Multi-Pollutant Emissions Benefits of Transportation Strategies
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

For very narrow results

When looking for a specific result

Best used for discovery & interchangable words

Recommended to be used in conjunction with other fields

Dates

to

Document Data
Library
People
Clear All
Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Multi-Pollutant Emissions Benefits of Transportation Strategies

Filetype[PDF-1.28 MB]


English
Details Supporting Files You May Also Like

Details:

  • Creators:
    Schreffler, Eric
  • Corporate Creators:
    ICF International (Firm)
  • Corporate Contributors:
    Federal Highway Administration (U.S.)
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA-HEP-07-004
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    United States
  • Edition:
    Final Report
  • Corporate Publisher:
    Federal Highway Administration (U.S.)
  • Abstract:
    The National Ambient Air Quality Standards (NAAQS) are Federal standards that set the allowable concentrations and exposure limits for certain pollutants. Air quality standards have been established for several pollutants associated with transportation, including carbon monoxide (CO), ozone, and particulate matter (PM-10 and PM-2.5). If monitored levels violate the NAAQS, then the Environmental Protection Agency (EPA), in cooperation with the State, will designate the contributing area as “nonattainment.” In addition to direct pollutant emissions, motor vehicles emit precursors that contribute to pollutant concentrations, including nitrogen oxides (NOx), volatile organic compounds (VOCs), sulfur oxides (SOx), and ammonia (NH3). Transportation is a major source of air pollutant emissions. Nationally, on-road transportation sources are responsible for 27 percent of VOCs emissions, 35 percent of NOx emissions, and 55 percent of CO emissions.1 Although emissions from most transportation sources have been declining for the last two decades, and are projected to continue to decline due to the beneficial effects of improved emission control technologies and more stringent emission regulations, transportation will continue to contribute to regional air pollution for years to come.

    Transportation agencies have a long history of implementing strategies to reduce air pollutant emissions. Since 1991, the Congestion Mitigation and Air Quality Improvement (CMAQ) program has devoted more than $14 billion in highway funds for projects that reduce emissions and relieve congestion, most of which have been implemented by transportation agencies.2 Some State Implementation Plans (SIPs) include transportation control measures (TCMs), many of which are implemented by state, regional or local transportation agencies. Thus, there is a wealth of experience implementing emission reduction strategies by transportation agencies.

  • Format:
    PDF
  • Collection(s):
  • Main Document Checksum:
  • Download URL:
  • File Type:

Supporting Files

More +

You May Also Like

Checkout today's featured content at rosap.ntl.bts.gov