believes this commenter may have misread the 
organization of this section, as we covered areas without second 
maintenance plans in Sec.  93.106(d)(2), and areas with second 
maintenance plans in Sec.  93.106(d)(3).

D. Process for Elections

1. Description of Final Rule
    First, before an MPO elects to shorten the conformity timeframe, it 
has to consult with state and local air quality planning agencies, 
solicit public comment, and consider those comments. These requirements 
are found in Sec.  93.106(d)(2). Consultation with the state and local 
air agencies would occur early in the decision-making process.
    Second, once an MPO makes an election to shorten the period of time 
addressed in its transportation plan/TIP conformity determinations, the 
election remains in effect until the MPO elects otherwise. An MPO would 
make its election only once for a pollutant or pollutants and any 
relevant precursors, unless it chooses to elect otherwise in the 
future. An MPO that has elected to shorten the timeframe of conformity 
determinations that wants to revert to analyzing the full timeframe of 
the transportation plan must consult with the state and local air 
quality agencies, solicit public comments, and consider such comments 
before doing so. These provisions are found in Sec.  93.106(d)(4).
    EPA believes that consultation with the state and local air quality 
agencies on shortening the timeframe would typically occur in the 
context of the

[[Page 4427]]

normal interagency consultation process. EPA believes that for this 
consultation to be meaningful, it needs to occur at an early stage in 
the decision-making process. Therefore, consultation should occur when 
the MPO begins to consider shortening the timeframe. For example, it 
may be appropriate to discuss an election to shorten the conformity 
timeframe in the preliminary stages of developing the regional 
emissions analysis.
    MPOs should follow their normal process for public participation 
regarding conformity actions when electing to shorten their conformity 
timeframe. MPOs are not required to revise their public participation/
involvement procedures required by 23 U.S.C. 134(i)(5) to address 
public consultation on shortening the area's conformity timeframe.
    MPOs are encouraged to make their elections prior to the start of 
the public comment period for their next conformity determination. 
Making the election prior to the start of the public comment period for 
the next conformity determination ensures that the public will 
understand that future conformity determinations will address a shorter 
period of time. Doing so will also allow the MPO to develop its next 
conformity determination in a more efficient manner and avoid running 
analyses for additional years, as described in the following paragraph.
    However, there may be instances when an MPO will want to take 
public comments on the election to shorten the conformity timeframe at 
the same time that it is taking public comment on a conformity 
determination. In those cases, the conformity information presented to 
the public should include both a regional emissions analysis reflecting 
the election of a shorter timeframe and a regional emissions analysis 
that reflects the full length of the transportation plan. EPA 
recommends that both a shortened and a full-length analysis be included 
so that the MPO can complete its conformity determination according to 
its desired schedule, even if it receives negative public comment about 
shortening the timeframe and decides not to do so.
2. Rationale and Response to Comments
    General process. Clean Air Act section 176(c)(7)(A) and (C) are the 
sections of the statute that allow elections to shorten the conformity 
timeframe. Both of these sections allow such elections to be made only 
``after consultation with the air pollution control agency and 
solicitation of public comments and consideration of such comments.'' 
The Clean Air Act refers only to consultation with the air agency or 
agencies and does not require their concurrence.
    A definition of ``air pollution control agency'' has been added at 
Clean Air Act section 176(c)(7)(E), which EPA interprets to mean the 
relevant state and local air quality agencies that have regularly 
participated in the conformity consultation process, as discussed in 
the preamble to the May 2, 2007, proposed rule (72 FR 24480).
    EPA's regulation states that once an election to shorten the 
timeframe is made, it would remain in effect until the MPO elects 
otherwise, because that statement is specifically included in the 
statute. Clean Air Act section 176(c)(7)(D) states, ``Any election by a 
metropolitan planning organization under this paragraph shall continue 
to be in effect until the metropolitan planning organization elects 
otherwise.''
    Changing previous elections. EPA requested comment on two options 
for the process that MPOs must follow if they have shortened the 
conformity timeframe and want to revert back to determining conformity 
for the full length of the transportation plan. Option A would have 
required MPOs to consult with state and local air agencies and solicit 
and consider public comment before reverting back to determining 
conformity for the full length of the transportation plan; Option B 
would have allowed MPOs to revert to the full timeframe without 
additional consultation or public comment.
    EPA is finalizing Option A. As explained in the proposal, Clean Air 
Act section 176(c)(7)(D) states that a shortened timeframe remains in 
effect unless an MPO ``elects otherwise.'' An ``election'' to shorten 
the timeframe under section 176(c)(7) requires consultation with the 
state and local air quality agencies, solicitation of public comment 
and consideration of any comments received. EPA's interpretation is 
that an election to revert to determining conformity for the entire 
length of the transportation plan is an election under this section and 
therefore also includes consultation with the state and local air 
pollution control agencies, solicitation of public comment, and 
consideration of those comments. Since the Clean Air Act uses the same 
term--``election''--in both subsections, it is reasonable to conclude 
that the same process should be followed for both actions.
    However, we expect the resource burden of this requirement to be 
minimal. MPOs can limit the additional burden of consultation with 
state and local air agencies and solicitation and consideration of 
public comment by using procedures developed to meet existing 
conformity requirements. Consultation with the state and local air 
quality planning agencies must already occur on the conformity 
determination within the interagency consultation process. Similarly, 
the MPO must already seek public comment on the conformity 
determination, according to the requirements in 40 CFR 93.105(e). By 
relying on these existing consultation procedures, the MPO could avoid 
the additional resource costs associated with running another 
interagency consultation process or full public comment process for 
electing to revert to the full conformity timeframe.
    Two trade associations supported Option A, and stated that their 
members appreciate the opportunity to comment on significant decisions 
made by MPOs that have the potential to impact transportation projects 
or an area's ability to move forward with its transportation plans. 
These commenters thought that the public comment period should occur 
early in the conformity process so that conformity timing would not be 
negatively impacted. EPA appreciates these comments and supports the 
ability of the public to comment on decisions within the transportation 
conformity process that affect them.
    A couple of commenters supported Option B, allowing an MPO to 
revert to a full-plan conformity timeframe without additional 
consultation or solicitation of public comment. Commenters opined that 
consultation and public comment are already required by 40 CFR 93.105, 
and those requirements already ensure that state and local air agencies 
will be consulted before any decisions are made. While MPOs can use 
these existing consultation and public comment provisions when 
reverting to the full transportation plan length timeframe, EPA is 
finalizing Option A so that MPOs will specifically solicit comment on 
the length of the conformity timeframe within these existing processes.
    Other commenters offered an alternative option of using the 
established interagency consultation process to decide if a new public 
comment period should be required before an area elects to revert back 
to determining conformity for the entire timeframe of the 
transportation plan. The commenters suggested that this option would 
allow areas the flexibility to decide if a new public comment period is 
needed, while minimizing resource costs.
    EPA did not finalize these commenters' suggestion because it would 
have required MPOs to consult

[[Page 4428]]

with a more extensive set of agencies to return to the full conformity 
timeframe than required by the statute when shortening the timeframe in 
the first place. When an MPO elects to shorten the timeframe, the Clean 
Air Act requires consultation with the state and local air agencies. 
Under the commenters' suggestion, before electing to revert to the full 
timeframe, MPOs would have to consult not only with state and local air 
agencies, but also EPA, DOT, and state and other local transportation 
agencies (e.g., transit agencies), because the interagency consultation 
process includes all of these agencies. This additional consultation is 
beyond what is required by this section of the statute.
    As stated above, the existing interagency consultation process can 
be used to fulfill the requirement for consultation with state and 
local air quality agencies, because the MPO will be meeting with or 
speaking to representatives of these agencies in the context of the 
interagency consultation process. However, EPA believes that consulting 
with the relevant air agencies within the existing interagency 
consultation process is different, and less burdensome, than consulting 
with every agency involved in the interagency process. Second, the 
statute does not separate the interagency consultation and public 
comment processes as suggested by the commenters. The Clean Air Act 
section 176(c)(7) requires both consultation and public involvement 
whenever a timeframe is shortened, rather than consultation without 
public involvement. Rather than having agencies decide if the public 
would benefit by commenting, EPA believes the better interpretation of 
Congress' intent is to offer the public the opportunity to comment in 
all cases.
    Placement in regulatory text. EPA is placing the requirements for 
state and local air quality agency consultation and public comment for 
shortening the conformity timeframe in Sec.  93.106 because this type 
of consultation would only occur when the MPO is considering electing 
to shorten the timeframe. Furthermore, placing these requirements in 
Sec.  93.106, rather than in 40 CFR 93.105, assures that no states with 
approved conformity SIPs have to amend them to add this provision. (See 
Section VII. for more information about the requirements for conformity 
SIPs.) EPA received no comments about this placement. See the preamble 
to the May 2, 2007, proposed rule (72 FR 24481) for EPA's full 
rationale.

E. Isolated Rural Nonattainment and Maintenance Areas

1. Description of Final Rule
    Isolated rural nonattainment and maintenance areas do not have MPOs 
and are not required to prepare transportation plans or TIPs (40 CFR 
93.101). Projects in these areas are generally included in the long-
range statewide transportation plan and the statewide TIP. Isolated 
rural areas are not ``donut areas.'' \9\
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    \9\ Donut areas are defined as ``geographic areas outside a 
metropolitan planning area boundary, but inside the boundary of a 
nonattainment or maintenance area that contains any part of a 
metropolitan area(s)...'' (40 CFR 93.101).
---------------------------------------------------------------------------

    The final rule gives isolated rural nonattainment and maintenance 
areas the flexibility to shorten the conformity timeframe in the same 
manner as metropolitan areas. The requirements for shortening the 
conformity timeframe in isolated rural areas are identical to the 
requirements in metropolitan areas, except the entity that would make 
the election to shorten the timeframe in an isolated rural area is the 
state DOT, rather than the MPO. The rule accomplishes this result by 
including a sentence in Sec.  93.109(l)(2)(i) that says, ``When the 
requirements of Sec.  93.106(d) apply to isolated rural areas, 
references to ``MPO'' should be taken to mean the state department of 
transportation.''
2. Rationale and Response to Comments
    EPA believes it is appropriate to extend this flexibility to 
isolated rural areas to be consistent with how the conformity rule has 
been implemented in isolated rural areas. The Clean Air Act amendment 
made by SAFETEA-LU allowing areas to shorten their conformity 
timeframes does not prohibit its use in isolated rural areas. In 
general, most aspects of the conformity regulation apply consistently 
to metropolitan and isolated rural areas. Where there are differences, 
the differences have given isolated rural areas additional flexibility. 
See the preamble to the May 2, 2007, proposed rule (72 FR 24482) for 
EPA's full discussion of why EPA concludes it is appropriate to give 
isolated rural areas the flexibility to shorten their conformity 
timeframe.
    Seven commenters supported allowing isolated rural areas to shorten 
the timeframe of conformity determinations, and none opposed it. 
Commenters generally agreed with EPA's rationale that Congress did not 
prohibit extending the flexibility to isolated rural areas, and that 
these areas are treated much like MPOs throughout the rest of the 
conformity rule. One commenter noted that extending this flexibility to 
isolated rural areas will have no impact on project-level requirements 
in these areas.
    EPA proposed two options for the entity that would make the 
election in isolated rural areas: Either the state DOT or the project 
sponsor, and solicited input on whether there are any other 
alternatives. Six commenters supported the state DOT option, and two 
supported the project sponsor option; no alternative entities were 
suggested.
    EPA believes that assigning the ability to elect to shorten the 
conformity timeframe to the state DOT makes the most sense. First, the 
state DOT prepares the statewide transportation plan and the statewide 
TIP and therefore in this regard, the state DOT serves a function in an 
isolated rural area that is similar to an MPO. Two commenters that 
supported the state DOT option cited this reason as well. Also, the 
state DOT may be better able to coordinate the consultation necessary 
to make an election with the state and local air quality planning 
agencies and with the public than any other entity in an isolated rural 
area. One commenter noted that given the consultation and public 
participation requirements associated with preparing transportation 
planning documents, the state DOT would be in the best position to 
satisfy similar requirements for electing to shorten the timeframe.
    Though the state DOT is typically the project sponsor who prepares 
the conformity determination, several commenters were concerned about 
the possibility of there being more than one project sponsor in an 
area. Commenters noted that there may be multiple small entity project 
sponsors in an area, which could possibly lead to conflicts. A couple 
of commenters thought that the project sponsor option could result in 
confusion, inconsistent decisions in a state, and unpredictability.
    The two commenters that supported the project sponsor option 
thought that project sponsors would be more closely attuned to local 
concerns. However, these commenters recognized that if there were 
multiple project sponsors, conflicts could arise, and recommended that 
in those cases, the state DOT should have the ability to shorten the 
timeframe. In considering these comments, EPA solicited input from EPA 
and DOT field offices, and concluded that in all recent cases, the 
state DOT is in fact the project sponsor for all FHWA/FTA projects in 
isolated rural areas. These areas are different than donut areas where 
county agencies sometimes are the project sponsor.

