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=== Underpass === {{main|Subway (crossing)}} [[File:VIEW THROUGH CATTLEPASS NEAR BRIDAL VEIL FALLS. - Historic Columbia River Highway, Troutdale, Multnomah County, OR HAER ORE,26-TROUT.V,1-31.tif|right|thumb|Underpass for cattle created in 1914 construction of what is now [[Historic Columbia River Highway]]]] An '''underpass''' is a road or railway or other passageway passing ''under'' another road or railway, under an [[overpass]]. This is not strictly a tunnel.
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