A series of problems, including falling debris and signal issues, wrought havoc on the Friday morning commute for tens of thousands of subway riders.
The MTA said "fallen debris" from the ceiling at the Hoyt Street station prompted major service changes on the red and green lines, with southbound 2 and 3 trains rerouted. Southbound 4 and 5 trains were running local.
Service was disrupted for more than an hour as crews worked to clear the debris; it was restored shortly before 11 a.m. with extensive delays.
Separately, signal problems at Lexington Avenue-59th Street prompted the MTA to suspend service on the N and W lines between Manhattan and Queens for about 45 minutes. Service resumed shortly before 10 a.m. with major delays on the F, N, Q, R and W lines.