FILE- In this Dec. 1, 2013 file photo, emergency personnel respond to the scene of a Metro-North passenger train derailment in the Bronx borough of New York. Metro-North trains are equipped with an automatic breaking system that might have prevented the crash, but the system was in place to regulate the distance between trains, not to control speeds as trains approached curves, or passed over hills and bridges. Since the crash, the speed limit was lowered on the approach to the curve, plus an alarm will sound and an automatic braking system will engage is a train approaches the bend too fast.  (AP Photo/John Minchillo, File)

Photo by: John Minchillo

FILE- In this Dec. 1, 2013 file photo, emergency personnel respond to the scene of a Metro-North passenger train derailment in the Bronx borough of New York. Metro-North trains are equipped with an automatic breaking system that might have prevented the crash, but the system was in place to regulate the distance between trains, not to control speeds as trains approached curves, or passed over hills and bridges. Since the crash, the speed limit was lowered on the approach to the curve, plus an alarm will sound and an automatic braking system will engage is a train approaches the bend too fast. (AP Photo/John Minchillo, File)