The accident occurred around 10 p.m. Saturday, just west of the Short Hills station. It's not clear why the woman was on the tracks, and authorities say she has not yet been identified.
Officials say the engineer sounded the Dover-bound train's horn and activated the emergency brakes, but could not stop the train in time. None of the 325 passengers and crew aboard the train were injured in the accident.
The cause of the accident remains under investigation.
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