Video from NewsCopter 7 showed crews working on the problem in Short Hills.
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The tree apparently came down on some overhead wires following heavy storms that moved through the area Thursday night.
NJ Transit is single tracking through the area.
30-minute delays are now being reported Friday morning on the Morris and Essex Line and the Gladstone Line.
That's down from 60-minute delays reported earlier.
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NJ Transit rail tickets and passes are being cross-honored by NJ Transit buses and private carriers.
Commuters are advised to seek alternate routes and allow extra time heading out.
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