No Roosevelt Island F Train Service To Manhattan This Presidents Day Weekend For Signal Maintenance Work Says MTA - How Did The Trains Get So Bad Asks NY Times

According to the MTA:

TRACK MAINTENANCE F Coney Island-bound trains run via the E from Roosevelt Av to Canal St, and via the A to Jay St-MetroTech Weekend & Holiday, 9:45 PM Fri to 5 AM Tue, Feb 16 - 20

... No Coney Island-bound F service at 21 St-Queensbridge, Roosevelt Island, Lexington Av/63 St, 57, 47-50 Sts, 42 St-Bryant Pk, 34 St-Herald Sq, 23, 14, B'way-Lafayette Sts, 2 Av, Delancey St, East Broadway and York St.

The Roosevelt Island Operating Corp (RIOC) adds:

The MTA has issued a weekend service advisory for the F train, which may affect travel plans. The Tram and red bus will run on a weekday schedule from Friday, February 16 until Tuesday, February 20, to accommodate any increase in traffic. Please plan your travel accordingly and visit mta.info/weekender or call 511 for more information.
For electronic updates on F Train service, sign up for MTA Alerts at mymtaalerts.com.

The NY Times asks how did the NY trains get so bad? - Nobody talks abut the subway signals NY Times report.