If you’ve ever been a regular user of mass transit, you quickly come to learn exactly where to stand when waiting for a train, subway, trolley, tram, monorail, etc., so that you can get off in just the right spot to swiftly exit the station, or make your transfer. Nowhere is this more true in the U.S. than New York City, where some commuters guard the secrets of the subway like treasured family heirlooms. That’s why a new effort to share this sort of information with everyone is both helpful and problematic. [More]