Research for the AASHTO Standing Committee on the Environment. Task 42. Determine Alternative Calculations for Fine Particulate Emission Factors other than AP-42 Applicable to Calculate Re-Entrained Dust on Transportation Projects

The US Environmental Protection Agency (EPA) emission factor document called "AP-42" provides emission factors for emissions of particulate matter from re-entrained dust on roadways. The way the calculations work, the amount of particulate matter (dust/silt loading) continues to increase with each passing vehicle. There is no upper limit on the amount of dust that can be created, even when there is only a finite amount of dust available on the roadway. Neither the national mobile source emission factor model, (MOBILE6.2) nor the California model (EMFAC) account for re-entrained dust, so the options available to analysts are to either conduct expensive field monitoring to develop site specific emissions or use AP-42 emission factor calculations. The objective of this study is to identify and develop guidelines for the use of more accurate calculation methods (or a more accurate modification of the existing AP-42 method) to calculate PM<sub>2.5 </sub>and PM<sub>10</sub> emission factors for re-entrained road dust for both paved and unpaved roads that will be acceptable to the USEPA and states.</font></div>


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  • Status: Completed
  • Funding: $75000.00
  • Contract Numbers:

    Project 25-25, Task

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Hedges, Christopher

  • Performing Organizations:

    Parsons, Brinckerhoff, Quade and Douglas, Incorporated

    400 S.W. Sixth Avenue, Suite 802
    Portland, OR  United States  97204-
  • Start Date: 20070918
  • Expected Completion Date: 0
  • Actual Completion Date: 20081101
  • Source Data: RiP Project 16426

Subject/Index Terms

Filing Info

  • Accession Number: 01464616
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 25-25, Task
  • Files: TRB, RiP, USDOT
  • Created Date: Jan 3 2013 2:46PM