Where does the subway run above ground?
The City of New York provides a layer for transportation structures but doesn’t differentiate between subway elevated lines, road bridges, footbridges, and tunnel bellmouths. I isolated the structures that roughly correspond with subway trackage. The major areas of elevated track are correct, but short segments might be missing, and some of the structures shown are road bridges.
I’m using subway route data from Steven Romalewski, who converted MTA GTFS data into shapefiles.
See nycsubway.org on Elevated Sections of the Subway.