This 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. … [Read more...] about Evaluation of Delineation Systems for Temporary Traffic Barriers in Work Zones
Delineators
Use of “Saddle drums”/“Saddlemarker”
Washington state DOT used saddle drums in a test area in the Northwest Region. The feelings were that they provided good barrier delineation (large target value) but were somewhat expensive for the … [Read more...] about Use of “Saddle drums”/“Saddlemarker”
Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices
The Nebraska Department of Roads mounts a 12" x 24" vertical panel on top of the concrete barrier. The concrete barrier has two vertical square holes on the top of the barrier for placing a post. … [Read more...] about Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices
Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices
Montana uses a top-mounted delineator that is 108mm wide by 89mm tall, using the recommended manufacturer specifications for an adhesive to fasten these to the top of the rail every 9.15 meters. … [Read more...] about Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices
Use of “Saddle drums”/“Saddlemarker”
Illinois DOT used "Saddlemarker" devices as a part of a major freeway reconstruction project on I-270 northeast of the St. Louis metropolitan area. On this project, the devices were placed at 250' … [Read more...] about Use of “Saddle drums”/“Saddlemarker”
Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices
Washington state has no requirement to put reflectors on permanent barrier. The state does, however, require them on any temp barrier 6" down on the face. A variety of manufactureres are approved. … [Read more...] about Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices