The Clean Air Act, referred to in subsecs. (b), (d)(1), (3), (f)(5), and (g)(3), (4), is act July 14, 1955, ch. 360, 69 Stat. 322, which is classified generally to chapter 85 (§ 7401 et seq.) of Title 42, The Public Health and Welfare. Section 108(f)(1)(A) of the Act is classified to section 7408(f)(1)(A) of Title 42. For complete classification of this Act to the Code, see Short Title note set out under section 7401 of Title 42 and Tables.

The date of enactment of this paragraph, referred to in subsec. (b)(5), is the date of enactment of Pub. L. 105–178, which was approved June 9, 1998.

Sections 104(b)(2), 133, and 149(c)(2), as in effect on the day before the date of enactment of the MAP–21, referred to in subsec. (d)(2), mean section 104(b)(2) of this title, section 133 of this title, and subsec. (c)(2) of this section, respectively, as in effect on the day before the date of enactment of Pub. L. 112–141, which amended section 104 generally, made numerous amendments to section 133, and redesignated subsec. (c) of this section as (d) and struck it out. The date of enactment of the MAP–21 is deemed to be Oct. 1, 2012, see section 3(a), (b) of Pub. L. 112–141, set out as Effective and Termination Dates of 2012 Amendment notes under section 101 of this title.

The day before the date of enactment of MAP–21, referred to in subsec. (d)(3), means the day before the date of enactment of Pub. L. 112–141. See note above.

The date of enactment of this subsection, referred to in subsec. (g)(2)(B), is the date of enactment of Pub. L. 109–59, which was approved Aug. 10, 2005.

2015—Subsec. (b)(1)(A)(i)(I). Pub. L. 114–94, § 1114(1)(A), inserted “in the designated nonattainment area” after “air quality standard”.

Subsec. (b)(3). Pub. L. 114–94, § 1114(1)(B), inserted “or maintenance” after “likely to contribute to the attainment”.

Subsec. (b)(4). Pub. L. 114–94, § 1114(1)(C), substituted “attainment or maintenance in the area of” for “attainment of”.

Subsec. (b)(8)(A)(ii). Pub. L. 114–94, § 1114(1)(E)(i)(I), inserted “or port-related freight operations” after “construction projects” in introductory provisions.

Subsec. (b)(8)(A)(ii)(II). Pub. L. 114–94, § 1114(1)(E)(i)(II), inserted “or chapter 53 of title 49” after “this title”.

Subsec. (b)(9). Pub. L. 114–94, § 1114(1)(D), (E)(ii), (F), added par. (9).

Subsec. (c)(2). Pub. L. 114–94, § 1114(2), inserted “(giving priority to corridors designated under section 151)” after “at any location in the State”.

Subsec. (d)(1)(B). Pub. L. 114–94, § 1114(3)(A), amended subpar. (B) generally. Prior to amendment, subpar. (B) read as follows: “is eligible under the surface transportation program under section 133.”

Subsec. (d)(2)(A). Pub. L. 114–94, § 1114(3)(B)(i)(I), inserted “would otherwise be eligible under subsection (b) if the project were carried out in a nonattainment or maintenance area or” after “may use for any project that” in introductory provisions.

Pub. L. 114–94, § 1109(c)(5), substituted “surface transportation block grant program” for “surface transportation program” in introductory provisions.

Subsec. (d)(2)(A)(i). Pub. L. 114–94, § 1114(3)(B)(i)(II), substituted “subsection (k)(1)” for “paragraph (l)”.

Subsec. (d)(2)(B)(i). Pub. L. 114–94, § 1114(3)(B)(ii), substituted “MAP–21” for “MAP–21t”.

Subsec. (d)(3). Pub. L. 114–94, § 1114(3)(C), inserted “, in a manner consistent with the approach that was in effect on the day before the date of enactment of MAP–21,” after “the Secretary shall modify”.

Subsec. (g)(2)(B). Pub. L. 114–94, § 1114(4), substituted “not later than” for “not later that”.

Subsec. (k)(3), (4). Pub. L. 114–94, § 1114(5), added pars. (3) and (4).

Subsec. (l)(1)(B). Pub. L. 114–94, § 1114(6), inserted “air quality and traffic congestion” before “performance targets”.

