OPTIONS FOR NORTH CAROLINA COASTAL HIGHWAYS VULNERABLE TO LONG TERM EROSION. EXECUTIVE SUMMARY

In the United States there are many miles of highways adjacent to ocean shorelines. In North Carolina, for example, there are over 200 miles of coastal highways, many of which are on barrier islands. Due to a combination of ocean, storm, and engineering design factors, these roadways are being damaged. The long term expectation of continued highway damage requires comprehensive and continuing studies of highway vulnerability. Then the decisions to repair, protect, or relocate these highways may be accomplished in a responsible, cost-effective manner. This report focuses on North Carolina, however, its results have application to other states. It identifies North Carolina highway sections that are susceptible to ocean damage and ranks their relative vulnerability by expected year of damage. After identifying likely vulnerability resulting from long term erosion forces, feasible engineering solutions including shoreline hardening, beach nourishment, and highway relocation or abandonment are matched to appropriate highway sections. Approximate costs, construction year, and other factors are discussed for each critical highway section. An evaluation methodology for planning coastal highway repair and protection is developed and tested. This methodology includes the use of geographic information systems and other techniques for computer aided design. It has application to Great Lakes, Atlantic, Pacific, and Gulf Coast states with similar problems.

  • Corporate Authors:

    North Carolina State University, Raleigh

    Department of Civil Engineering
    Raleigh, NC  United States  27695-7908

    North Carolina Department of Transportation

    Division of Highways, P.O. Box 25201
    Raleigh, NC  United States  27611

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Stone, J R
    • Fisher, J S
    • Overton, M F
  • Publication Date: 1991-7

Media Info

  • Features: Figures; Tables;
  • Pagination: 43 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00622308
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/NC/91-004
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: May 31 1992 12:00AM