[[Page 4429]]

    Finally, EPA believes it appropriate to name the state DOT as the 
entity with the ability to shorten the timeframe in an isolated rural 
area for specificity, because the state DOT is already relied upon in 
the conformity rule and guidance for isolated rural area conformity 
requirements.

F. Specific Analysis Requirements Under a Shortened Timeframe

1. Description of Final Rule
    EPA is including most of the necessary regulatory language for 
shortening the conformity timeframe within Sec.  93.106, and is also 
updating Sec. Sec.  93.118 and 93.119. Note that these provisions apply 
to both metropolitan and isolated rural areas.
     First, Sec.  93.106 is being renamed as ``Content of 
transportation plans and timeframe of conformity determination.''
     Second, Sec.  93.106(a)(1) is being amended to update the 
horizon years that apply when an area shortens the conformity 
timeframe. (Section 93.106(a)(1) only applies to serious, severe or 
extreme ozone and serious CO nonattainment areas with urbanized 
populations greater than 200,000.)
     Third, EPA is updating Sec. Sec.  93.118 and 93.119 to 
indicate that particular years must be analyzed only if they are in the 
conformity timeframe and to include the requirements for any needed 
informational analyses.
    Areas that use the budget test. In areas that have budgets that 
choose to shorten the timeframe, the requirements for demonstrating 
consistency with budgets, and analyzing specific years, are similar to 
requirements that have existed, and still exist, for areas that 
determine conformity for the full length of the transportation plan. 
Under a shortened timeframe, consistency with, and an analysis for, the 
attainment year is necessary only if the attainment year is both within 
the timeframe of the transportation plan and conformity determination. 
In addition, under a shortened timeframe, instead of analyzing the last 
year of the transportation plan for the conformity determination, the 
analysis must be done for the last year of the shortened timeframe.
    In areas that do not have an adequate or approved second 
maintenance plan budget, the conformity determination must also be 
accompanied by a regional emissions analysis for the last year of the 
transportation plan, as well as for any year where the budgets were 
exceeded in a previous regional emissions analysis if that year is 
later than the shortened conformity timeframe. These regional emissions 
analyses must be done in a manner consistent with how the budget test 
is performed and all relevant requirements of the transportation 
conformity regulation (e.g., 40 CFR 93.110, 93.111, and 93.122). 
However, these analyses would be for informational purposes only, and 
emissions would not have to meet the budgets in these years. 
Documentation of any informational analysis should clearly state that 
its purpose is informational only, and that conformity is not required 
to be demonstrated for the last year of the transportation plan or any 
year where the budgets were exceeded in a previous regional emissions 
analysis if that year is later than the shortened conformity timeframe. 
There is no similar requirement for information-only analyses in areas 
with an adequate or approved second maintenance plan budget, for the 
reasons described below.
    Areas that use the interim emissions tests. In areas that do not 
have budgets and use the interim emissions tests, the requirements for 
analysis years in areas that shorten their conformity timeframe are 
similar to the requirements in Sec.  93.119 that have applied and still 
apply under a full transportation plan-length conformity determination. 
Under a shortened timeframe, instead of analyzing the last year of the 
transportation plan, the analysis would be done for the last year of 
the shortened timeframe.
    The conformity determination must be accompanied by a regional 
emissions analysis for the last year of the transportation plan in 
areas that use the interim emissions tests. This regional emissions 
analysis would be for informational purposes only, and must be done in 
a manner consistent with all relevant requirements of the 
transportation conformity regulation (e.g., 40 CFR 93.110, 93.111, and 
93.122). Note that there is no requirement for an informational 
regional emissions analysis for years where the interim tests were not 
met in a previous regional analysis, as there is for areas that use the 
budget test that do not have adequate or approved second maintenance 
plans.
    EPA proposed three options for the informational analysis for the 
last year of the transportation plan in areas that use the interim 
emissions tests: To compare estimated emissions to the interim 
emissions test(s) used in the conformity determination (Option X), to 
compare estimated emissions to either interim emissions test (Option 
Y), or just to estimate emissions without comparing them to either test 
(Option Z). EPA is finalizing Option Z.
    While the final rule requires only an estimate of regional 
emissions for the transportation system that would exist in the last 
year of the transportation plan, EPA encourages MPOs and state DOTs to 
present this informational analysis in context so that it is truly 
informative for members of the public or state and local air agencies 
who are reviewing it. One possible way of doing so is to present a 
summary table of all of the years for which an analysis was run, 
including both the years analyzed in the conformity determination and 
the last year analyzed for informational purposes only. Another 
possible method would be to present a comparison with the emissions 
level from the baseline year (e.g., 2002), as is done for the baseline 
year test under 40 CFR 93.119. Furthermore, it would also be acceptable 
for an area to complete the build/no-build test as well, if desired. 
Documentation of any informational analysis should clearly state that 
its purpose is informational only, and that conformity is not required 
to be demonstrated for the last year of the transportation plan.
2. Rationale and Response to Comments
    General. EPA has made these changes to the conformity regulation 
because SAFETEA-LU has amended the Clean Air Act to allow MPOs to 
shorten their conformity timeframes. EPA is implementing the specific 
requirements of the new Clean Air Act provision in today's regulatory 
changes. These changes for required analysis years for conformity 
determinations with shortened timeframes are generally consistent with 
what has been current practice when conformity is determined for the 
full length of the transportation plan.
    Given that the statute did not specify the years that must be 
analyzed in a conformity determination with a shortened timeframe, EPA 
reasonably concluded that the existing conformity requirements should 
apply. Therefore, in areas that use the budget test, a shortened 
conformity determination would have to include the attainment year if 
it is in the timeframe of the conformity determination, similar to the 
existing requirement to include the attainment year if it is in the 
timeframe of the transportation plan. In areas that use the interim 
emissions test, a shortened conformity determination would include an 
analysis year no more than five years into the future, just as full-
length conformity determinations do.
    In addition, regardless of the test used under a shortened 
timeframe, the last year of the conformity determination

[[Page 4430]]

would need to be analyzed. This requirement is similar to the existing 
one to analyze the last year of the transportation plan. Likewise, 
under a shortened timeframe, analysis years would be no more than ten 
years apart, just as under a full-length conformity determination. No 
comments were received on these general provisions.
    Areas that use the budget test. If the conformity timeframe is 
shortened in an area that does not have an adequate or approved second 
maintenance plan, EPA's regulation requires that the conformity 
determination be accompanied by an informational analysis. The rule 
language for the regional emissions analysis for the last year of the 
transportation plan, and for any year where the budgets were exceeded 
in a previous regional emissions analysis if that year is later than 
the shortened conformity timeframe, is also based in the new statutory 
language. Clean Air Act section 176(c)(7)(B) requires that the 
conformity determination ``be accompanied by a regional emissions 
analysis'' for these years. Absent a definition for ``regional 
emissions analysis'' in the statute, EPA assumes that the phrase has 
its usual meaning in the context of transportation conformity. 
Therefore, these analyses need to be done in a manner consistent with 
all the general requirements of the conformity regulations for such 
analyses.
    This same statutory language is the reason that these analyses do 
not need to meet the required conformity tests. The statutory language 
makes it clear that these emissions analyses only ``accompany'' the 
conformity determination, and thus are not part of the conformity 
determination. Therefore, EPA concludes that conformity need not be 
demonstrated with respect to these analyses.
    Areas that use the interim emissions tests. In areas that use the 
interim emissions tests, an informational analysis is required only for 
the last year of the transportation plan. In contrast, areas that use 
budgets also must do an informational analysis for any years that 
exceeded the budgets in a prior analysis. Such years would be years 
that extended beyond the shortened timeframe of prior conformity 
determinations, which were analyzed for informational purposes only. 
This result is because Clean Air Act section 176(c)(7)(B) states that 
these information-only regional emissions analyses are to be done ``for 
the last year of the transportation plan and for any year shown to 
exceed emissions budgets by a prior analysis, if such year extends 
beyond'' the end of the shortened timeframe. Areas subject to the 
interim emissions tests for a given pollutant or precursor do not have 
budgets for that pollutant or precursor. Therefore, there will not be 
any years for which a prior analysis shows the budget will be exceeded, 
and as such there is no statutory requirement for these areas to 
perform an informational regional emissions analysis for any year other 
than the last year of the transportation plan.
    EPA requested comment on three options for what an information-only 
regional emissions analysis would consist of in an area that uses the 
interim emissions test. Option X would have required that emissions be 
compared to the same interim emissions test (i.e., build/no-build and/
or the baseline year test(s)) as is used in the conformity 
determination. Option Y would have required that emissions be compared 
to either interim emissions test. Option Z, which we finalized, 
requires simply the estimate of emissions in the last year of the 
transportation plan with no comparison to either interim emissions 
test.
    The statutory language is ambiguous regarding the information-only 
regional emissions analysis prior to the establishment of SIP budgets. 
Section 176(c)(7)(B) states that the regional emissions analysis that 
accompanies the conformity determination must be performed for the last 
year of the transportation plan, but does not specify that the interim 
emissions tests be conducted. The Congressional report language for 
this section states, ``Generating this information will be helpful in 
ensuring that conformity is maintained,'' \10\ but does not include any 
direction on how this goal should be met in those areas that use the 
interim emissions tests.
---------------------------------------------------------------------------

    \10\ Joint Explanatory Statement of the Committee of Conference, 
``Section 6011, Transportation Conformity,'' p. 1059.
---------------------------------------------------------------------------

