A Guide for Protective Screening of Overpass Structures
The Association, 1969 - Pedestrian facilities design - 16 pages
The problem of preventing objects from being dropped or thrown from overpass walks onto vehicles travelling below has increased with the increase of freeway development. reports of large objects falling through windshields and fatally injuring occupants have been received from many areas. Completely covered or only partially enclosed have been most effective. For vehicular and pedestrian overpasses, both chain-link fencing and sheet metal fencing have been effective, the latter having the advantage of screening the view. Locations where screens should be considered during overpass construction are those near schools and playgrounds and those in large urban areas where police surveillance is difficult. Naturally screens should be installed on existing structures where "overpass bombing" incidents have occurred.
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absolute acts addition adults areas bridges Carolina chain-link children from playing CIRCULAR Colorado covering criminal activity curved Daniel definitely degree of accuracy detailed plan determined device discourage dropped from overpass dropping objects Education effective eight-foot ENCLOSURE Figure erected establish example existing installation fatalities fence Figure 9 guide highway incidents of objects indicates individuals installation is shown installation of screens instance James John John E large objects location method need North number objects being dropped objects being thrown occur open outer overpass facilities overpass structure parapet partially enclosed PEDESTRIAN OVERPASS plastic playground police prevent problem of objects protective screen proved RECTANGULAR ENCLOSURE Region regulations reported result safety school screen or barrier Secretary serious consequences shown in Figure Shumate side screens Small objects surveillance throwing of objects traveler type design type is shown unlikely Various types vehicles VEHICULAR vertical walks walkway warrants