On one side, Lower Manhattan “Then” superimposes three different historical maps that provide a snapshot of what the area looked like at three critical points: 1800, 1850, and 1900.

Where each wave will begin in lower Manhattan: Road Closures: Here is a list of roads that will be closed to traffic due to the bike tour, according to the city's Department of Transportation.

Map showing proposed development of Lower Manhattan Expressway, New York City, circa 1967–72. Paul Rudolph Archive/Library of Congress Bird’s-eye perspective section rendering of Lower ...