Subway (underpass)
A subway, also known as an underpass, is a grade-separated pedestrian crossing running underneath a road or railway in order to entirely separate pedestrians and cyclists from motor or train traffic. Terminology In the United States, as used by the California Department of Transportation and in parts of Pennsylvania such as Harrisburg, Duncannon and Wyoming County, subway refers to a depressed road undercrossing. Where they are built elsewhere in the country, the term 'pedestrian underpass' is more likely to be used, because "subway" in North America refers to rapid transit systems such as the New York City Subway or the Toronto subway. This usage also occurs in Scotland, where the underground railway in Glasgow is referred to as the Glasgow Subway. Effects Pedestrian underpasses allow for the uninterrupted flow of both pedestrians and vehicle traffic. However, they are normally considered a last resort by modern urban planners as they can be expensive and cause graffi ...
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