A New Jersey mystery........

At the new station platform in Woodbridge N.J. (Amtrak/NJT Metropark station), They've added an "Emergency Refuge Area" at the east end of the platform. It's basically a fenced-in concrete pad that is down a set of stairs from the platform. It is the only one of its kind in the system. Anybody want to venture a guess as to what it is that the Passengers are "refuging" from ? And what does one do once you've been herded into the holding area ?
Inquiring minds want to know !
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