Samenvatting
This paper summarizes the proceedings of a special summer meeting arranged by two separate committees of the Transportation Research Board: the Roadside Safety Features Committee and the Traffic Safety in Maintenance and Construction Operations Committee. The joint meeting was held at the Northwestern University Traffic Institute in Evanston, Illinois, on July 17-18, 1989. Topics of discussion included: (1) requirements for work zone traffic control devices, (2) requirements for work zone barriers and crash cushions, (3) adjusting work zone barrier and crash cushion requirements by use of traffic control plans, and (4) warrants and safety requirements for truck-mounted attenuators.