Unsurfaced or lightly surfaced low-volume roads constitute two thirds of the road network system in the U.S. While unpaved road design and maintenance is directed at delaying erosion, these efforts can also lead to degradation in riding surface, road drainage, and the local environment. This article gives a detailed overview on erosion, the impacts it has on unpaved roads, ways to deal with its effects, as well as prevention techniques. The article details information on water-related ills that face unpaved roads and offers advice concerning rutting, washboarding, potholing, soft spots, depressions in unpaved roads, sedimentation, and when to pave. Mitigation efforts involve examining the usage of road crowns, shoulder and ditch drainage, and quality surface. Examples are given of how some jurisdictions are combating erosion. The article concludes with a glossary of gravel road terms, as well as providing information on a variety of manuals and guidebooks on unpaved road planning, construction, and maintenance that are available on the Internet.

  • Availability:
  • Supplemental Notes:
    • Page range: pp 32-36, 38, 40, 42, 44-46
  • Corporate Authors:

    James Informational Media, Incorporated

    2720 South River Road, Suite 126
    Des Plaines, IL  United States  60018-
  • Authors:
    • Kuennen, T
  • Publication Date: 2005-2


  • English

Media Info

  • Features: Photos;
  • Pagination: 12 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00988229
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS, ATRI
  • Created Date: Apr 1 2005 12:00AM