In the last few weeks, crews have installed flashing light signals on Mount Tom Road on both sides of this track. Additionally, a large cantilevered flashing light signal has been set up to warn vehicular traffic exiting the PCA site.
Presumably, these active signals were mandated after a car drove into a Pan Am freight train on this track on October 6, 2015. At the time of the accident, this crossing had been protected by a set of passive signals known as crossbucks.
Railroad-Highway Grade Crossing Handbook
Revised Second Edition
U.S. Department of Transportation | August 2007