/*Amtrak*/ said a machine that does track maintenance derailed in the northbound /*Hudson River*/ tunnel around 4.25 a.m. That left only one tunnel for Amtrak and /*NJ Transit*/ trains to use between /*Manhattan*/ and /*Trenton*/.
Amtrak spokesman Cliff Cole says the equipment was removed and the tunnel reopened by 8:45 a.m.
Amtrak trains were running up to 30 minutes behind schedule until the tunnel was cleared.
NJ Transit's /*Northeast Corridor*/ and /*North Jersey Coast Line*/ trains were delayed up to 60 minutes in and out of New York's Penn Station.
/*Midtown Direct*/ trains operated to and from /*Hoboken*/ until the derailed equipment was moved.
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