    Five commenters provided opinions on these options. One commenter 
preferred Option X (i.e., to use the same test(s) as in the conformity 
determination) because it involves use of similar information to that 
presented elsewhere in the determination. This commenter thought that 
presenting the estimate of emissions in context of the interim 
emissions tests is helpful in informing state and local agencies and 
the public about future emissions trends, and is consistent with the 
intent of Congress.
    The remaining four commenters preferred Option Z. Some of these 
commenters thought that comparisons to the interim emissions tests 
could be confusing to stakeholders if a test is not met for the 
informational analysis. One of these commenters thought that EPA should 
allow for the presentation of these results at the discretion of the 
MPO and state DOT after interagency consultation. This commenter 
thought that states and MPOs understand the local context for 
transportation conformity and are best suited for determining what 
information should be presented for the last year of the transportation 
plan under a shortened timeframe.
    As described above, EPA is finalizing Option Z to be consistent 
with the statute, which does not require that the interim emissions 
tests be performed for informational purposes. Under the final rule, 
MPOs and state DOTs have the discretion in presenting the results of 
the informational analysis for the last year of the transportation 
plan, and EPA encourages them to provide useful information to other 
involved agencies and the public. See Section F.1. above for additional 
suggestions on how to present such analyses to the public.
    Areas with second maintenance plans that shorten their conformity 
timeframe. No information-only analyses is required in areas with an 
adequate or approved second maintenance plan, given Clean Air Act 
section 176(c)(7)(C). The statute labels this section, which applies to 
areas that have an adequate or approved second maintenance plan, as 
``Exception.'' EPA interprets section 176(c)(7)(C) to mean that areas 
with adequate or approved second maintenance plans that shorten their 
conformity timeframe do not have to comply with the requirements of 
Clean Air Act section 176(c)(7)(A) or (B), and section 176(c)(7)(C) 
itself does not require any informational analyses. Therefore, areas 
with a second maintenance plan that shorten their conformity timeframe 
do not have to perform a regional emissions analysis for the last year 
of their transportation plans, or for a year shown to exceed budgets by 
a prior analysis, as required by Clean Air Act section 176(c)(7)(B) for 
other areas that have shortened their timeframe. EPA received no 
comments on this particular point.

VII. Conformity SIPs

A. Description of Final Rule

    EPA is changing 40 CFR 51.390 to streamline the requirements for 
state conformity SIPs. A conformity SIP is different from a control 
strategy SIP or maintenance plan, as a conformity SIP only includes 
state conformity procedures and not motor vehicle

[[Page 4431]]

emissions budgets or air quality demonstrations.
    EPA is finalizing requirements for states to submit conformity SIPs 
that address only the following sections of the pre-existing federal 
rule. These three sections that need to be tailored to a state's 
individual circumstances:
     40 CFR 93.105, which addresses consultation procedures;
     40 CFR 93.122(a)(4)(ii), which states that conformity SIPs 
must require that written commitments to control measures be obtained 
prior to a conformity determination if the control measures are not 
included in an MPO's transportation plan and TIP, and that such 
commitments be fulfilled; and
     40 CFR 93.125(c), which states that conformity SIPs must 
require that written commitments to mitigation measures be obtained 
prior to a project-level conformity determination, and that project 
sponsors comply with such commitments.
    Prior to SAFETEA-LU, states were required to address these 
provisions as well as all other federal conformity rule provisions in 
their conformity SIPs. The rule had previously required states' 
conformity SIPs to include most of the sections of the federal rule 
verbatim.
    In addition, EPA is also deleting the requirement for states to 
submit conformity SIPs to DOT. States must continue to submit 
conformity SIPs to EPA. EPA is also reorganizing the conformity SIP 
regulatory language to improve clarity and readability. The regulatory 
language in Sec.  51.390 is re-ordered to more naturally fall into 
three topics: Purpose and applicability, conformity implementation plan 
content, and timing and approvals. The language retains existing 
requirements with appropriate modifications based on the new Clean Air 
Act amendment from SAFETEA-LU.

B. Rationale and Response to Comments

    EPA is primarily changing Sec.  51.390 to make the transportation 
conformity regulation consistent with the law, which has been in effect 
since August 10, 2005. In SAFETEA-LU, Congress amended the Clean Air 
Act so that states are no longer required to adopt much of the federal 
transportation conformity rule into their SIPs. Instead, Clean Air Act 
section 176(c)(4)(e) now requires states to include in their conformity 
SIPs:

    Criteria and procedures for consultation required by 
subparagraph (D)(i), and enforcement and enforceability (pursuant to 
section 93.125(c) and 93.122(a)(4)(ii) of title 40, Code of Federal 
Regulations) in accordance with the Administrator's criteria and 
procedures for consultation, enforcement, and enforceability.

Subparagraph (D)(i) in Clean Air Act section 176(c)(4) requires EPA to 
write regulations that address consultation procedures to be undertaken 
by MPOs and DOT with state and local air quality agencies and state 
DOTs before making conformity determinations. EPA's regulations 
governing consultation are found at 40 CFR 93.105. Therefore, in effect 
the statute now requires states to address and tailor only the three 
sections of the conformity rule noted above in their conformity SIPs.
    EPA believes that the new conformity SIP requirements will reduce 
the administrative burden for state and local agencies significantly, 
because the new requirements will result in fewer required conformity 
SIP revisions in most areas. Four commenters supported these changes. 
Three commenters specifically agreed that these changes streamline the 
conformity SIP process and preclude the need for a state to update its 
conformity SIP each time the federal rule is revised. These commenters 
requested that EPA urge states to include only the three required 
sections in their conformity SIPs to minimize the possibility of having 
to revise the SIP when the federal rule is updated. EPA agrees with 
this point. However, the fourth commenter also requested that states 
still be able to incorporate the rest of the transportation conformity 
rule by reference. This option is further discussed in Section D.2 
below.
    EPA is removing the requirement for states to submit conformity 
SIPs to DOT to be consistent with SAFETEA-LU's changes. In revising the 
Clean Air Act's previous conformity SIP requirements, Congress did not 
retain the previous requirement that ``each State shall submit to the 
Administrator and the Secretary of Transportation * * * a revision to 
its implementation plan * * *.'' The new statutory language in Clean 
Air Act section 176(c)(4)(E) does not include this previous 
requirement, and therefore, we are removing this requirement to reduce 
state and local air agency processing of their conformity SIPs. 
However, EPA does not believe that this proposal will substantively 
change DOT's involvement in conformity SIP development. This does not 
change the existing conformity rule's requirement that EPA provide DOT 
with a 30-day comment period on conformity SIP revisions.
    The re-organizational changes to Sec.  51.390 are for clarity and 
readability and not related to changes in the law. EPA is making these 
changes to make this section more user-friendly, and the changes do not 
affect the substance of the pre-existing regulatory requirements.

C. How Does the Final Rule Impact States?

1. Areas That Have Never Submitted a Conformity SIP
    States that have never submitted a conformity SIP are required to 
address only the three provisions noted above in their conformity SIPs 
according to any existing conformity SIP deadline (see D. of this 
section below).
2. Areas That Have Submitted a Conformity SIP That Was Never Approved
    In some cases, states have submitted conformity SIPs to EPA for 
approval, but EPA has not yet acted on them. These states can write 
their EPA Regional Office and request that EPA approve only the three 
provisions that are required to be included in their SIPs and that EPA 
take no action on the remainder of the submission. States can also 
leave the full conformity SIP pending before EPA for rulemaking action. 
However, if EPA approves the full SIP, states could not apply any 
subsequent changes that EPA makes to the federal rule without first 
revising their state conformity SIP and obtaining EPA's approval.
3. Areas With Approved Conformity SIPs
    States with EPA-approved conformity SIPs that decide to eliminate 
the provisions that are no longer mandatory would need to revise the 
SIP to eliminate those provisions. EPA would have to approve the 
changes to a state's conformity SIP through the Federal Register 
rulemaking process. Such a SIP revision should not be controversial 
because the provisions are no longer required by the Clean Air Act as 
amended by SAFETEA-LU. In addition, their elimination from a state's 
conformity SIP would not change conformity's implementation in practice 
because the federal conformity rule applies for any provision not 
addressed in a state's conformity SIP. States are encouraged to work 
with their EPA Regional Office as early in the process as possible to 
ensure the SIP submission meets all requirements and is fully 
approvable.
4. Areas That Submit a Partial Conformity SIP
    A state may choose to submit a conformity SIP that addresses only 
one or two of the three required sections of the federal rule. In this 
situation, EPA

[[Page 4432]]

could approve the submitted section(s) if it sufficiently addresses the 
requirement it is intended to fulfill. However, the Clean Air Act as 
amended by SAFETEA-LU requires states to address all three sections in 
their conformity SIP, so a state that addresses only one or two of the 
requirements would still have an outstanding requirement.

D. When Are Conformity SIPs Due?

    SAFETEA-LU did not create any new deadlines for conformity SIPs. 
Any nonattainment or maintenance area that has missed earlier deadlines 
to submit conformity SIP revisions (e.g., after previous conformity 
rulemakings, or new nonattainment designations) continues to be subject 
to these previous deadlines, but only in regard to the three provisions 
now required by the Clean Air Act. Two scenarios are described below.
1. Areas With Conformity SIPs That Address Only the Three Required 
Provisions
    Once a state has an approved conformity SIP that addresses only the 
three sections that the Clean Air Act now requires, the state would 
need to revise its conformity SIP only if EPA revises one of these 
sections of the conformity rule, or the state chooses to revise one of 
these three provisions. Any future changes to the federal conformity 
rules beyond these three provisions would apply in any state that has 
only these three provisions in its approved conformity SIP, and these 
changes would not need to be adopted into the state's SIP.
2. Areas That Choose To Either Retain or Submit Additional Sections of 
the Conformity Rule
    A state with a previously approved conformity SIP may decide to 
retain all or some of the federal rule in its SIP or a state without an 
approved conformity SIP could choose to submit for EPA approval all or 
some of the other sections of the federal rule. As noted above, one of 
the commenters expressly asked that EPA retain this option presumably 
so its state could avoid revising its conformity SIP. In such a case, 
the state should be aware that the conformity determinations in the 
state continue to be governed by the state's approved conformity SIP. 
Such a state would need to revise its conformity SIP when EPA makes 
changes to the federal rule in order to have those changes apply in the 
state. As stated earlier, EPA strongly encourages states to only 
include the three required provisions in a conformity SIP to take 
advantage of the streamlining flexibilities provided for by the Clean 
Air Act, as amended by SAFETEA-LU. EPA is updating our previous 
guidance on conformity SIPs. The guidance will be available on EPA's 
Web site at: http://www.epa.gov/otaq/stateresources/transconf/policy.htm.
 State and local agencies that need to prepare a conformity 

SIP should review this guidance and consult with the appropriate EPA 
Regional Office.

VIII. Transportation Control Measure Substitutions and Additions

    SAFETEA-LU section 6011(d) amended the Clean Air Act by adding a 
new section 176(c)(8) that establishes specific criteria and procedures 
for replacing TCMs in an approved SIP with new TCMs and adding TCMs to 
an approved SIP.
    EPA is revising the definition of a TCM in Sec.  93.101 to clarify 
that TCMs as defined for conformity purposes also include any TCMs that 
are incorporated into the SIP through this new TCM substitution and 
addition process. However, EPA has determined that no additional 
revision of the transportation conformity regulations is necessary to 
implement the TCM substitution and addition provision. EPA did not 
receive any comments on this portion of the proposed rulemaking.
    EPA concluded no implementing regulations are necessary for the 
reasons explained in the preamble to the May 2, 2007 proposed rule (72 
FR 24485-6).
    EPA is updating our previous guidance on TCM substitutions and 
additions. The guidance will be available on EPA's Web site at: http://www.epa.gov/otaq/stateresources/transconf/policy.htm.
 This guidance is 

consistent with the TCM substitution and additions portion (Section 5) 
of the EPA-DOT February 2006 Interim Guidance for implementing SAFETEA-
LU. State and local agencies considering TCM substitutions or additions 
should review this guidance and consult with the appropriate EPA 
Regional Office.
    Clean Air Act section 176(c)(8) requires that the EPA Administrator 
consult and concur on TCM substitutions and additions. However, as has 
been done with most other responsibilities related to the approval of 
SIP revisions, the Administrator has delegated this authority to the 
Regional Administrators. On September 29, 2006, the EPA Administrator 
signed a delegation of authority (Delegation of Authority 7-158: 
Transportation Control Measure Substitutions and Additions) providing 
EPA Regional Administrators with the authority to consult and concur on 
TCM substitutions and additions. The delegation of authority allows the 
Regional Administrators to further delegate these responsibilities to 
the regional air division directors, but no further.

