Helena Williams vowed on Monday to develop a plan “that better protects” customers.
She said the railroad has launched a “full scale review of the circumstances” that led to the incident.
The Ronkonkoma-bound train left Penn Station at 2:53 a.m. Sunday. It reached its final destination about five hours later.
Williams said although train crews worked through “extremely difficult blizzard conditions,” more could have been done.
The train was first delayed by snow and ice, then stopped by a passenger car that became stuck while crossing the tracks. The train was stopped again when the weather caused the locomotive pulling the train to break down.