Speed Environment News Today : Breaking News, Live Updates & Top Stories | Vimarsana

The ntsb has a go-team on the ground. they just spoke in the last half hour. take a listen. >> we're going to look at all of the signals, tracks, mechanics. there are many factors and human factor. that's part of the interviewing. as well as looking at the operations bulletins and some of the records to find out what exactly was the speed environment. and the requirements for this area. >> reporter: there's been a lot of talk about that positive access control system that would have automatically stopped this train here. that was not implemented at the time. we're told that it was likely going...

Heard of any reported signals that could have been a warning? >> that's one of the things we're going to be looking at. we're going to look at all of the signals as well as the track, as well as the mechanics. and human factors. that's part of interviewing the crew as well as looking at all the operations bulletins and some of the records to find out what exactly was the speed environment and the requirements for this area. >> well, i want to stay on that speed environment because that's definitely a human factor. with the train going triple the appropriate limit, would that be enough to knock...