Hey Tom, I see your in from work! First off I like talking about my job, so ya'll can shoot any question about railroads at me and I will do my best to explain it. Second, You will most likely hear about any train accident that has deaths and large property damage...The problem with it is the reporters really don't understand what their talking about. Nothing new there!!! So with that said I will give you a simple answer and if it isn't enough, I'll come back with the hard answer. Deal?
So to answer your question it is yes and no... Sorry I couldn't pass that one up! There is a really big difference between your typical Amtrak/Subway passenger style trains that rarely have more than a dozen cars as to a real thru-frieght train with anywhere from 30 to 150 cars of heavy frieght. To give you an idea of the difference, one of the heaviest trains I run is a 136 car coal train that weighes in around 20,000 gross tons and runs 2 motors on the front and 1 motor on the rear to push and uses 13,200 hp. An Amtrak may have 1 3000 hp motor and 7 cars and weigh in at 800 gross tons. Now it takes alot of effort to get that coal train up and moving. And once you do it's like having a Tiger by the tail. About the only time I can walk away is if I am going up a grade and the whole train is stretched out. If I am lucky the grade will be several miles long giving me time to go to the restroom or grab something out to snack on. For the most part I am munipulating the amount of power or bracking effort between the front and rear engines to keep the train from 1. speeding and 2. breaking apart...The knucles that couple each car togather can only handle about 300,000 lbs. of resistance. One of my engines weigh in over 400k and a loaded coal car weighs in around 220k each. Believe me, trying to stop one of these monsters will give you a whole new understanding of the term (A**hole pucker)!!! So There isn't any kind of system to date that can safely control one of these trains.
Now on the other hand, there are systems in most places for Subway systems that do control train movement. There are alot like an airplane auto pilot system known as (positive train control). The accident in New York has that system in place, but I am unsure if it was being used at the time of the accident... The accident in Cal. did not have that system even though FRA had recommended it years before during the last big accident that company had. Now the issue that comes up is that the subway system in the cal. accident is a contractor that uses non-union employees. Pretty much the (rent a cops) of transportation. Most of the people working there couldn't get on with a real railroad or were terminated from a railroad. This guy was flat out screwing up. Our signals are pretty much the same as automotive traffic signals. Green-go. Yellow- Caution(Be prepared to stop before next signal) and Red-stop. He got by the yellow that told him to be slow down and be ready to stop. Than ran passed the Red where he should have stop at...Yes he was texting on his phone. Most companies have a rule of no electronic devices while moving. Now the FRA has a federal law on it. $10k fine to anyone caught doing it. I hope this helps a little and if not just ask!
Carlton