Amtrak Crash: Demonstrating Positive Train Control

Investigators say the area where Amtrak Train 188 crashed did not have a speed control system, also known as Positive Train Control, in place.
2:20 | 05/15/15

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Transcript for Amtrak Crash: Demonstrating Positive Train Control
Once the PTC. Actually takes control these Alec and auto pilot on the commercial airliner correct what it does is it him. Televise all the controls the computer takes control now what's interesting is the dispatcher. Get a banner on his computer screen that says this train has had an enforcement breaking application so with the train goes into this penalty application that PTC actually takes control. That's automatically. Correct this half its value better overseas. So as you see it's telling you. The trend is an over speed you're seeing the race for coming on. That is touching it started to break correct your powers back at. At zero so the train itself is protecting youth because. It sees it in less than a mile or less than two miles you have a difference. Stock market. It's drinking that train engineer duties and I think oh right there's nothing and this is just like a real train this is what it feels like this is what it would look let's help accelerate the and again tastes come to it did stop from 6870 miles an hour would be over a mile of track correct. It's your warning just shows you. But if you don't do anything and point two seconds to train stop itself tells news Reid is restricted to forty miles per hour. Some one point seven miles is a like been trained in Philadelphia this is going twice as me. And that's why would some things. Green vote and they're there could be many reasons. Could be a medical crisis if engineer say had a for whatever reason. A health scare. And was incapacitated this is where the system comes in and would take control which are easy Rick downside to taking humans. This equation. Yeah you if you always need a set of lies you've got you've got 2000 tons. Of equipment you've got 3600 horsepower and you've got. Thousands of people on the train in the computers are great. All right but it doesn't do everything and it's tremendous response correct.

This transcript has been automatically generated and may not be 100% accurate.

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