The study investigated the effectiveness of various barrier-mounted reflectors. Barrier delineators come in different shapes and sizes, and their materials and installation labor costs also differ. They can be mounted on the barrier top, the barrier face or even on the pavement. A delineator's level of effectiveness depends on the type of delineator as well as its placement. The study evaluated the effectiveness of seven concrete barriers delineators: Astro-optics on the barrier top, Reflexite on the barrier top, reflective cylinders on the barrier top, hazard panels, raised pavement markers on the barrier face, Astro-optics on the barrier face, and Davidson markers on the edge line. The study concluded that drivers need the guidance of delineators most when they are confronted with opposing traffic headlight glare. The study recommended that the Manual on Uniform Traffic Control Devices make note of the effect of opposing traffic headlight glare on delineators' effectiveness, that delineators be placed on the top of concrete barriers, that prism-lensed devices are the most effective, and that delineators should be cleaned regularly.
Evaluation of Delineation Systems for Temporary Traffic Barriers in Work Zones. Executive Summary
1987
24 pages
Report
No indication
English
Delineation of Temporary Barriers in Work Zones
NTIS | 1985
|Placement Guidance for Temporary Concrete Barriers in Construction Work Zones
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|Temporary Barriers Used in Construction Zones
NTIS | 1980
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