1 trains resumed operation, with delays, after being suspended between South Ferry and Times Square.
NJ Transit commuters faced delays of up to 30 minutes Wednesday morning.
Crews were working to repair the rail at 59th Street, an MTA spokesman said.
An Amtrak power outage stalled their own trains and New Jersey Transit lines, officials said.
A broken rail caused major delays Thursday at about 5 p.m.
A freight train derailed in Jamaica Wednesday afternoon.
The F had more than 300 delay alerts in 2013, more than any other line, a transit advocacy group said.
The LIRR and New Jersey Transit both reported disruptions after a wire fell in Penn Station.
Normal service was restored to subway lines that experienced delays Monday morning.
Hannah Harris, 20, initially told police she had been carjacked, sources said.
Rail problems disrupted many New Yorkers' Thursday commute.
A man suffered a cardiac arrest after he was a hit by an M train, officials said.
A person died at the 6 train's Zerega Avenue stop, the FDNY said.
A person was taken to Bellevue Hospital after being struck by a B train Thursday, officials said.
The MTA reported delays on a host of trains during Tuesday's commute.
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