Subsec. (m). Pub. L. 114–94, § 1114(7), substituted “section 104(b)(4)” for “section 104(b)(2)”.

2014—Subsec. (m). Pub. L. 113–76 substituted “for which CMAQ funding was made available, obligated or expended in fiscal year 2012, and shall have no imposed time limitation” for “that was previously eligible under this section”.

2012—Subsec. (b). Pub. L. 112–141, § 1113(a)(1), (5), in introductory provisions, substituted “in subsection (d)” for “in subsection (c)” and “section 104(b)(4)” for “section 104(b)(2)” and struck out concluding provisions which read as follows: “No funds may be provided under this section for a project which will result in the construction of new capacity available to single occupant vehicles unless the project consists of a high occupancy vehicle facility available to single occupant vehicles only at other than peak travel times. In areas of a State which are nonattainment for ozone or carbon monoxide, or both, and for PM–10 resulting from transportation activities, the State may obligate such funds for any project or program under paragraph (1) or (2) without regard to any limitation of the Department of Transportation relating to the type of ambient air quality standard such project or program addresses.”

Subsec. (b)(5). Pub. L. 112–141, § 1113(a)(2), inserted “add turning lanes,” after “improve intersections,” and substituted “paragraph, including programs or projects to improve incident and emergency response or improve mobility, such as through real-time traffic, transit, and multimodal traveler information;” for “paragraph;”.

Subsec. (b)(7). Pub. L. 112–141, § 1113(a)(3), (7), added par. (7). Former par. (7) redesignated (8).

Subsec. (b)(7)(A)(ii). Pub. L. 112–141, § 1113(a)(4), substituted “verified technologies (as defined in section 791 of the Energy Policy Act of 2005 (42 U.S.C. 16131))” for “published in the list under subsection (f)(2)” in introductory provisions.

Subsec. (b)(8). Pub. L. 112–141, § 1113(a)(6), redesignated par. (7) as (8).

Subsec. (c). Pub. L. 112–141, § 1113(b)(2), added subsec. (c). Former subsec. (c) redesignated (d).

Subsec. (d). Pub. L. 112–141, § 1113(b)(3), added subsec. (d) and struck out former subsec. (d) which related to states receiving minimum apportionment.

Pub. L. 112–141, § 1113(b)(1), redesignated subsec. (c) as (d). Former subsec. (d) redesignated (e).

Subsec. (e). Pub. L. 112–141, § 1113(b)(1), redesignated subsec. (d) as (e). Former subsec. (e) redesignated (f).

Subsec. (f). Pub. L. 112–141, § 1113(b)(1), (4), redesignated subsec. (e) as (f) and substituted “104(b)(4)” for “104(b)(2)” in par. (3). Former subsec. (f) redesignated (g).

Subsec. (g). Pub. L. 112–141, § 1113(b)(1), (5), redesignated subsec. (f) as (g), added par. (3), and struck out former par. (3) which related to priority. Former subsec. (g) redesignated (h).

Subsec. (h). Pub. L. 112–141, § 1113(b)(1), redesignated subsec. (g) as (h). Former subsec. (h) redesignated (i).

Subsec. (i). Pub. L. 112–141, § 1113(b)(6), added subsec. (i) and struck out former subsec. (i) which related to evaluation and assessment of projects.

Pub. L. 112–141, § 1113(b)(1), redesignated subsec. (h) as (i).

Subsecs. (j) to (m). Pub. L. 112–141, § 1113(b)(6), added subsecs. (j) to (m).

2005—Subsec. (b). Pub. L. 109–59, § 1808(a), inserted “or is required to prepare, and file with the Administrator of the Environmental Protection Agency, maintenance plans under the Clean Air Act (42 U.S.C. 7401 et seq.)” after “1997,” in introductory provisions.

Subsec. (b)(1). Pub. L. 109–59, § 1808(b)(1), added par. (1) and struck out former par. (1) which read as follows:

“(A) if the Secretary, after consultation with the Administrator of the Environmental Protection Agency, determines, on the basis of information published by the Environmental Protection Agency pursuant to section 108(f)(1)(A) of the Clean Air Act (other than clause (xvi) of such section), that the project or program is likely to contribute to—

“(i) the attainment of a national ambient air quality standard; or

“(ii) the maintenance of a national ambient air quality standard in a maintenance area; or

“(B) in any case in which such information is not available, if the Secretary, after such consultation, determines that the project or program is part of a program, method, or strategy described in such section;”.

