This weekend–from 11:45 p.m. Friday, December 5 to 5:00 a.m. Monday, December 8–there will be no service in either direction on the R and (late night) N line at Court Street or Jay Street/Metro Tech. R and N trains will be routed over the Q line between DeKalb Avenue in Brooklyn and Canal Street in Manhattan. This service interruption will continue through the following two weekends.
The following week, there will be no service on the 4/5 line at Borough Hall in either direction each night between the hours of 11:45 pm. and 5:00 a.m. Tuesday, December 9 to Friday, December 12. During the same late night hours Monday to Friday 3 trains will not be operating, but 2 trains will.