For more than half a century, it has stood out as a singularly vexing flaw of the subway system, a glaring inequity that has frustrated generations of riders and has even puzzled transit officials, who have wondered how the situation ever came to be.

But beginning on Tuesday, once the first travelers make their way between a B train and an uptown No. 6 at Bleecker Street, a daily frustration will have given way to a whimsical remembrance: Here stood New York City’s fussiest subway transfer point, the one that went one way but not the other.

via Vexing Flaw in the Subway Is Finally Corrected – NYTimes.com.