This just in from the folks at the Brooklyn Bridge Rehabilitation Project (“contraflow” means the re-routing of eastbound, or Brooklyn-bound, traffic onto the north–normally Manhattan-bound–side of the Bridge) :
Friday, September 17th [and early morning Saturday, September 18] will be the last eastbound contraflow operation for approximately three weeks. Ongoing work will occur on two of the three lanes of the south roadway, but one lane will remain open for Brooklyn-bound traffic. Manhattan-bound traffic will be on the north roadway, as it was pre-construction, and will not be diverted to the Manhattan Bridge.
The eastbound contraflow is happening tonight [Thursday, September 16 and Friday morning, September 17] (11:00 pm to 6:00 am) and tomorrow night (12:01 am Sat until 7:00 am Sat), and then will stop completely on weekends and weeknights for approximately three weeks. There will still be some lane closures on the bridge, but the eastbound contraflow will not occur.
Check BHB for further updates.