Longitudinal channelizing devices along business entrances in work zones.
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Longitudinal channelizing devices along business entrances in work zones.

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  • Abstract:
    This report documents the efforts and results of research to evaluate the effectiveness of alternatives to the

    use of channelizing drums for driveway delineation in work zones. The Florida Department of

    Transportation (FDOT) had originally sought to investigate the use of blue-striped channelizing devices but

    ultimately decided to examine the effectiveness of low-profile longitudinal channelizing devices (LCDs).

    LCDs are already an accepted device in the Manual on Uniform Traffic Control Devices and so would not

    require changes to the manual in order to be used on projects. The LCDs were compared against standard

    drum delineation in both a closed-course study and a field study in Florida work zones. The researchers used

    erratic maneuvers, speed profiles, and driveway user surveys as measures of effectiveness. The results

    indicated that there were no significant differences in the erratic maneuvers and speeds of turning vehicles

    that were attributable to the treatments. However, the survey results showed that drivers prefer LCDs over

    drums for helping them identify driveway openings. Meanwhile, other studies outside of Florida have shown

    that using LCDs instead of channelizing drums at a driveway improves driver ability to locate that driveway.

    Considered in total, researchers recommend that FDOT consider modifying its driveway delineation standard

    to allow LCD use. The standards should include requirements that they be delineated and that they be

    properly ballasted.

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