>An inward facing camera may well have prevented this accident, if there was inappropriate activity, by the engineer, that contributed to this accident. If not, then no, it would not have prevented the accident. But we'd at least have a record of what he may have done wrong. Since we didn't have it, we will never fully know, what he may have been doing.

>And yes, an inward facing camera would almost certainly have helped to prevent what happened at Chatsworth, as Sanchez would have been forced to text in front of a live camera.

Yaaa Riiiiight. The basic premise of your assertion is flawed because in order to "prevent" somebody has to be watching the other end of the video feed from camera whenever the train is moving. Who is going to do that?? You might as well put another human being in the cab. It's like Oliver Lacon asks George Smiley in Tinker Taylor Solder Spy, "who spies on the spies?"