These streets form a part of Manhattan's grid plan determined by the Commissioners' Plan of 1811. They run parallel to each other, roughly east-west, between First Avenue and the West Side Highway.
In general, even-numbered streets are one-way east and odd-numbered streets are one-way west. 23rd Street, 34th Street and 42nd Street, 57th Street and 59th Street carry two-way traffic.
Broadway runs diagonally, crossing 23rd Street at Fifth Avenue, 34th Street at Sixth Avenue, and 42nd Street about 3/4 of the way from Sixth Avenue to Seventh Avenue.
Streets change from west to east (for instance West 28th Street to East 28th Street) at Fifth Avenue.
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