Detailed text transcripts for TV channel - CNN - 20171219:05:48:00
Collision or an overspeed derailment. that technology is a lifesaver and should be on all of those routes now. >> it wasn't used here. we don't know if it was there and not implemented but it wasn't used by this train on this day. now, i do understand the track has undergone millions of dollars of improvements but it was still a track previously used for occasional freight and military transport. could that be problematic at all? >> so it's still too early to tell if positive train control could have prevented this crash because you have to know what the cause of the derailment was. but certai...