IX. Categorical Hot-Spot Findings for Projects in Carbon Monoxide 
Nonattainment and Maintenance Areas

A. Background

    Since the initial conformity rule was promulgated in 1993, a hot-
spot analysis has been required for all project-level conformity 
determinations in CO nonattainment and maintenance areas (40 CFR 93.116 
and 93.123(a)). A CO hot-spot analysis is an estimation of likely 
future localized pollutant concentrations and a comparison of those 
concentrations to the CO national ambient air quality standards 
(``standards'') (40 CFR 93.101). A hot-spot analysis assesses air 
quality impacts on a scale smaller than the entire nonattainment or 
maintenance area, such as a congested roadway intersection.
    A CO hot-spot analysis must show that a non-exempt FHWA/FTA project 
does not cause any new violations of the CO standards or increase the 
frequency or severity of existing violations (40 CFR 93.116(a)). Until 
a CO attainment demonstration or maintenance plan is approved, non-
exempt FHWA/FTA projects must also eliminate or reduce the severity and 
number of localized CO violations in the area substantially affected by 
the project (40 CFR 93.116(b). These existing requirements remain 
unchanged by today's final rule.
    The type of CO hot-spot analysis varies depending on the type of 
project involved. Section 93.123(a)(1) requires quantitative hot-spot 
analyses for projects of most concern; section 93.123(a)(2) requires 
either a quantitative or qualitative hot-spot analysis for all other 
projects. These existing requirements also remain unchanged by today's 
final rule.
    Hot-spot analyses are also required for certain projects in 
PM2.5 and PM10 nonattainment and maintenance 
areas. The conformity rule allows DOT, in consultation with EPA, to 
make a ``categorical hot-spot finding'' in PM2.5 and 
PM10 nonattainment and maintenance areas if there is 
appropriate modeling that shows that a particular category of highway 
or transit projects will meet applicable Clean Air Act conformity 
requirements without further analysis (40 CFR 93.123(b)(3)). If DOT 
makes such a finding, then no further hot-spot analysis to meet 40 CFR 
93.116(a) is needed for any project that fits the category addressed by 
the finding. A project sponsor would simply

[[Page 4433]]

reference a categorical hot-spot finding in the project-level 
conformity determination to meet hot-spot analysis requirements. See 
EPA's March 10, 2006, final rule for further information (71 FR 12502-
12506) on categorical hot-spot findings in PM2.5 or 
PM10 areas.

B. Description of Final Rule

    EPA is extending the categorical hot-spot finding provision that 
applies in PM areas to CO nonattainment and maintenance areas in 
today's final rule. This provision allows DOT, in consultation with 
EPA, to make categorical hot-spot findings for appropriate cases in CO 
nonattainment and maintenance areas if appropriate modeling shows that 
a type of highway or transit project does not cause or contribute to a 
new or worsened local air quality violation of the CO standards, as 
required under 40 CFR 93.116(a).\11\ The regulatory text for this 
provision is found in Sec.  93.123(a)(3).
---------------------------------------------------------------------------

    \11\ As discussed further below, categorical hot-spot findings 
under the proposal could not be used to meet 40 CFR 93.116(b) 
requirements in the limited number of CO areas without approved 
attainment demonstrations or maintenance plans.
---------------------------------------------------------------------------

    Any DOT categorical hot-spot finding would have to be supported by 
a credible quantitative modeling demonstration showing that all 
potential projects in a category satisfy statutory requirements without 
further hot-spot analysis. Such modeling would need to be derived in 
consultation with EPA, and consistent with EPA's existing CO 
quantitative hot-spot modeling requirements, as described in 40 CFR 
93.123(a), and approved emissions model requirements in 40 CFR 93.111. 
Modeling used to support a categorical hot-spot finding could consider 
the emissions produced from a category of projects based on potential 
project sizes, configurations, and levels of service. Modeling could 
also consider the emissions produced by a category of projects and the 
resulting impact on air quality under different circumstances.
    The new provision does not affect the requirement for conformity 
determinations to be completed for all non-exempt projects in CO areas. 
The modeling on which a categorical finding is based would serve to 
fulfill the hot-spot analysis requirements for qualifying projects. The 
modeled scenarios used by DOT to make categorical hot-spot findings 
would be derived through consultation and participation by EPA.
    Existing interagency consultation procedures for project-level 
conformity determinations also must be followed (40 CFR 93.105). Any 
project-level conformity determination that relies on a categorical 
hot-spot finding is also still subject to existing public involvement 
requirements, during which commenters could address all appropriate 
issues relating to the categorical findings used in the conformity 
determination. See D. of this section for further information on how 
EPA and DOT will implement this new provision.

C. Rationale and Response to Comments

    EPA believes it is both appropriate and in compliance with the 
Clean Air Act for DOT to be able to make categorical hot-spot findings 
where modeling shows that such projects will not cause or contribute to 
new or worsened air quality violations. As long as modeling shows that 
all potential projects in a category meet the current conformity rule's 
hot-spot requirements (40 CFR 93.116(a))--either through an analysis of 
a category of projects or a hot-spot analysis for a single project--
then certain Clean Air Act conformity requirements are met.
    Clean Air Act section 176(c)(1)(B) is the statutory criterion that 
must be met by all projects in CO nonattainment and maintenance areas 
that are subject to transportation conformity. Section 176(c)(1)(B) 
states that federally-supported transportation projects must not 
``cause or contribute to any new violation of any standard in any area; 
increase the frequency or severity of any existing violation of any 
standard in any area; or delay timely attainment of any standard or any 
required interim emission reductions or other milestones in any area.''
    EPA has not amended the existing CO hot-spot requirements in 40 CFR 
93.116(a) that ensure areas meet Clean Air Act section 176(c)(1)(B) 
requirements. Today's provision for DOT to make categorical hot-spot 
findings simply allows future information to be taken into account in 
an expedited manner, so that further CO hot-spot analyses are not 
performed on an individual basis for projects where it is determined to 
be unnecessary to meet certain statutory requirements. Making hot-spot 
findings for certain projects on a category basis may reduce the 
resource burden for state, regional and local agencies, and provide 
greater certainty and stability to the transportation planning process, 
while still ensuring that all projects meet Clean Air Act requirements.
    As noted above, CO categorical hot-spot findings under today's 
final rule could not be used to meet an additional hot-spot requirement 
for CO areas without approved attainment demonstrations or maintenance 
plans. Clean Air Act section 176(c)(3)(B)(ii) requires projects in 
these CO areas to also ``eliminate or reduce the severity and number of 
violations of the carbon monoxide standards in the area substantially 
affected by the project.'' This criterion is stipulated by 40 CFR 
93.109(f)(1) and 93.116(b) for FHWA/FTA projects in these CO areas. EPA 
believes that this criterion is more appropriately met by evaluating 
the unique circumstances of an individual project, rather than based on 
a broader analysis of a category of projects. Since most CO areas 
already have approved attainment demonstrations or maintenance plans, 
there should be limited practical impact of this aspect of today's 
proposal.
    Six commenters supported this provision. These commenters agreed 
that allowing DOT to make categorical hot-spot findings, in 
consultation with EPA, provides an opportunity to streamline hot-spot 
analyses in all CO areas for certain projects.
    Additionally, commenters thought these categorical hot-spot 
findings would be consistent with the practice in many states already, 
and would reduce resource burdens while still ensuring that projects 
meet Clean Air Act requirements.
    Some commenters thought that allowing DOT to make categorical hot-
spot findings in CO areas would offer flexibility in satisfying the 
intent of the Clean Air Act. A commenter recognized that categorical 
hot-spot findings would have to be supported by credible quantitative 
modeling, and the scenarios modeled by DOT to make categorical findings 
would be derived through consultation and participation by EPA. EPA 
notes that the commenter's understanding is correct; see Section IX.D. 
below for further description of how modeling would be developed.
    While six commenters supported allowing DOT to make categorical 
hot-spot findings for projects in CO areas, one commenter was concerned 
that the provision to allow U.S. DOT to make categorical hot-spot 
findings would be a requirement, rather than an option. This provision 
is an optional flexibility and not a requirement. Once DOT has made a 
finding for a category of projects, a sponsor of a project in that 
category can choose whether to rely on DOT's modeling, or do its own 
project-level analysis. In other words, a project sponsor can always 
decide to do its own project-level analysis, even for a project that 
belongs to a category that DOT has already analyzed.
    This same commenter thought that this provision is unnecessary. The 
commenter thought that the similar

[[Page 4434]]

provision that applies in PM areas was created because of uncertainties 
regarding PM and because interagency consultation is needed to 
determine which projects are ``projects of air quality concern'' and 
what constitutes a ``significant number of diesel vehicles.'' This 
commenter also opined that the PM provision for categorical hot-spot 
analyses was developed because there are not acceptable modeling tools 
for PM2.5 or PM10. In contrast, the commenter 
explained that the parameters used to identify the need for a CO hot-
spot analysis are clearly stated under Sec.  93.123(a), and the 
technology for CO hot-spot analyses is accepted by EPA and FHWA.
    EPA disagrees with the commenter and believes it is useful to have 
a provision for categorical hot-spot analyses in CO areas. This 
provision will be useful because all non-exempt projects in CO areas 
that belong to a category for which DOT has made a hot-spot finding 
will have a hot-spot analysis available for use in future conformity 
determinations. As noted above, project sponsors have discretion on 
whether they want to model each project even if DOT has already made a 
categorical hot-spot finding for projects of that type.
    This same commenter also stated that interagency consultation on CO 
analyses simply adds a layer of costly and inefficient bureaucracy that 
is unnecessary to complete the analysis. EPA disagrees with the 
commenter on this point as well. No additional layer of bureaucracy 
will be added to project-level conformity determinations in CO areas as 
a result of this provision. EPA and DOT's coordination on modeling for 
categorical hot-spot findings will occur separately from any particular 
project's conformity determination.

