The railroad is rolling out a $388 million double track project to add an 18-mile line of track to the busy Ronkonkoma branch.
Police said 66-year-old Patricia Ward was killed by her son, 35-year-old Derek Ward, who then killed himself by stepping into the path of an oncoming Long Island Rail Road train.
Police Tuesday evening were investigating two deaths in Farmingdale, in a probe that shut down the Ronkonkoma Branch of the Long Island Rail Road.
A Long Island man is dead after he lost control of his car and crashed into a Long Island Rail Road platform.
The extreme cold is apparently to blame for several incidents on the rails this past week.
Crews are quickly working to get rail networks back on track following the devastating toll Superstorm Sandy took on New York City Transit and parts of the Long Island Rail Road and Metro-North Railroad.
The MTA suspended service in both directions along the Ronkonkoma Branch of the Long Island Rail Road as crews worked throughout the night to clear the train in time for the morning rush.