This paper presents further comments on state-of-the-practice pavement drainage systems in North Carolina. Constructing a "V" or flat-bottom ditch with an independent grade helps drain water off a roadway section on a very flat area where the percent grade is almost zero and improves the overall drainage. Rigid pavement joints are normally sealed with hot-poured rubberized asphalt or preformed neoprene. With regard to underdrains and shoulder drains, North Carolina allows the contractor to select the kind of pipe to be used: corrugated steel, bituminous fiber, or concrete pipe. Concrete sand is used as subdrain fine aggregate material. Outlets are handled in one of three ways: the pipe is tied into some existing drainage structure; the pipe is extended through the slope and left sticking out, if it is a four-to-one slope or steeper on a fill; or miniature headwall is used in a shoulder section or a cut section, where the slope is four-to-one or flatter.

  • Supplemental Notes:
    • This paper was presented at a workshop on water in pavements conducted in 1973 by the U.S. Federal Highway Administration in Memphis, Tennessee.
  • Corporate Authors:

    Federal Highway Administration

    Office of Research, Development, Engineering and Highway Operations, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Pace, L F
  • Conference:
  • Publication Date: 1973


  • English

Media Info

  • Pagination: p. 112-115

Subject/Index Terms

Filing Info

  • Accession Number: 00790775
  • Record Type: Publication
  • Files: TRIS, USDOT
  • Created Date: Apr 30 2000 12:00AM