D. General Implementation for Categorical Hot-Spot Findings

    EPA and DOT will implement the CO categorical hot-spot finding 
provision similar to the implementation of PM2.5 and 
PM10 categorical hot-spot findings, as described in the 
March 10, 2006, final rule. A project-level conformity determination 
continues to be required for all non-exempt FHWA/FTA projects in CO 
areas. Modeling used to support a categorical hot-spot finding would be 
based on appropriate motor vehicle emissions factor models, dispersion 
models, and EPA's existing requirements for quantitative CO hot-spot 
modeling as specified in 40 CFR 93.123(a)(1) (40 CFR part 51, Appendix 
W (Guideline on Air Quality Models)). Categorical hot-spot findings and 
modeling to support such findings would primarily involve EPA and DOT 
headquarters offices rather than field offices. Such coordination at 
the headquarters level will ensure national consistency in applying 
Sec.  93.123(a)(3) and (b)(3).
    In the March 2006 final rule (71 FR 12505), EPA and DOT described 
the general process for categorical hot-spot findings to be as follows:
     FHWA and/or FTA, as applicable, would develop modeling, 
analyses, and documentation to support the categorical hot-spot 
finding. This would be done with early and comprehensive consultation 
and participation with EPA.
     FHWA and/or FTA would provide EPA an opportunity to review 
and comment on the complete categorical hot-spot finding documentation. 
Any comments would need to be resolved in a manner acceptable to EPA 
prior to issuance of the categorical hot-spot finding. Consultation 
with EPA on issue resolution would be documented.
     FHWA and/or FTA would make the final categorical hot-spot 
finding in a memorandum or letter, which would be posted on EPA's and 
DOT's respective conformity Web sites.
    Subsequently, transportation projects that meet the criteria set 
forth in the categorical hot-spot finding would reference that finding 
in their project-level conformity determination, which would be subject 
to interagency consultation and the public involvement requirements of 
the National Environmental Policy Act (NEPA) process and the conformity 
rule (40 CFR 93.105(e)). The existing consultation and public 
involvement processes would be used to consider the categorical hot-
spot finding for a particular project.

X. Removal of Regulation 40 CFR 93.109(e)(2)(v)

A. Description of Final Rule

    EPA is removing a provision of the transportation conformity rule 
that was vacated by the U.S. Court of Appeals for the District of 
Columbia Circuit (Environmental Defense v. EPA, et al., D.C. Cir. No. 
04-1291) on October 20, 2006. This provision, 40 CFR 93.109(e)(2)(v), 
allowed 8-hour ozone areas to use the interim emissions test(s) for 
conformity instead of 1-hour ozone SIP budgets where the interim 
emissions test(s) was determined to be more appropriate to meet Clean 
Air Act requirements. The court vacated this provision and remanded it 
to EPA.

B. Rationale and Response to Comments

    As discussed in the July 1, 2004, preamble (69 FR 40025), EPA 
anticipated that this provision would be used infrequently but that 
there would be some cases where using the interim emissions test(s) 
would be more appropriate to meet Clean Air Act requirements. Because 
of the court's decision on this provision, 8-hour ozone areas can no 
longer rely on Sec.  93.109(e)(2)(v) to use an interim emissions 
test(s) instead of using 1-hour ozone budget(s). Areas must now use all 
relevant existing 1-hour ozone budgets in future conformity 
determinations until 8-hour ozone emissions budgets are found adequate 
or are approved for a given analysis year. EPA received one comment 
agreeing that the removal is consistent with the court ruling.
    The court's decision has minimal impact since most 8-hour ozone 
areas are already either using their 1-hour or 8-hour ozone SIP 
budgets. EPA, in cooperation with DOT, has already provided assistance 
to the limited number of areas affected by the recent court decision.

XI. Miscellaneous Revisions

A. Minor Revision to Sec.  93.102(b)(4)

    EPA is making a minor revision to Sec.  93.102(b)(4), which 
addresses the period of time that transportation conformity applies in 
maintenance areas. This is the period of time during which the 
requirements of the conformity rule apply in an area, and not the 
timeframe any one conformity determination examines, as discussed in 
Section VI., ``Timeframes for Conformity Determinations.''
    Section 93.102(b)(4) had previously stated that conformity applied 
in ``maintenance areas for 20 years from the date EPA approves the 
area's request under section 107(d) of the CAA for redesignation to 
attainment, unless the applicable implementation plan specifies that 
the provisions of this subpart shall apply for more than 20 years.'' We 
are clarifying this section to ensure that conformity would apply in 
maintenance areas through the last year of their approved Clean Air Act 
section 175A(b) maintenance plan (i.e., the area's second 10-year 
maintenance plan), unless the applicable implementation plan specifies 
that conformity would continue to apply beyond the end of that 
maintenance plan. We received two comments that supported this 
clarification.
    EPA is only clarifying Sec.  93.102(b)(4) because the previous 
regulation may have been read to not account for the situation where a 
maintenance area submits a second maintenance plan that establishes a 
budget for a year more than 20 years beyond the date of EPA's

[[Page 4435]]

approval of the area's redesignation request and first maintenance 
plan.
    For example, suppose an area's redesignation request and first 
maintenance plan are approved in 2006 and the maintenance plan 
establishes budgets for 2016. This area submits a second maintenance 
plan that extends through 2030 and establishes budgets for that year. 
Under the previous regulatory language, conformity applied in this area 
``for 20 years from the date EPA approves'' the area's redesignation to 
maintenance, i.e., until 2026, despite the fact that the area would 
have budgets for 2030. This result would have been inconsistent with 
the Clean Air Act, which requires that transportation activities 
conform to the SIP. EPA's clarification that conformity applies through 
the last year of the approved second maintenance plan ensures that 
conformity applies throughout the time period covered by the SIP 
budgets. In this example, conformity would apply until 2030.
    This revision will not change the implementation of conformity 
requirements in maintenance areas. The Clean Air Act requires that 
maintenance plans cover a period of 20 years from the year that EPA 
approves the area's redesignation request. With this change in the 
regulation, conformity would continue to apply in maintenance areas for 
at least 20 years beyond the date of EPA's redesignation of an area to 
maintenance. This clarification is consistent with EPA's intention as 
expressed in the preamble to the 1993 final transportation conformity 
rule, which stated, ``If the maintenance plan establishes emissions 
budgets for more than twenty years, the area would be required to show 
conformity to that maintenance plan for more than twenty years'' (58 FR 
62206).

B. Technical Corrections to Sec. Sec.  93.102(b)(2)(v) and 
93.119(f)(10)

    EPA is making corrections to Sec. Sec.  93.102(b)(2)(v) and 
93.119(f)(10) to change ``sulfur oxides'' to ``sulfur dioxide'' and 
``SOX'' to ``SO2.'' In the May 6, 2005, 
transportation conformity final rule (70 FR 24279), EPA finalized 
requirements for PM2.5 precursors. In that final rulemaking, 
we included ``sulfur oxides'' as one of the precursors and referred to 
sulfur oxides as SOX. Since that rulemaking was finalized, 
EPA has finalized the PM2.5 implementation rule (72 FR 
20586) and indicated that sulfur dioxide (SO2) would be 
regulated as a PM2.5 precursor rather than all sulfur 
oxides. We are making these corrections to the transportation 
conformity rule in order to make it consistent with EPA's broader 
PM2.5 implementation strategy. We received two comments that 
supported these corrections. This change will not impact current 
conformity practice.

C. Revisions to ``Table 2--Exempt Projects'' in Sec.  93.126

    EPA is making several minor clarifications to ``Table 2--Exempt 
Projects'' in Sec.  93.126, under the category of ``Safety.'' 
Specifically, EPA is updating the following terms:
     ``Hazard elimination program'' is now ``Projects that 
correct, improve, or eliminate a hazardous location or feature;''
     ``Safety improvement program'' is now ``Highway Safety 
Improvement Program implementation;'' and
     ``Pavement marking demonstration'' is now ``Pavement 
marking.''
    EPA is updating these terms to make them consistent with the terms 
in 23 U.S.C. 148, which has been amended by SAFETEA-LU section 1401. 
These revisions to Table 2 of the conformity regulation do not change 
the types of safety projects that are exempt from transportation 
conformity requirements. These revisions would only update the 
terminology to be consistent with the changes made by SAFETEA-LU to 23 
U.S.C. 148. For more details see Section XI. C. ``Revisions to `Table 
2--Exempt Projects' in Sec.  93.126'' in the May 2, 2007, notice of 
proposed rulemaking (72 FR 24488).
    We received five comments on this portion of the proposal. Several 
of the commenters indicated that they support the changes to the list 
of exempt projects.
    One commenter asked if EPA had considered revising the list of 
exempt projects in 40 CFR 93.126 to further clarify the types of 
projects that are exempt or non-exempt under ``Transportation 
Enhancement Activities.'' FHWA's guidance on activities that may be 
funded with Transportation Enhancement Activities is available on DOT's 
Web site at: http://www.fhwa.dot.gov/environment/te/guidance.htm#eligible.
 After reviewing this guidance, we have concluded 

that 40 CFR 93.126 is correct and additional changes are not required.
    Some commenters recommended additions to the list of exempt 
projects in Sec.  93.126. Given that we did not propose and request 
public comment on these additional changes to the list of exempt 
projects, these comments are outside the scope of today's rulemaking.

D. Definitions

    Today's final rule revises the definitions of ``metropolitan 
planning organization (MPO)'' and ``transportation improvement program 
(TIP)'' to reflect the definitions in SAFETEA-LU sections 3005(a) and 
6001(a). Pursuant to SAFETEA-LU, the term ``MPO'' now refers to the 
policy board for the organization that is designated under 23 U.S.C. 
134(d) and 49 U.S.C. 5303(d). EPA is revising the definitions of these 
terms in Sec.  93.101 to be consistent with the new statutory 
definitions. These changes have no practical impact in conformity 
implementation.
    EPA received three comments supporting the revisions to the 
definitions of MPO and TIP because these changes make the 
transportation conformity regulation consistent with SAFETEA-LU.

E. Minor Clarifications for Hot-Spot Analyses

    EPA is incorporating two minor clarifications to the conformity 
rule's hot-spot analysis provisions. These changes do not substantively 
change current requirements but should improve understanding and 
implementation of the conformity rule, in light of other rule changes. 
Three commenters supported these changes related to hot-spot analyses.
    First, EPA is making minor changes to Sec. Sec.  93.109(l)(2)(i) 
and 93.116(a) to ensure that CO, PM10, and PM2.5 
hot-spot analyses will continue to consider a project's air quality 
impact over the entire timeframe of the transportation plan or long-
range statewide transportation plan, as appropriate. Specifically, 
EPA's minor change to Sec.  93.116(a) ensures that hot-spot analyses 
cover the timeframe of the transportation plan in metropolitan and 
donut nonattainment and maintenance areas. The addition to Sec.  
93.109(l)(2)(i) ensures that hot-spot analyses in isolated rural areas 
examine a project's air quality impact over the timeframe of the long-
range statewide transportation plan.
    As discussed in Section VI., today's final rule allows MPOs to 
elect to shorten the timeframe addressed by transportation plan and TIP 
conformity determinations, and allows state DOTs to elect to shorten 
the timeframe addressed by regional emissions analyses in isolated 
rural areas. The minor changes to Sec. Sec.  93.116(a) and 
93.109(l)(2)(i) ensure that project-level hot-spot analyses examine the 
appropriate time period, even if the timeframe of the long-range 
transportation plan or TIP conformity determination or regional 
emissions analysis is shortened. The Clean Air Act provisions that 
allow an election to shorten the timeframe covered by

[[Page 4436]]

conformity determinations apply only to transportation plan and TIP 
conformity determinations, or regional emissions analyses in isolated 
rural areas, and do not apply to hot-spot analyses.
    Second, today's final rule incorporates a technical clarification 
to Sec.  93.123(b)(1)(i) to address some confusion in the field since 
our March 10, 2006, final rule (71 FR 12468). Section 93.123(b)(1)(i) 
requires PM2.5 or PM10 hot-spot analyses to be 
completed for ``New highway projects that have a significant number of 
diesel vehicles, and expanded projects that have a significant increase 
in the number of diesel vehicles.'' The prior wording was ``New or 
expanded highway projects that have a significant number of or 
significant increase in diesel vehicles.''
    Since the March 2006 final rule was promulgated, EPA and DOT have 
received several questions regarding what types of new and expanded 
highway projects are covered by Sec.  93.123(b)(1)(i). For example, 
some state and local transportation agencies have asked how the current 
rule's reference to a ``significant increase in diesel vehicles'' 
applies to new highway projects. Although EPA and DOT have answered 
these and other questions,\12\ clarifying this provision of the 
conformity rule will assist planners as they implement the rule in the 
future. The technical clarification in today's final rule does not 
change the type of new or expanded highway projects that would require 
PM2.5 or PM10 hot-spot analyses for 
transportation conformity purposes; we are simply clarifying the 
provision through a grammatical change.
---------------------------------------------------------------------------

    \12\ For additional information about PM2.5 and 
PM10 hot-spot analysis requirements, including 
regulations, guidance, and Q and As, see EPA's and DOT's Web sites 
at: http://www.epa.gov/otaq/stateresources/transconf/index.htm and 

http://www.fhwa.dot.gov/environment/conform.htm.