Subsec. (b)(4). Pub. L. 109–59, § 1808(b)(2)(A), inserted “, including advanced truck stop electrification systems,” after “control facility or program”.

Subsec. (b)(5). Pub. L. 109–59, § 1808(b)(3)(A), inserted “improve transportation systems management and operations that mitigate congestion and improve air quality,” after “intersections,”.

Subsec. (b)(6), (7). Pub. L. 109–59, § 1808(b)(2)(B), (3)(B), (4), which directed addition of pars. (6) and (7) at end of subsec. (b), was executed by adding pars. (6) and (7) after par. (5) to reflect the probable intent of Congress.

Subsec. (c)(1). Pub. L. 109–59, § 1808(c)(1), substituted “for any project in the State that—” and subpars. (A) and (B) for “for any project eligible under the surface transportation program under section 133.”

Subsec. (c)(2). Pub. L. 109–59, § 1808(c)(2), substituted “for any project in the State that—” and subpars. (A) and (B) for “for any project in the State eligible under section 133.”

Subsecs. (f) to (h). Pub. L. 109–59, § 1808(d)–(f), added subsecs. (f) to (h).

1998—Subsec. (a). Pub. L. 105–178, § 1110(a), substituted “shall establish and implement” for “shall establish”.

Subsec. (b). Pub. L. 105–178, § 1110(b)(1), in introductory provisions, substituted “that is or was designated as a nonattainment area for ozone, carbon monoxide, or particulate matter under section 107(d) of the Clean Air Act (42 U.S.C. 7407(d)) and classified pursuant to section 181(a), 186(a), 188(a), or 188(b) of the Clean Air Act (42 U.S.C. 7511(a), 7512(a), 7513(a), or 7513(b)) or is or was designated as a nonattainment area under such section 107(d) after December 31, 1997,” for “that was designated as a nonattainment area under section 107(d) of the Clean Air Act (42 U.S.C. 7407(d)) during any part of fiscal year 1994”.

Subsec. (b)(1)(A). Pub. L. 105–178, § 1110(b)(2), substituted “clause (xvi) of such section” for “clauses (xii) and (xvi) of such section”.

Subsec. (b)(1)(A)(ii). Pub. L. 105–178, § 1110(b)(3), substituted “a maintenance area” for “an area that was designated as a nonattainment area but that was later redesignated by the Administrator of the Environmental Protection Agency as an attainment area under section 107(d) of the Clean Air Act (42 U.S.C. 7407(d))”.

Subsec. (b)(5). Pub. L. 105–178, § 1110(b)(4)–(6), added par. (5).

Subsec. (c). Pub. L. 105–178, § 1110(c), added subsec. (c) and struck out heading and text of former subsec. (c). Text read as follows: “If a State does not have a nonattainment area for ozone or carbon monoxide under the Clean Air Act located within its borders, the State may use funds apportioned to it under section 104(b)(2) for any project eligible for assistance under the surface transportation program.”

Subsec. (e). Pub. L. 105–178, § 1110(d)(1), added subsec. (e).

1995—Subsec. (b). Pub. L. 104–59, § 319(a)(1)(A), in introductory provisions, inserted “if the project or program is for an area in the State that was designated as a nonattainment area under section 107(d) of the Clean Air Act (42 U.S.C. 7407(d)) during any part of fiscal year 1994 and” after “project or program”.

Subsec. (b)(1)(A). Pub. L. 104–59, § 319(a)(1)(B), substituted “contribute to—” and cls. (i) and (ii) for “contribute to the attainment of a national ambient air quality standard; or”.

Subsec. (b)(2). Pub. L. 104–59, § 319(b)(1), struck out “or” at end.

Subsec. (b)(3). Pub. L. 104–88, § 405(b)(1), inserted “or” after semicolon at end.

Pub. L. 104–59, § 319(b)(2), substituted a semicolon for period at end.

Subsec. (b)(4). Pub. L. 104–88, § 405(b)(2), substituted a period for “; or” at end.

Pub. L. 104–59, § 319(b)(3), as amended by Pub. L. 104–88, § 405(a)(2), added par. (4).

