Detailed text transcripts for TV channel - CNN - 20171219:22:53:00
Run on a new passenger route, the train sped 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. ptc forces speeding trains to automatically slow down. >> we're going to find out exactly what ptc or positive train control would have prevented this accident. it's a great disappointment that positive train control has not been implemented in ev...