This weekend, from 11:30 p.m. Friday, April 12 to 5:00 a.m. Monday, April 15 there will be no service in either direction at the 4/5 platforms at Borough Hall, as 4 trains will be terminating and originating at Bowling Green in Manhattan, and 5 trains do not serve Brooklyn on weekends. Use 2 or 3 trains, which should be running normally, for travel to or from Manhattan or the interior of Brooklyn. From 9:45 p.m. Friday to 5:00 a.m. Monday there will be no Brooklyn bound service at York Street in DUMBO as F trains will be re-routed to the A/C line from 42nd Street to Jay Street-MetroTech. Those traveling from Manhattan to DUMBO can get off at High Street and walk down the hill, or get off at Jay Street and take a Manhattan bound F to York. To get to Brooklyn from the LES stations on the F, take a Manhattan bound F to West 4th nd change there for a Brooklyn bound A, C. or F.
The following work week, each night Monday, April 15 to Thursday, April 18 from 9:30 to 11:30 p.m. there will be no C train servic in either direction, but A trains should be running normally. Each night, Tuesday to Friday from 11:00 p,m. to 5:00 a.m. there will be extra Manhattan bound service at Court Street and at the R/N platforms at Jay Street, as Manhattan bound Q trains will be re-routed to the R line between De Kalb Avenue and Canal Street.
For planned service changes that may affect travel on other parts of the system, either during the weekend or the following week, and for unplanned disruptions, see MTA Info.