Detailed text transcripts for TV channel - CNN - 20171219:23:55:00
At 80 miles per hour. much faster than the posted 30-mile-per-hour speed limit for the curved section of track. investigators already recovered the train's rear black box. and they also know this. life saving technology called positive train control, was not activated on this brand-new passenger rail line. p.t.c. forces speeding trains to automatically slow down. >> we're going to find out exactly whether ptc or positive train control would have prevented this accident. it's a great disappointment that positive train control has not been implemented in every single railroad across the country ...