The motor sounds. I thought all Alstom trains is SG always have
the screech sound when it is reaching the station? Something like
when the train reaches a part of the PSDs then there will be a
screech then after that when it is ready to stop at the correct
position it will have a screech too? Something like the C830.
If I'm not wrong, there's some screeching sounds coming from
some C151s.