A n y o n e ?
Okay, I guess some of us had a cab ride in a metro train already, at least, I did. And I remember that you don't really hear the announcements. First, you have all the other drivers talking over the train radio system when they have problems. Than you have sound from the train itself, like the eeech-ssschreeeeeach in curves and the alarm system and in the end you had passengers talking, so when you're lucky, you could sometimes hear the announcement chime, but that's it.
So I guess Afroeptool isn't that important, but if someone wants to make a list and / or announcements, I would support him.
) I had to put it here: 
But there's one thing you should'nt forget, You should make sure that the player can stop on station on HSM track without overrunning the platform, because as far as I know, stopping HSM train from it's max speed (250 km/h) with braking on -1.00 is very hard and braking distance is very long. Yeah, you can tell me "use -2.00 instead of -1.00!", but guess what? I hate flat wheels noise, it's very annoying.