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# Highway Performance Monitoring System (HPMS) 

## Reducing Vehicle Miles Traveled - Statutory Language

The goal of reducing vehicle miles traveled (VMT) is an official goal of the U.S. Government policy as it is stated in sections of the Clean Air Act (CAA), the President's 1993 Climate Change Action Plan (CCAP), and in the Congestion Mitigation Air Quality Improvement Program (CMAQ) included in both the Intermodal Surface Transportation Efficiency Act (ISTEA) and the Transportation Equity Act for the 21st Century (TEA-21), U.S.C. 23, Section 149. The relevant sections of the CAA, CCAP, and CMAQ are reproduced below.

### CAA Section 182 (c) (5) reads:

(5) Transportation control. (A) Beginning 6 years after the date of the enactment  of the Clean Air Act Amendments of 1990 and each third year thereafter, the  State shall submit a demonstration as to whether current aggregate vehicle  mileage, aggregate vehicle emissions, congestion levels, and other relevant  parameters are consistent with those used for the area's demonstration of attainment.  Where such parameters and emissions levels exceed the levels projected for  purposes of the area's attainment demonstration, the State shall within 18  months develop and submit a revision of the applicable implementation plan  that includes a transportation control measures program consisting of measures  from, but not limited to, section 108(f) that will reduce emissions to levels  that are consistent with emission levels projected in such demonstration. In  considering such measures, the State should ensure adequate access to downtown,  other commercial, and residential areas and should avoid measures that increase  or relocate emissions and congestion rather than reduce them. Such revision  shall be developed in accordance with guidance issued by the Administrator  pursuant to section 108(e) and with the requirements of section 174(b) and  shall include implementation and funding schedules that achieve expeditious  emissions reductions in accordance with implementation plan projections.

#### **CAA Section 182 (d) (1) reads:**

(1) Vehicle miles traveled. (A) Within 2 years after the date of enactment  of the Clean Air Act Amendments of 1990, the State shall submit a revision  that identifies and adopts specific enforceable transportation control strategies  and transportation control measures to offset any growth in emissions from  growth in vehicle miles traveled or numbers of vehicle trips in such areas  and to attain reduction in motor vehicle emissions as necessary, in combination  with other emission reduction requirements of this subpart, to comply with  the requirements of subsection (b)(2)(B) and (c)(2)(B) (pertaining to periodic  emissions reduction requirements). The State shall consider measures specified  in section 108(f), and choose from among and implement such measures as necessary  to demonstrate attainment with the national ambient air quality standards;  in considering such measures, the State should ensure adequate access to downtown,  other commercial, and residential areas and should avoid measures that increase  or relocate emissions and congestion rather than reduce them.

### CAA Section 187 (a) (2) (A) reads:

Vehicle miles traveled. No later than 2 years after the date of the enactment of the Clean Air Act Amendments of 1990, for areas with a design value above 12.7 ppm at the time of classification, the plan revision shall contain a forecast of vehicle miles traveled in the nonattainment area concerned for each year before the year in which the plan projects the national ambient air quality standard for carbon monoxide to be attained in the area. The forecast shall be based on guidance which shall be published by the Administrator, in consultation with the Secretary of Transportation, within 6 months after the date of the enactment of the Clean Air Act Amendments of 1990. The plan revision shall provide for annual updates of the forecasts to be submitted to the Administrator together with annual reports regarding the extent to which such forecasts proved to be accurate. Such annual reports shall contain estimates of actual vehicle miles traveled in each year for which a forecast was required.

### **CAA Section 187 (b) (2) reads:**

Vehicle miles traveled. Within 2 years after the date of the enactment of the Clean Air Act Amendments of 1990, the State shall submit a revision that includes the transportation control measures as required in section 182(d)(1) except that such revision shall be for the purpose of reducing CO emissions rather than volatile organic compound emissions. In the case of any such area (other than an area in New York State) which is a covered area (as defined in section 246(a)(2)(B)) for purposes of the Clean Fuel Fleet program under part C of title II, if the State fails to include any such measure, the implementation plan shall contain an explanation of why such measure was not adopted and what emissions reduction measure was adopted to provide a comparable reduction in emissions, or reasons why such reduction is not necessary to attain the national primary ambient air quality standard for carbon monoxide.

### **CCAP-Transportation Actions—page 18 reads:**

President Clinton directed: ... EPA, in consultation with DOT, to draft guidance documents that identify the air quality benefits of innovative transportation strategies to reduce vehicle miles traveled (VMT). These will be used by states and cities in their clean air program development. – Some states and cities have experimented with innovative programs, such as congestion pricing tolls and mass transit finance, which may have significant C02 as well as urban air pollution benefits. – EPA can help States and cities evaluate how well such strategies can work in attaining clean air quality standards, thereby encouraging the adoption of innovative programs.

### Department of Transportation, Congestion Mitigation and Air Quality Improvement Program,  U.S. Code, Title 23, Chapter 1, Section 149 reads:

(a) Establishment. The Secretary shall establish a congestion mitigation and  air quality improvement program in accordance with this section. (b) Eligible  Projects. – Except as provided in subsection (c), a State may obligate funds  apportioned to it under section 104(b)(2) for the congestion mitigation and  air quality improvement program only for a transportation project or program  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 (1)(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 clauses (xii)  and (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 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)); 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; (2) if the project or program  is included in a State implementation plan that has been approved pursuant  to the Clean Air Act and the project will have air quality benefits; (3) **the  Secretary, after consultation with the Administrator of the Environmental Protection  Agency, determines that the project or program is likely to contribute to the  attainment of a national ambient air quality standard, whether through reductions  in vehicle miles traveled, fuel consumption, or through other factors.**

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