If you are referring to my comments about enhanced train control, we have to keep in mind that passenger and freight trains often use the same railways. It is important for train crews to be able to recognize the signals and react appropriately when they are activated.
Sometimes, for one reason or another, a train crew member misses a signal because his head is down or he is talking with someone. When it happens, there is a risk of collision between two freight trains or a freight train and a passenger train, because they often use the same railways.
We believe this is why we have to implement additional safeguards that go beyond administrative measures like regulations.