From 9:45 PM Friday, August 17 to 5:00 AM Monday, August 20 Brooklyn bound F trains are being diverted to the E line between Roosevelt Avenue in Queens and Canal Street in Manhattan, and to the A/C line between between Canal Street and Jay Street-MetroTech, so there will be no service from Manhattan to York Street in DUMBO, nor from the LES stops on the F. To get from the LES stops to Brooklyn take a Manhattan bound F to West 4th and change there for a Brooklyn bound A, C, or F. For those traveling to or from Williamsburg or Greenpoint, there will be no G train service in either direction from 9:30 PM Friday to 5:00 AM Monday. On a positive note, From 11:00 PM Friday to 5:00 AM Monday there will be extra service to Manhattan from Court Street and from the R platform at Jay Street, as Manhattan bound Q and Manhattan and Queens bound N trains will be diverted to the R line.
The following work week – Monday, August 20 to Friday, August 24 – each night from 10:00 PM to 5:00 AM there will be no 3 trains running, but 2 trains should be running normally. 4 trains will provide alternative service to 3 train stops from Atlantic Avenue to New Lots Avenue. On these same nights, from 11:45 PM to 5:00 AM, there will be extra Manhattan bound service at Court and Jay streets, as Q trains will be diverted to the R line between DeKalb 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.