A survey of traffic engineers has been conducted and observations made on several lane drop sites throughout the country to define the extent and characteristics of freeway lane drop operational problems. There is very little standardization of lane drop geometric design or traffic control device treatment. Also, a high incidence of last-second lane changes and erratic maneuvers have been observed at may lane drop locations. Lane drop situations have been classified into five functional categories, and a set of design principles has been developed. Examples of the application of the design principles are discussed. /Author/

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  • Supplemental Notes:
    • Research sponosred by the American Association of State Highway and Transportation Officials in cooperation with the Federal Highway Administration. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Corporate Authors:

    Transportation Research Board

    500 Fifth Street, NW
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  • Authors:
    • Goodwin, D N
  • Publication Date: 1976

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 72 p.
  • Serial:
    • NCHRP Report
    • Issue Number: 175
    • Publisher: Transportation Research Board
    • ISSN: 0077-5614

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Filing Info

  • Accession Number: 00157899
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Sep 20 1977 12:00AM