Turnstyle is a privately funded retail development that transforms a heavily traversed public passageway within the Metropolitan Transit Authority subway system into a vibrant public space for shopping, eating and gathering. Extending from West 57th to 58th Street below Eighth Avenue and above the train tunnel, the 365 foot long mezzanine level concourse connects the busy Columbus Circle station to multiple sidewalk entries and office building lobbies. The primary goal of the project is to bring a familiar street-level urbanism into the underground space. It is a different kind of public space. Rather than a destination where people go and stay a while, like the sidewalks it is a place that people inhabit briefly but frequently - maybe for only a few minutes at a time but every day. As part of a routine, it builds in one's memory to become an important urban place. Turnstyle opened to the public in April 2016. (Architecture Outfit)