In the wake of the deadly derailment in the Bronx earlier this month, Metro-North is going under the federal microscope.
Starting Monday, the Federal Railroad Administration will perform a 60-day review of safety practices on Metro-North.
The effort will cover a broad range of practices, including oversight of engineers, fatigue management and medical requirements for crew members.
The railroad has already implemented a number of new safety measures since the December 1 derailment that killed four people and injured dozens more.
The National Transportation Safety Board found that train operator William Rockefeller was traveling nearly three times the speed limit going into a sharp turn.
His union says that he may have temporarily lost focus at the controls.