Stormwater Characterization from Roadways with Open Graded Friction Course Surfaces

Land-intensive best management practices (BMPs), such as bioretention basins and dry detention basins, have been installed by the North Carolina Department of Transportation (NCDOT) in high-value water supply and nutrient sensitive watersheds as part of the agency's statewide National Pollutant Discharge Elimination System (NPDES) permit. These BMPs often require additional and costly right-of-ways (ROW) and would most likely saddle NCDOT with long-term maintenance costs. Recently, NCDOT proposed that asphalt porous friction course (asphalt-PFC) can be a viable BMP option, which could provide multiple cost savings in design, installation, and maintenance. Asphalt-PFC can be easily integrated within the linear environment of the roadway system and acts to prevent pollutants from being generated in storm water. Additionally, asphalt-PFC would also improve motorist safety during storm events. A research team from the University of North Carolina at Charlotte (UNC Charlotte) proposes to initiate a 2.5-year study in order to assist NCDOT to evaluate such a design-related BMP that could be shown to be effective at reducing pollutant loads from roadway runoff. Goals of this proposed project are as follows: (1)To document the types and locations of existing asphalt-PFC in North Carolina and perform literature review of the effectiveness of asphalt-PFC as a viable BMP; (2) To perform a life expectancy analysis and cost comparisons of asphalt-PFC with conventional or concrete highways. Other types of asphalt-rubber and polymer-asphalt open graded fraction course surfaces (Anderson, 1987) may exist in the state and, if so, we will include these types of roadways for evaluation; (3) To conduct a field monitoring study to quantify the pollutant loads (TSS, TN, TP, NO3-N, NH4-N, PO4-P, DOC) from NC asphalt-PFC roadways in comparison to conventional roadway surfaces, and; (4) To assess the potential of integrating asphalt-PFC with roadway ROW vegetation coverage as a sequential treatment train for roadway runoff control.


  • English


  • Status: Completed
  • Funding: $201048.00
  • Contract Numbers:


  • Sponsor Organizations:

    North Carolina Department of Transportation

    Research and Development
    1549 Mail Service Center
    Raleigh, NC  United States  27699-1549
  • Project Managers:

    Kirby, John

  • Performing Organizations:

    University of North Carolina, Charlotte

    Department of Civil and Environmental Engineering
    9201 University City Boulevard
    Charlotte, NC  United States  28223-0001
  • Principal Investigators:

    Wu, Jy

  • Start Date: 20100816
  • Expected Completion Date: 20130215
  • Actual Completion Date: 20130215
  • Source Data: RiP Project 28939

Subject/Index Terms

Filing Info

  • Accession Number: 01463333
  • Record Type: Research project
  • Source Agency: North Carolina Department of Transportation
  • Contract Numbers: 2011-16
  • Files: RIP, STATEDOT
  • Created Date: Jan 3 2013 2:21PM