F Coney Island-bound trains run via the M from Roosevelt Av to 47-50 Sts
Late Nights, 11:45 PM to 5 AM, Mon to Fri, Feb 4 – 8
No Coney Island-bound F service at 21 St-Queensbridge, Roosevelt Island, Lexington Av/63 St and 57 St.
Also, according to the MTA:
F Jamaica-bound trains run via the M from 47-50 Sts to Roosevelt Av
Weekend, 9:45 PM Fri to 5 AM Mon, Feb 8 – 11
Trains run express from Queens Plaza to Roosevelt Av.
No Jamaica-bound service at 57 St, Lexington Av/63 St, Roosevelt Island and 21 St-Queensbridge.
and:
Long-term construction projects impact train service between Queens and Manhattan
Multiple projects require the rerouting of trains while work is done, which include:Switch replacement and the modernization of the signal system at Roosevelt Av, 71 Av and Union Tpke
Radio communication upgrade at Parsons Blvd
Replacement of tracks at 36 St and Lexington/53 St stations
Connection of the Second Avenue subway to the Lexington Av-63 St station