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

F. Minor Revision for Terms Used To Describe Transportation Plan 
Revisions

    EPA is finalizing a minor revision to how Sec. Sec.  93.104(b)(2) 
and 93.105(c)(1)(v) describe transportation plan changes that require 
conformity determinations, but are not comprehensive transportation 
plan updates. EPA is changing references for transportation plan 
``revision(s)'' to be transportation plan ``amendment(s),'' to be 
consistent with the revised planning definitions in DOT's February 14, 
2007, final transportation planning regulations (72 FR 7224). Today's 
changes provide consistency between how mid-cycle transportation plan 
and TIP changes are currently described in the conformity rule. The 
revision does not change the substantive requirements for when a 
conformity determination is required for transportation plan changes. 
In addition, the minor wording change to Sec.  93.105(c)(1)(v) does not 
necessitate a conformity SIP revision. Three commenters supported the 
changes.

G. Minor Revision to Reference for Public Consultation Provision

    EPA is updating a reference in Sec.  93.105(e) of the conformity 
rule to be consistent with DOT's transportation planning regulations. 
Section 93.105(e) describes the procedures for consulting with the 
general public on conformity determinations. This provision now refers 
to 23 CFR 450.316(a) of DOT's transportation planning regulations, 
which describes how public involvement occurs during the development of 
transportation plans and TIPs. In its February 14, 2007, final rule (72 
FR 7224), DOT reorganized 23 CFR 450.316 to reflect the new SAFETEA-LU 
statute. DOT moved the public consultation procedures that EPA has 
historically relied upon in the conformity rule from 23 CFR 450.316(b) 
to 23 CFR 450.316(a). Today's final rule reflects this change in DOT's 
transportation planning regulations. Three commenters supported this 
change.
    This revision does not change the substantive requirements for the 
public consultation requirements for conformity determinations. In 
addition, today's change does not cause states to revise their 
conformity SIPs, since the revision involves an administrative change 
to one reference in DOT's regulations. EPA has not required conformity 
SIP revisions for similar reference changes in the past; the public 
participation requirements in existing approved conformity SIPs can be 
implemented as intended even if they do not reflect the most current 
citation in DOT's regulations.

XII. Statutory and Executive Order Reviews

A. Executive Order 12866: Regulatory Planning and Review

    This action is not a ``significant regulatory action'' under the 
terms of Executive Order (EO) 12866 (58 FR 51735, October 4, 1993) and 
is therefore not subject to review under the EO.

B. Paperwork Reduction Act

    Transportation conformity determinations are required under Clean 
Air Act section 176(c) (42 U.S.C. 7506(c)) to ensure that federally 
supported highway and transit project activities are consistent with 
(``conform to'') the purpose of the SIP. Conformity to the purpose of 
the SIP means that transportation activities will not cause or 
contribute to new air quality violations, worsen existing violations, 
or delay timely attainment of the relevant air quality standards. 
Transportation conformity applies under EPA's conformity regulations at 
40 CFR parts 51.390 and 93 to areas that are designated nonattainment 
and those redesignated to attainment after 1990 (``maintenance areas'' 
with SIPs developed under Clean Air Act section 175A) for 
transportation-source criteria pollutants. The Clean Air Act gives EPA 
the statutory authority to establish the criteria and procedures for 
determining whether transportation activities conform to the SIP.
    This action does not impose any new information collection burden 
or any new information collection requirements. The Office of 
Management and Budget has previously approved the information 
collection requirements under the provisions of the Paperwork Reduction 
Act, 44 U.S.C. 3501 et seq. The information collection requirements of 
EPA's existing transportation conformity rule and the revisions in 
today's action are addressed by two information collection requests 
(ICRs). Requirements for carbon monoxide, PM10, nitrogen 
dioxide, and 1-hour ozone nonattainment and maintenance areas are 
covered under the DOT ICR entitled, ``Metropolitan and Statewide 
Transportation Planning,'' with the OMB control number of 2132-0529. 
Requirements related to PM2.5 and 8-hour ozone nonattainment 
and maintenance areas are covered by the EPA ICR entitled, 
``Transportation Conformity Determinations for Federally Funded and 
Approved Transportation Plans, Programs and Projects Under the New 8-
hour Ozone and PM2.5 National Ambient Air Quality 
Standards,'' with OMB control number 2060-0561, EPA ICR number 2130.02. 
EPA is currently revising its ICR to cover all transportation 
conformity burden (EPA ICR No. 2130.03, OMB Control No. 2060-0561), and 
this ICR will incorporate the efficiencies in today's final rule.
    Burden means the total time, effort, or financial resources 
expended by persons to generate, maintain, retain, or disclose or 
provide information to or for a federal agency. This includes the time 
needed to review instructions; develop, acquire, install and utilize 
technology and systems for the purposes of collecting, validating, 
verifying, processing, maintaining, disclosing, and providing 
information; adjust the existing ways to

[[Page 4437]]

comply with any previously applicable instructions and requirements; 
train personnel to be able to respond to a collection of information; 
search data sources; complete and review the collection of information; 
and transmit or otherwise disclose the information.
    An agency may not collect information, and a person is not required 
to respond to an agency's request for information unless it has a 
currently valid OMB control number. The OMB control numbers for EPA's 
regulations in 40 CFR are listed in 40 CFR part 9.

C. Regulatory Flexibility Act

    The Regulatory Flexibility Act (RFA) generally requires an Agency 
to prepare a regulatory flexibility analysis of rules subject to notice 
and comment rulemaking requirements under the Administrative Procedure 
Act or any other statute unless the Agency certifies that the rule will 
not have a significant economic impact on a substantial number of small 
entities. Small entities include small businesses, small not-for-profit 
organizations and small government jurisdictions.
    For purposes of assessing the impacts of today's final rule on 
small entities, small entity is defined as: (1) A small business as 
defined by the Small Business Administration's (SBA) regulations at 13 
CFR 121.201; (2) a small governmental jurisdiction that is a government 
of a city, county, town, school district or special district with a 
population of less than 50,000; and (3) a small organization that is 
any not-for-profit enterprise that is independently owned and operated 
and is not dominant in its field.
    After considering the economic impacts of today's final rule on 
small entities, I certify that this action will not have a significant 
economic impact on a substantial number of small entities. This 
regulation directly affects federal agencies and metropolitan planning 
organizations that, by definition, are designated under federal 
transportation laws only for metropolitan areas with a population of at 
least 50,000. These organizations do not constitute small entities 
within the meaning of the Regulatory Flexibility Act.

D. Unfunded Mandates Reform Act

    Title II of the Unfunded Mandates Reform Act of 1995 (UMRA), Public 
Law 104-4, establishes requirements for federal agencies to assess the 
effects of their regulatory actions on state, local, and tribal 
governments and the private sector. Under section 202 of the UMRA, EPA 
generally must prepare a written statement, including a cost-benefit 
analysis, for proposed and final rules with ``federal mandates'' that 
may result in expenditures by state, local, and tribal governments, in 
the aggregate, or by the private sector, of $100 million or more in any 
one year. Before promulgating an EPA rule for which a written statement 
is needed, section 205 of the UMRA generally requires EPA to identify 
and consider a reasonable number of regulatory alternatives and adopt 
the least costly, most cost-effective or least burdensome alternative 
that achieves the objectives of the rule. The provisions of section 205 
do not apply when they are inconsistent with applicable law. Moreover, 
section 205 allows EPA to adopt an alternative other than the least 
costly, most cost-effective or least burdensome alternative if the 
Administrator publishes with the final rule an explanation why that 
alternative was not adopted. Before EPA establishes any regulatory 
requirements that may significantly or uniquely affect small 
governments, including tribal governments, it must have developed under 
section 203 of the UMRA a small government agency plan. The plan must 
provide for notifying potentially affected small governments, enabling 
officials of affected small governments to have meaningful and timely 
input in the development of EPA regulatory proposals with significant 
federal intergovernmental mandates, and informing, educating, and 
advising small governments on compliance with the regulatory 
requirements.
    EPA has determined that this rule itself does not contain a federal 
mandate that may result in expenditures of $100 million or more by 
state, local, and tribal governments, in the aggregate, or the private 
sector in any one year. The primary purpose of this rule is to amend 
the conformity rule to be consistent with Clean Air Act section 176(c) 
as amended by SAFETEA-LU. The Clean Air Act amendments made by SAFETEA-
LU were intended to reduce the burden of demonstrating conformity in 
designated nonattainment and maintenance areas subject to conformity 
requirements. Thus, although this rule explains how to implement these 
Clean Air Act amendments, it merely implements already established law 
that imposes conformity requirements and does not itself impose 
requirements that may result in expenditures of $100 million or more in 
any year. Thus, today's rule is not subject to the requirements of 
sections 202 and 205 of the UMRA and EPA has not prepared a statement 
with respect to budgetary impacts.
    EPA has determined that this rule contains no regulatory 
requirements that might significantly or uniquely affect small 
governments. This rule will not significantly or uniquely impact small 
governments because it directly affects federal agencies and 
metropolitan planning organizations that, by definition, are designated 
under federal transportation laws only for metropolitan areas with a 
population of at least 50,000. Additionally, this rule explains how to 
implement Clean Air Act requirements, as such it merely implements 
already established law that imposes conformity requirements and does 
not itself impose requirements.

E. Executive Order 13132: Federalism

    Executive Order 13132, entitled ``Federalism'' (64 FR 43255, August 
10, 1999), requires EPA to develop an accountable process to ensure 
``meaningful and timely input by State and local officials in the 
development of regulatory policies that have federalism implications.'' 
``Policies that have federalism implications'' is defined in the 
Executive Order to include regulations that have ``substantial direct 
effects on the States, on the relationship between the national 
government and the States, or on the distribution of power and 
responsibilities among the various levels of government.''
    This rule does not have federalism implications. It will not have 
substantial direct effects on states, on the relationship between the 
national government and states, or on the distribution of power and 
responsibilities among the various levels of government, as specified 
in Executive Order 13132. The Clean Air Act requires conformity to 
apply in certain nonattainment and maintenance areas as a matter of 
law, and this rule merely establishes and revises procedures for 
transportation planning entities in subject areas to follow in meeting 
their existing statutory obligations. Thus, Executive Order 13132 does 
not apply to this rule.

