On Metrolink the engineer calls out the signal, and the conductor repeats it via packset. I believe he also has to write it down. The conductor was in the last car and broke two legs.
The UP trains are supposed to call out indications also, for awareness of other trains and within the cab.
Amtrak also calls out the signals and the conductor repeats them. I hear the Coast Starlight every night crossing the Valley just hearing them calling out the signals on 29/29
Oh, and the UP train had a video camera in the cab...UP and BNSF has started installing cameras in everything, since they are first to be blamed for grade crossing accidents, etc