The MTA has a word of caution to those traveling on the Upper East Side:
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From: Subway-Bus@alerts.mta.info
Date: Mon, May 12, 2014 at 9:56 PM
Subject: MANH, 6 Trains, Falling Concreten/b 6 trains are bypassing 96 St, due to falling concrete at 96 St. Allow additional travel time.
So good luck with that.