Work Zone Traffic Control Delineation for Channelization
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields



Publication Date Range:


Document Data


Document Type:






Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page


Work Zone Traffic Control Delineation for Channelization

Filetype[PDF-4.56 MB]

  • English

  • Details:

    • Corporate Creators:
    • Contributors:
    • Publication/ Report Number:
    • Resource Type:
    • Geographical Coverage:
    • Contracting Officer:
    • Abstract:
      This report describes a study of the delineation requirements for work zone traffic control. The research included a comprehensive review of past studies and current practices, and an examination of current standards. It was concluded that, in spite of the increasing number of different types of channelizing devices, there appears to be no scientific basis for the spacing criteria for the use of devices for channelization purposes in the taper or tangent sections of a work zone. A laboratory-based testing procedure was used to determine the most appropriate spacing configuration. An interactive video system was used to test subject recognition distances of eight different device types spaced at the standard distance, 1.5 times and 2.0 times the standard distance. Over 240 subjects were tested. The results indicated variability between the performance of most channelizing devices across the spacings tested. Field testing was undertaken at six actual work zones. Right and left closures were used to test the various device-spacing configurations under both day and night conditions. Manual and automated methods were used to gather the field data for traffic approaching a work zone. The study area included four points equally spaced over the 2000 ft (600 m) before the work zone and the activity at the start of the taper for the lane closure. The tests were undertaken under the hypothesis that the most effective treatment would minimize the percentage of traffic in the closed lane at the start of taper. Field data were analyzed for 2100 5-minute observation periods. Statistical analysis of the data determined neither type of device (round barrels, oblong barrels, Type II barricades, and cones with reflectorized collars) or device spacing (55, 80, and 110 ft) [16.5, 24.7, 33.0m] had a significant effect on driver lane changing behavior. Recommendations for locating work zones to maximize the sight line on the approach to the taper are presented.
    • Format:
    • Main Document Checksum:
    • File Type:

    Supporting Files

    More +

    You May Also Like

    Checkout today's featured content at

    Version 3.26