1992—Subsec. (b). Pub. L. 102–388 inserted at end “In areas of a State which are nonattainment for ozone or carbon monoxide, or both, and for PM–10 resulting from transportation activities, the State may obligate such funds for any project or program under paragraph (1) or (2) without regard to any limitation of the Department of Transportation relating to the type of ambient air quality standard such project or program addresses.”

1991—Pub. L. 102–240 substituted section catchline for one which read: “Truck lanes” and amended text generally. Prior to amendment, text read as follows: “The Secretary may approve as a project on any Federal-aid system the construction of exclusive or preferential truck lanes.”

Amendment by Pub. L. 114–94 effective Oct. 1, 2015, see section 1003 of Pub. L. 114–94, set out as a note under section 5313 of Title 5, Government Organization and Employees.

Amendment by Pub. L. 112–141 effective Oct. 1, 2012, see section 3(a) of Pub. L. 112–141, set out as an Effective and Termination Dates of 2012 Amendment note under section 101 of this title.

Amendment by section 405(b) of Pub. L. 104–88 effective Jan. 1, 1996, see section 2 of Pub. L. 104–88, set out as an Effective Date note under section 1301 of Title 49, Transportation.

Pub. L. 104–88, title IV, § 405(a), Dec. 29, 1995, 109 Stat. 956, provided that the amendment made by section 405(a)(2) is effective Nov. 28, 1995.

Amendment by Pub. L. 102–240 effective Dec. 18, 1991, and applicable to funds authorized to be appropriated or made available after Sept. 30, 1991, and, with certain exceptions, not applicable to funds appropriated or made available on or before Sept. 30, 1991, see section 1100 of Pub. L. 102–240, set out as a note under section 104 of this title.

Pub. L. 105–178, title I, § 1110(d)(2), June 9, 1998, 112 Stat. 144, as amended by Pub. L. 105–206, title IX, § 9002(g), July 22, 1998, 112 Stat. 836, provided that: “For the purposes of section 149(e) [now 149(f)] of title 23, United States Code, the Secretary shall determine in accordance with the procedures specified in section 149(b) of such title whether water-phased hydrocarbon fuel emulsion technologies that consist of a hydrocarbon base and water in an amount not less than 20 percent by volume reduce emissions of hydrocarbon, particulate matter, carbon monoxide, or nitrogen oxide from motor vehicles.”

Pub. L. 105–178, title I, § 1110(e), June 9, 1998, 112 Stat. 144, provided that: “(1) In general.—The Secretary and the Administrator of the Environmental Protection Agency shall enter into arrangements with the National Academy of Sciences to complete, by not later than January 1, 2001, a study of the congestion mitigation and air quality improvement program under section 149 of title 23, United States Code. The study shall, at a minimum—“(A) evaluate the air quality impacts of emissions from motor vehicles; “(B) evaluate the negative effects of traffic congestion, including the economic effects of time lost due to congestion; “(C) determine the amount of funds obligated under the program and make a comprehensive analysis of the types of projects funded under the program; “(D) evaluate the emissions reductions attributable to projects of various types that have been funded under the program; “(E) assess the effectiveness, including the quantitative and nonquantitative benefits, of projects funded under the program and include, in the assessment, an estimate of the cost per ton of pollution reduction; “(F) assess the cost effectiveness of projects funded under the program with respect to congestion mitigation; “(G) compare—“(i) the costs of achieving the air pollutant emissions reductions achieved under the program; to “(ii) the costs that would be incurred if similar reductions were achieved by other measures, including pollution controls on stationary sources; “(H) include recommendations on improvements, including other types of projects, that will increase the overall effectiveness of the program; “(I) include recommendations on expanding the scope of the program to address traffic-related pollutants that, as of the date of the study, are not addressed by the program. “(2) Report.—Not later than January 1, 2000, the National Academy of Sciences shall transmit to the Secretary, the Committee on Transportation and Infrastructure and the Committee on Commerce of the House of Representatives, and the Committee on Environment and Public Works of the Senate a report on the results of the study with recommendations for modifications to the congestion mitigation and air quality improvement program in light of the results of the study. “(3) Funding.—Before making the apportionment of funds under [former] section 104(b)(2) of title 23, United States Code, for each of fiscal years 1999 and 2000, the Secretary shall deduct from the amount to be apportioned under such section for such fiscal year, and make available, $500,000 for such fiscal year to carry out this subsection.”

