This in from Notify NYC:
This weekend, the Brooklyn Bridge will be fully closed to Manhattan-bound traffic for 54 consecutive hours. The closure begins at 12:01 AM on Saturday, 1/12/13, through 6:00 AM Monday, 1/14/13. Brooklyn-bound traffic will be maintained, which will access the bridge from Pearl St or Centre St using a contra-flow configuration. There will be
additional access via the Park Row ramp from Frankfort St. This ramp will be available only from 6:00 AM Saturday, 1/12/13 until 1:00 AM Sunday, 1/13/13, and from 9:00 AM to 11:00 PM on Sunday, 1/13/13.