This project investigated the operations and safety characteristics of left exit lane drops. As generally recognized, constructing left exits is to be avoided; however, when present, suggestions on methods to improve safety and operations are valuable. One alternative for better communicating to motorists the presence of a left exit lane drop is with pavement markings. Lane drop pavement markings, pavement arrows, and raised pavement markings were evaluated at one site to determine their effectiveness during daytime and evening operations. Erratic maneuvers were reduced by 40 percent during daylight operations, and by 34 percent during evening operations. The predominant type of erratic maneuver within 300 ft (91.5 m) of the gore was the lane change through the gore area. The most common type of erratic maneuver upstream of the gore area was the two-lane lane change.


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    Title :

    Improved Communication of a Left Exit Lane Drop Using Pavement Markings


    Contributors:
    K. Fitzpatrick (author) / M. Lance (author) / T. Urbanik (author)

    Publication date :

    1994


    Size :

    68 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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