Speed Environment News Today

The ntsb has a go-team on the ground. they just spoke in the last half hour. take a listen. >> were going to look at all of the signals, tracks, mechanics. there are many factors and human factor. thats 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: theres been a lot of talk about that positive access control system that would have automatically s...

Heard of any reported signals that could have been a warning? >> thats one of the things were going to be looking at. were going to look at all of the signals as well as the track, as well as the mechanics. and human factors. thats 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 thats definitely a...