Exclusive: Derailed Amtrak train was not fitted with latest U.S. safety controls

By Patrick Rucker and Jarrett Renshaw WASHINGTON/PHILADELPHIA (Reuters) - The commuter rail route where an Amtrak train left the track on Tuesday was not governed by an advanced safety technology meant to prevent high-speed derailments, officials familiar with the investigation said on Wednesday. Positive train control (PTC) automatically slows or even halts trains that are moving too fast or heading into a danger zone. The cause of Tuesday's crash, in which seven people were killed, has on