Improving Work-zone Delineation on Limited Access Highways
Improving Work-zone Delineation on Limited Access Highways

Author: Frank D. Shepard

Publisher:

Published: 1989

Total Pages: 34

ISBN-13:

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The purpose of this study was to investigate vehicle guidance through work zones by evaluating the effectiveness of two primary components of traffic control relative to delineation. First, a comparison of the steady-burn lights presently used on top of the temporary concrete barriers was made with experimental reflectorized panels. Second, the addition of closely spaced raised pavement markers as a supplement to the existing pavement markings was evaluated. The study was limited to work zones on interstates and four-lane highways. The results of this investigation have led to the recommendation that (1) steady-burn lights on temporary concrete barricades should be replaced with reflectorized panels fabricated with high intensity sheeting, and (2) closely spaced, raised pavement markers should be used as a supplement to existing pavement striping in areas where the roadway alignment changes.

Evaluation of Construction-zone Pavement Marking Materials
Evaluation of Construction-zone Pavement Marking Materials

Author: Kenneth R. Agent

Publisher:

Published: 1987

Total Pages: 30

ISBN-13:

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The objectives of this study were to evaluate available foil-back and removable tapes as well as construction-zone raised pavement markers and to recommend materials that should be included on approved lists for use by the Kentucky Department of Highways. Tapes and markers were placed on transverse test sections and the reflectivity, durability, and appearance were observed. Tapes to be included on the approved lists for foil-back and removable tapes were recommended. Tapes manufactured by 3M, Flex-O-Lite, Cataphote, and Swarolite were included on the list of acceptable foil-back tapes. Recommended removable tapes were the 3M and Cataphote removable tapes. Stimsonite 66 and Flex-O-Lite construction-zone markers were included on the approved list for construction-zone raised pavement markers. More specific guidelines were developed to use in future evaluations of construction-zone preformed tape and markers.