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>


  • English


  • Status: Completed
  • Contract Numbers:

    Project 25-25, Task

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    American Association of State Highway & Transportation Officials

    444 North Capitol Street, NW, Suite 225
    Washington, DC    20001

    National Cooperative Highway Research Program

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

    Hedges, Christopher

  • Performing Organizations:

    Parsons, Brinckerhoff, Quade and Douglas, Incorporated

    400 S.W. Sixth Avenue, Suite 802
    Portland, OR  USA  97204-
  • Start Date: 20070918
  • 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