At a press conference this afternoon, NTSB spokesman Robert Sumwalt said the engineer of the Amtrak train that derailed last night in Philadelphia applied the emergency brake “just moments” before the fatal crash. Sumwalt also said that an automated speed control system called positive train control was not installed on that stretch of track.

“We feel that had such a system been installed in this section of track, this accident would not have occurred,” he said, according to CNN.

The train, Sumwalt said, was traveling 106 mph—in a 50 mph zone—when it crashed during a left turn. The speed limit for the area just ahead of the curve was 80 mph, according to Sumwalt.

The NTSB hasn’t yet spoken with the train’s engineer in order to give him time to “convalesce.” Sumwalt said the group hopes to interview him tomorrow. Earlier today, the engineer refused to give a statement to police.

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