Research for the AASHTO Standing Committee on the Environment. Task 89. Establishing Representative Background Concentrations for Quantitative Hot-spot Analyses for Particulate Matter

Under Environmental Protection Agency (EPA) guidance certain transportation projects must be quantitatively evaluated to assess near-road particulate matter (PM) impacts. The PM hot-spot assessment involves estimating the incremental PM concentration originating from a proposed project, adding that increment to a representative background concentration, and determining whether the combination (increment plus background) meets conformity tests. The purpose of this project was to develop step-by-step methods to help transportation project analysts estimate representative background concentrations for use in PM hot-spot conformity analyses. In addition, the project addresses the influence of exceptional-type events on background concentration calculations.


  • English


  • Status: Completed
  • 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 & Transportation Officials

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

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Performing Organizations:

    Louis Berger Group, Incorporated

    412 Mount Kenble Avenue
    P.O. Box 1946
    Morristown, NJ  United States  07962
  • Principal Investigators:

    Eisinger, Douglas

  • Start Date: 20130807
  • Expected Completion Date: 0
  • Actual Completion Date: 20140829
  • Source Data: RiP Project 37771

Subject/Index Terms

Filing Info

  • Accession Number: 01543700
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 25-25, Task
  • Files: TRB, RiP
  • Created Date: Nov 20 2014 1:03AM