F. Executive Order 13175: Consultation and Coordination With Indian 
Tribal Governments

    Executive Order 13175: ``Consultation and Coordination with Indian 
Tribal Governments'' (65 FR 67249, November 6, 2000) requires EPA to 
develop an accountable process to ensure ``meaningful and timely input 
by tribal officials in the development of regulatory policies that have 
tribal implications.'' ``Policies that have tribal implications'' is 
defined in the Executive Order to include regulations that have 
``substantial direct effects on one or more Indian tribes, on the 
relationship between the federal

[[Page 4438]]

government and the Indian tribes, or on the distribution of power and 
responsibilities between the federal government and Indian tribes.''
    Today's amendments to the conformity rule do not significantly or 
uniquely affect the communities of Indian tribal governments, as the 
Clean Air Act requires transportation conformity to apply in any area 
that is designated nonattainment or maintenance by EPA. This rule 
amends the conformity rule to be consistent with Clean Air Act section 
176(c) as amended by SAFETEA-LU. The Clean Air Act amendments made by 
SAFETEA-LU affect nonattainment and maintenance areas subject to 
conformity requirements. This rule does not have tribal implcations, as 
specified in Executive Order 13175. Accordingly, Executive Order 13175 
does not apply to this rule.

G. Executive Order 13045: Protection of Children From Environmental 
Health and Safety Risks

    Executive Order 13045: ``Protection of Children from Environmental 
Health Risks and Safety Risks'' (62 FR 19885, April 23, 1997) applies 
to any rule that: (1) Is determined to be ``economically significant'' 
as defined under Executive Order 12866, and (2) concerns an 
environmental health or safety risk that EPA has reason to believe may 
have a disproportionate effect on children. If the regulatory action 
meets both criteria, the Agency must evaluate the environmental health 
or safety effects of the planned rule on children, and explain why the 
planned regulation is preferable to other potentially effective and 
reasonably feasible alternatives considered by the Agency.
    This rule is not subject to Executive Order 13045 because the 
Agency does not have reason to believe the environmental health or 
safety risks addressed by this action present a disproportionate risk 
to children.

H. Executive Order 13211: Actions That Significantly Affect Energy 
Supply, Distribution or Use

    This rule is not subject to Executive Order 13211, ``Action 
Concerning Regulations That Significantly Affect Energy Supply, 
Distribution, or Use'' (66 FR 28355; May 22, 2001) because it will not 
have a significant adverse effect on the supply, distribution, or use 
of energy. Further, we have determined that this rule is not likely to 
have any significant adverse effects on energy supply.

I. National Technology Transfer and Advancement Act

    Section 12(d) of the National Technology Transfer and Advancement 
Act of 1995 (``NTTAA''), Public Law No. 104-113, section 12(d) (15 
U.S.C. 272 note) directs EPA to use voluntary consensus standards in 
its regulatory activities unless to do so would be inconsistent with 
applicable law or otherwise impractical. Voluntary consensus standards 
are technical standards (e.g., material specifications, test methods, 
sampling procedures, and business practices) that are developed or 
adopted by voluntary consensus standards bodies. The NTTAA directs EPA 
to provide Congress, through OMB, explanations when the Agency decides 
not to use available and applicable voluntary consensus standards.
    This action does not involve technical standards. Therefore, EPA 
did not consider the use of any voluntary consensus standards.

J. Congressional Review Act

    The Congressional Review Act, 5 U.S.C. 801 et seq., as added by the 
Small Business Regulatory Enforcement Fairness Act of 1996, generally 
provides that before a rule may take effect, the agency promulgating 
the rule must submit a rule report, which includes a copy of the rule, 
to each House of the Congress and to the Comptroller General of the 
United States. EPA will submit a report containing this rule and other 
required information to the U.S. Senate, the U.S. House of 
Representatives, and the Comptroller General of the United States prior 
to publication of the rule in the Federal Register. A major rule cannot 
take effect until 60 days after it is published in the Federal 
Register. This action is not a ``major rule'' as defined by 5 U.S.C. 
804(2). This rule will be effective February 25, 2008.

List of Subjects in 40 CFR Parts 51 and 93

    Environmental protection, Administrative practice and procedure, 
Air pollution control, Carbon monoxide, Highways and roads, 
Intergovernmental relations, Mass transportation, Nitrogen Dioxide, 
Ozone, Particulate matter, Transportation, Volatile organic compounds.

    Dated: January 9, 2008.
Stephen L. Johnson,
Administrator.

0
For the reasons set out in the preamble, 40 CFR parts 51 and 93 are 
amended as follows:

PART 51--[AMENDED]

0
1. The authority citation for part 51 continues to read as follows:

    Authority: 23 U.S.C. 101; 42 U.S.C. 7401-7671q.

Subpart T--[Amended]

0
2. An authority citation for subpart T of part 51 is added to read as 
follows:

    Authority: 42 U.S.C. 7401-7671q.

0
3. Section 51.390 is revised to read as follows:

Sec.  51.390  Implementation plan revision.

    (a) Purpose and applicability. The federal conformity rules under 
part 93, subpart A, of this chapter, in addition to any existing 
applicable state requirements, establish the conformity criteria and 
procedures necessary to meet the requirements of Clean Air Act section 
176(c) until such time as EPA approves the conformity implementation 
plan revision required by this subpart. A state with an area subject to 
this subpart and part 93, subpart A, of this chapter must submit to EPA 
a revision to its implementation plan which contains criteria and 
procedures for DOT, MPOs and other state or local agencies to assess 
the conformity of transportation plans, programs, and projects, 
consistent with this subpart and part 93, subpart A, of this chapter. 
The federal conformity regulations contained in part 93, subpart A, of 
this chapter would continue to apply for the portion of the 
requirements that the state did not include in its conformity 
implementation plan and the portion, if any, of the state's conformity 
provisions that is not approved by EPA. In addition, any previously 
applicable implementation plan conformity requirements remain 
enforceable until the state submits a revision to its applicable 
implementation plan to specifically remove them and that revision is 
approved by EPA.
    (b) Conformity implementation plan content. To satisfy the 
requirements of Clean Air Act section 176(c)(4)(E), the implementation 
plan revision required by this section must include the following three 
requirements of part 93, subpart A, of this chapter: Sec. Sec.  93.105, 
93.122(a)(4)(ii), and 93.125(c). A state may elect to include any other 
provisions of part 93, subpart A. If the provisions of the following 
sections of part 93, subpart A, of this chapter are included, such 
provisions must be included in verbatim form, except insofar as needed 
to clarify or to give effect to a stated intent in the revision to 
establish criteria and procedures

[[Page 4439]]

more stringent than the requirements stated in this chapter: Sec. Sec.  
93.101, 93.102, 93.103, 93.104, 93.106, 93.109, 93.110, 93.111, 93.112, 
93.113, 93.114, 93.115, 93.116, 93.117, 93.118, 93.119, 93.120, 93.121, 
93.126, and 93.127. A state's conformity provisions may contain 
criteria and procedures more stringent than the requirements described 
in this subpart and part 93, subpart A, of this chapter only if the 
state's conformity provisions apply equally to non-federal as well as 
federal entities.
    (c) Timing and approval. A state must submit this revision to EPA 
by November 25, 1994 or within 12 months of an area's redesignation 
from attainment to nonattainment, if the state has not previously 
submitted such a revision. The state must also revise its conformity 
implementation plan within 12 months of the date of publication of any 
final amendments to Sec. Sec.  93.105, 93.122(a)(4)(ii), and 93.125(c), 
as appropriate. Any other portions of part 93, subpart A, of this 
chapter that the state has included in its conformity implementation 
plan and EPA has approved must be revised in the state's implementation 
plan and submitted to EPA within 12 months of the date of publication 
of any final amendments to such sections. EPA will provide DOT with a 
30-day comment period before taking action to approve or disapprove the 
submission. In order for EPA to approve the implementation plan 
revision submitted to EPA under this subpart, the plan revision must 
address and give full legal effect to the following three requirements 
of part 93, subpart A: Sec. Sec.  93.105, 93.122(a)(4)(ii), and 
93.125(c). Any other provisions that are incorporated into the 
conformity implementation plan must also be done in a manner that gives 
them full legal effect. Following EPA approval of the state conformity 
provisions (or a portion thereof) in a revision to the state's 
conformity implementation plan, conformity determinations will be 
governed by the approved (or approved portion of the) state criteria 
and procedures as well as any applicable portions of the federal 
conformity rules that are not addressed by the approved conformity SIP.

PART 93--[AMENDED]

0
4. The authority citation for part 93 continues to read as follows:

    Authority: 42 U.S.C. 7401-7671q.

0
5. Section 93.101 is amended by:
0
a. Revising the definitions for ``Metropolitan planning organization 
(MPO)'' and ``Transportation improvement program (TIP)''; and
0
b. Revising the first sentence of the definition for ``Transportation 
control measure (TCM)''.
    The revisions read as follows:

Sec.  93.101  Definitions.

* * * * *
    Metropolitan planning organization (MPO) means the policy board of 
an organization created as a result of the designation process in 23 
U.S.C. 134(d).
* * * * *
    Transportation control measure (TCM) is any measure that is 
specifically identified and committed to in the applicable 
implementation plan, including a substitute or additional TCM that is 
incorporated into the applicable SIP through the process established in 
CAA section 176(c)(8), that is either one of the types listed in CAA 
section 108, or any other measure for the purpose of reducing emissions 
or concentrations of air pollutants from transportation sources by 
reducing vehicle use or changing traffic flow or congestion conditions. 
* * *
    Transportation improvement program (TIP) means a transportation 
improvement program developed by a metropolitan planning organization 
under 23 U.S.C. 134(j).
* * * * *

Sec.  93.102  [Amended]

0
6. Section 93.102 is amended as follows:
0
a. In paragraph (b)(2)(v), by removing ``sulfur oxides 
(SOX)'' and adding in its place ``sulfur dioxide 
(SO2)''; and
0
b. In paragraph (b)(4), removing ``for 20 years from the date EPA 
approves the area's request under section 107(d) of the CAA for 
redesignation to attainment'' and adding in its place ``through the 
last year of a maintenance area's approved CAA section 175A(b) 
maintenance plan''.

0
7. Section 93.104 is amended as follows:
0
a. By revising paragraphs (b)(2), (b)(3), and (c)(3);
0
b. By revising paragraph (e) introductory text; and
0
c. By adding paragraph (f).

Sec.  93.104  Frequency of conformity determinations.

