An avalanche snow bridge or simply snow bridge is a type of rigid snow-supporting structure for avalanche control (avalanche defense). Avalanche bridges can be made of steel, prestressed concrete frames, or timber.[1] [2]
Snow bridges may superficially look similar to snow fences, but they act differently. Snow fences are built vertically and accumulate snow on their downwind side, while snow bridges are slanted or horizontal and hold snow on their top side.
Snow bridges are fastened to the slope on the upslope side by tension anchors and on the downslope by compression anchors. [3]
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Railway trains occasionally get blown off the tracks by high winds.
The Lanxin High-Speed Railway has particularly strong winds which blow on most days of the year; a 67-kilometre long wind-protection "gallery" has been proposed to be built in this region.