Notwithstanding any other provision of law, for each of fiscal years 1996 and 1997, amendment by section 319(a)(1) of Pub. L. 104–59 not to affect any apportionment adjustments under section 1015 of the Intermodal Surface Transportation Efficiency Act of 1991, Pub. L. 102–240, see section 319(c) of Pub. L. 104–59, set out as a note under section 104 of this title.

Pub. L. 102–240, title I, § 1012(b), Dec. 18, 1991, 105 Stat. 1938, as amended by Pub. L. 104–59, title III, § 325(e), Nov. 28, 1995, 109 Stat. 592; Pub. L. 105–178, title I, § 1216(a), June 9, 1998, 112 Stat. 211; Pub. L. 105–206, title IX, § 9006(b), July 22, 1998, 112 Stat. 848; Pub. L. 109–59, title I, § 1604(a), Aug. 10, 2005, 119 Stat. 1249, provided that: “(1) The Secretary shall solicit the participation of State and local governments and public authorities for one or more value pricing pilot programs. The Secretary may enter into cooperative agreements with as many as 15 such State or local governments or public authorities to establish, maintain, and monitor value pricing programs. “(2) Notwithstanding section 129 of title 23, United States Code, the Federal share payable for such programs shall be 80 percent. The Secretary shall fund all preimplementation costs and project design, and all of the development and other start up costs of such projects, including salaries and expenses, for a period of at least 1 year, and thereafter until such time that sufficient revenues are being generated by the program to fund its operating costs without Federal participation, except that the Secretary may not fund the preimplementation or implementation costs of any project for more than 3 years. “(3) Revenues generated by any pilot project under this subsection must be applied to projects eligible under such title. “(4) Notwithstanding sections 129 and 301 of title 23, United States Code, the Secretary shall allow the use of tolls on the Interstate System as part of any value pricing pilot program under this subsection. “(5) The Secretary shall monitor the effect of such programs for a period of at least 10 years, and shall report to the Committee on Environment and Public Works of the Senate and the Committee on Transportation and Infrastructure of the House of Representatives every 2 years on the effects such programs are having on driver behavior, traffic volume, transit ridership, air quality, and availability of funds for transportation programs. “(6) HOV passenger requirements.—Notwithstanding section 102(a) of title 23, United States Code, a State may permit vehicles with fewer than 2 occupants to operate in high occupancy vehicle lanes if the vehicles are part of a value pricing pilot program under this subsection. “(7) Financial effects on low-income drivers.—Any value pricing pilot program under this subsection shall include, if appropriate, an analysis of the potential effects of the pilot program on low-income drivers and may include mitigation measures to deal with any potential adverse financial effects on low-income drivers. “(8) Funding.—“(A) In general.—There are authorized to be appropriated to the Secretary from the Highway Trust Fund (other than the Mass Transit Account) to carry out this subsection—“(i) for fiscal year 2005, $11,000,000; and “(ii) for each of fiscal years 2006 through 2009, $12,000,000. “(B) Set-aside for projects not involving highway tolls.—Of the amounts made available to carry out this subsection, $3,000,000 for each of fiscal years 2006 through 2009 shall be available only for congestion pricing pilot projects that do not involve highway tolls. “(C) Availability.—Funds allocated by the Secretary to a State under this subsection shall remain available for obligation by the State for a period of 3 years after the last day of the fiscal year for which the funds are authorized. “(D) Use of unallocated funds.—If the total amount of funds made available from the Highway Trust Fund to carry out this subsection for fiscal year 1998 and fiscal years thereafter but not allocated exceeds $8,000,000 as of September 30 of any year, the excess amount—“(i) shall be apportioned in the following fiscal year by the Secretary to all States in accordance with [former] section 104(b)(3) of title 23, United States Code; “(ii) shall be considered to be a sum made available for expenditure on the surface transportation program, except that the amount shall not be subject to section 133(d) of such title; and “(iii) shall be available for any purpose eligible for funding under section 133 of such title. “(C) [probably should be (E)] Contract authority.—Funds authorized to carry out this subsection shall be available for obligation in the same manner as if the funds were apportioned under chapter 1 of title 23, United States Code; except that the Federal share of the cost of any project under this subsection and the availability of funds authorized to carry out this subsection shall be determined in accordance with this subsection.”