* * * * *
    (b) * * *
    (2) All transportation plan amendments must be found to conform 
before the transportation plan amendments are approved by the MPO or 
accepted by DOT, unless the amendment merely adds or deletes exempt 
projects listed in Sec.  93.126 or Sec.  93.127. The conformity 
determination must be based on the transportation plan and the 
amendment taken as a whole.
    (3) The MPO and DOT must determine the conformity of the 
transportation plan (including a new regional emissions analysis) no 
less frequently than every four years. If more than four years elapse 
after DOT's conformity determination without the MPO and DOT 
determining conformity of the transportation plan, a 12-month grace 
period will be implemented as described in paragraph (f) of this 
section. At the end of this 12-month grace period, the existing 
conformity determination will lapse.
    (c) * * *
    (3) The MPO and DOT must determine the conformity of the TIP 
(including a new regional emissions analysis) no less frequently than 
every four years. If more than four years elapse after DOT's conformity 
determination without the MPO and DOT determining conformity of the 
TIP, a 12-month grace period will be implemented as described in 
paragraph (f) of this section. At the end of this 12-month grace 
period, the existing conformity determination will lapse.
    (e) Triggers for transportation plan and TIP conformity 
determinations. Conformity of existing transportation plans and TIPs 
must be redetermined within two years of the following, or after a 12-
month grace period (as described in paragraph (f) of this section) the 
existing conformity determination will lapse, and no new project-level 
conformity determinations may be made until conformity of the 
transportation plan and TIP has been determined by the MPO and DOT:
* * * * *
    (f) Lapse grace period. During the 12-month grace period referenced 
in paragraphs (b)(3), (c)(3), and (e) of this section, a project may be 
found to conform according to the requirements of this part if:
    (1) The project is included in the currently conforming 
transportation plan and TIP (or regional emissions analysis); or
    (2) the project is included in the most recent conforming 
transportation plan and TIP (or regional emissions analysis).

Sec.  93.105  [Amended]

0
8. Section 93.105 is amended by removing ``revisions or'' in paragraph 
(c)(1)(v), and by removing the reference ``23 CFR 450.316(b)'' in 
paragraph (e) and adding in its place ``23 CFR 450.316(a)''.

0
9. Section 93.106 is amended as follows:
0
a. By revising the section heading;

[[Page 4440]]

0
b. By revising paragraphs (a)(1)(iii) and (iv);
0
c. By adding new paragraph (a)(v);
0
d. By redesignating paragraph (d) as paragraph (e); and
0
e. By adding new paragraph (d).

Sec.  93.106  Content of transportation plans and timeframe of 
conformity determinations.

    (a) * * *
    (1) * * *
    (iii) The attainment year must be a horizon year if it is in the 
timeframe of the transportation plan and conformity determination;
    (iv) The last year of the transportation plan's forecast period 
must be a horizon year; and
    (v) If the timeframe of the conformity determination has been 
shortened under paragraph (d) of this section, the last year of the 
timeframe of the conformity determination must be a horizon year.
* * * * *
    (d) Timeframe of conformity determination.
    (1) Unless an election is made under paragraph (d)(2) or (d)(3) of 
this section, the timeframe of the conformity determination must be 
through the last year of the transportation plan's forecast period.
    (2) For areas that do not have an adequate or approved CAA section 
175A(b) maintenance plan, the MPO may elect to shorten the timeframe of 
the transportation plan and TIP conformity determination, after 
consultation with state and local air quality agencies, solicitation of 
public comments, and consideration of such comments.
    (i) The shortened timeframe of the conformity determination must 
extend at least to the latest of the following years:
    (A) The tenth year of the transportation plan;
    (B) The latest year for which an adequate or approved motor vehicle 
emissions budget(s) is established in the submitted or applicable 
implementation plan; or
    (C) The year after the completion date of a regionally significant 
project if the project is included in the TIP or the project requires 
approval before the subsequent conformity determination.
    (ii) The conformity determination must be accompanied by a regional 
emissions analysis (for informational purposes only) for the last year 
of the transportation plan and for any year shown to exceed motor 
vehicle emissions budgets in a prior regional emissions analysis, if 
such a year extends beyond the timeframe of the conformity 
determination.
    (3) For areas that have an adequate or approved CAA section 175A(b) 
maintenance plan, the MPO may elect to shorten the timeframe of the 
conformity determination to extend through the last year of such 
maintenance plan after consultation with state and local air quality 
agencies, solicitation of public comments, and consideration of such 
comments.
    (4) Any election made by an MPO under paragraphs (d)(2) or (d)(3) 
of this section shall continue in effect until the MPO elects 
otherwise, after consultation with state and local air quality 
agencies, solicitation of public comments, and consideration of such 
comments.
* * * * *

Sec.  93.109  [Amended]

0
10. Section 93.109 is amended as follows:
0
a. By revising the introductory text of paragraph (e)(2);
0
b. By removing paragraph (e)(2)(v); and
0
c. By revising paragraph (l)(2)(i):

Sec.  93.109  Criteria and procedures for determining conformity of 
transportation plans, programs, and projects: General.

* * * * *
    (e) * * *
    (2) Prior to paragraph (e)(1) of this section applying, the 
following test(s) must be satisfied:
* * * * *
    (1) * * *
    (2) * * *
    (i) When the requirements of Sec. Sec.  93.106(d), 93.116, 93.118, 
and 93.119 apply to isolated rural nonattainment and maintenance areas, 
references to ``transportation plan'' or ``TIP'' should be taken to 
mean those projects in the statewide transportation plan or statewide 
TIP which are in the rural nonattainment or maintenance area. When the 
requirements of Sec.  93.106(d) apply to isolated rural nonattainment 
and maintenance areas, references to ``MPO'' should be taken to mean 
the state department of transportation.

0
11. Section 93.114 is amended by revising the introductory text to read 
as follows:

Sec.  93.114  Criteria and procedures: Currently conforming 
transportation plan and TIP.

    There must be a currently conforming transportation plan and 
currently conforming TIP at the time of project approval, or a project 
must meet the requirements in Sec.  93.104(f) during the 12-month lapse 
grace period.
* * * * *

0
12. Section 93.115 is amended by revising the section heading and 
adding a new paragraph (e) to read as follows:

Sec.  93.115  Criteria and procedures: Projects from a transportation 
plan and TIP.

* * * * *
    (e) Notwithstanding the requirements of paragraphs (a), (b), and 
(c) of this section, a project must meet the requirements of Sec.  
93.104(f) during the 12-month lapse grace period.

0
13. Section 93.116(a) is amended in the fourth sentence by removing 
``(or regional emissions analysis)''.

0
14. Section 93.118 is amended as follows:
0
a. By revising paragraph (b) introductory text;
0
b. By revising the first sentence in paragraph (d)(2); and
0
c. By adding new paragraph (d)(3).

Sec.  93.118  Criteria and procedures: Motor vehicle emissions budget.

* * * * *
    (b) Consistency with the motor vehicle emissions budget(s) must be 
demonstrated for each year for which the applicable (and/or submitted) 
implementation plan specifically establishes motor vehicle emissions 
budget(s), for the attainment year (if it is within the timeframe of 
the transportation plan and conformity determination), for the last 
year of the timeframe of the conformity determination (as described 
under Sec.  93.106(d)), and for any intermediate years within the 
timeframe of the conformity determination as necessary so that the 
years for which consistency is demonstrated are no more than ten years 
apart, as follows:
* * * * *
    (d) * * *
    (2) The regional emissions analysis may be performed for any years 
in the timeframe of the conformity determination (as described under 
Sec.  93.106(d)) provided they are not more than ten years apart and 
provided the analysis is performed for the attainment year (if it is in 
the timeframe of the transportation plan and conformity determination) 
and the last year of the timeframe of the conformity determination. * * 
*
    (3) When the timeframe of the conformity determination is shortened 
under Sec.  93.106(d)(2), the conformity determination must be 
accompanied by a regional emissions analysis (for informational 
purposes only) for the last year of the transportation plan, and for 
any year shown to exceed motor vehicle emissions budgets in a prior 
regional emissions analysis (if such a year

[[Page 4441]]

extends beyond the timeframe of the conformity determination).
* * * * *

0
15. Section 93.119 is amended as follows:
0
a. In paragraph (f)(10), by removing ``SOX'' and adding 
``SO2'' in its place;
0
b. By revising the last sentence in paragraph (g)(1); and
0
c. By adding new paragraph (g)(3).

Sec.  93.119  Criteria and procedures: Interim emissions in areas 
without motor vehicle emissions budgets.

* * * * *
    (g) * * *
    (1) * * * The last year of the timeframe of the conformity 
determination (as described under Sec.  93.106(d)) must also be an 
analysis year.
* * * * *
    (3) When the timeframe of the conformity determination is shortened 
under Sec.  93.106(d)(2), the conformity determination must be 
accompanied by a regional emissions analysis (for informational 
purposes only) for the last year of the transportation plan.
* * * * *

0
16. Section 93.120 is amended by revising paragraph (a)(2) to read as 
follows:

Sec.  93.120  Consequences of control strategy implementation plan 
failures.

    (a) * * *
    (2) If EPA disapproves a submitted control strategy implementation 
plan revision without making a protective finding, only projects in the 
first four years of the currently conforming transportation plan and 
TIP or that meet the requirements of Sec.  93.104(f) during the 12-
month lapse grace period may be found to conform. This means that 
beginning on the effective date of a disapproval without a protective 
finding, no transportation plan, TIP, or project not in the first four 
years of the currently conforming transportation plan and TIP or that 
meets the requirements of Sec.  93.104(f) during the 12-month lapse 
grace period may be found to conform until another control strategy 
implementation plan revision fulfilling the same CAA requirements is 
submitted, EPA finds its motor vehicle emissions budget(s) adequate 
pursuant to Sec.  93.118 or approves the submission, and conformity to 
the implementation plan revision is determined.
* * * * *

0
17. Section 93.121 is amended by revising paragraphs (a)(1) and (2) to 
read as follows:

Sec.  93.121  Requirements for adoption or approval of projects by 
other recipients of funds designated under title 23 U.S.C. or the 
Federal Transit Laws.

    (a) * * *
    (1) The project comes from the currently conforming transportation 
plan and TIP (or meets the requirements of Sec.  93.104(f) during the 
12-month lapse grace period), and the project's design concept and 
scope have not changed significantly from those that were included in 
the regional emissions analysis for that transportation plan and TIP;
    (2) The project is included in the regional emissions analysis for 
the currently conforming transportation plan and TIP conformity 
determination (or meets the requirements of Sec.  93.104(f) during the 
12-month lapse grace period), even if the project is not strictly 
included in the transportation plan or TIP for the purpose of MPO 
project selection or endorsement, and the project's design concept and 
scope have not changed significantly from those that were included in 
the regional emissions analysis; or
* * * * *
0
18. Section 93.123 is amended by adding paragraph (a)(3) and revising 
paragraph (b)(1)(i) to read as follows:

Sec.  93.123  Procedures for determining localized CO, PM10, and PM2.5 
concentrations (hot-spot analysis).

    (a) * * *
    (3) DOT, in consultation with EPA, may also choose to make a 
categorical hot-spot finding that (93.116(a) is met without further 
hot-spot analysis for any project described in paragraphs (a)(1) and 
(a)(2) of this section based on appropriate modeling. DOT, in 
consultation with EPA, may also consider the current air quality 
circumstances of a given CO nonattainment or maintenance area in 
categorical hot-spot findings for applicable FHWA or FTA projects.
    (b) * * *
    (1) * * *
    (i) New highway projects that have a significant number of diesel 
vehicles, and expanded highway projects that have a significant 
increase in the number of diesel vehicles;
* * * * *

Sec.  93.126  [Amended]

0
19. Table 2 in Sec.  93.126 is amended under the heading ``Safety'' as 
follows:
0
a. By removing the entry ``Hazard elimination program'' and adding in 
its place ``Projects that correct, improve, or eliminate a hazardous 
location or feature'';
0
b. By removing the entry ``Safety improvement program'' and adding in 
its place ``Highway Safety Improvement Program implementation''; and
0
c. By removing the entry ``Pavement marking demonstration'' and adding 
in its place ``Pavement marking''.

[FR Doc. E8-597 Filed 1-23-08; 8:45 am]

BILLING CODE 6560-50-P