155th Street was the northernmost crosstown street of Manhattan’s 1811 grid plan.
155th Street is the northernmost of the 155 crosstown streets mapped out in the Commissioners’ Plan of 1811. Here it has two levels, linked only by a steep stairway: an upper viaduct, built in 1893 and now a City Landmark, leads to the Macombs Dam Bridge, while the station lies under the lower level, near Coogan’s Bluff, where the ground drops steeply.