The purpose of the interchange lane drop study was to develop a uniform method of signing to warn drivers of interchange lane drops and to guide them to their proper route or destination. The report presents recommendations for interchange lane drop signing and the analytical and empirical basis for the recommendations. It summarizes the analytical work leading to the development of recommended treatments. Included are a literature review, a state-of-the-art survey of existing treatments and a human factors analysis of the problem. Recommendations are made for exits and splits. For exits, the black-on-yellow EXIT ONLY panel, consistently applied is recommended when route continuity is maintained, and in conjunction with diagrammatics at left exits. A diagrammatic treatment without the EXIT ONLY panel is recommended at exits where route discontinuity occurs. At splits, conventional signing is recommended for certain splits without an optional lane and diagrammatics at optional lane splits and splits without an optional lane where the off-route movement is to the left of the through-route movement.

  • Supplemental Notes:
    • A paper on this project appeared in TRB Transportation Research Record 600, HRIS 53 156288.
  • Corporate Authors:

    Federal Highway Administration

    Office of Safety and Traffic Operations, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Lunenfeld, H
    • Alexander, G J
  • Publication Date: 1976-6

Media Info

  • Pagination: 185 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00143029
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA/TO-76/01 Final Rpt.
  • Files: NTIS, TRIS, USDOT
  • Created Date: Oct 6 1976 12:00AM