It's interesting reading the back and forth of people commenting on the SkyTrain noise.
My sister has lived in New Westminster for over 20 years and the train is a few blocks away.
It was always audible with the windows open, but the sound disappeared when they were closed. This summer, I have visited her twice and the sound is like nails on a chalkboard.
With closed windows and no hearing aids, I was awakened throughout the night.
By chance, she is moving soon and that is the end of her problem. But I am truly sorry for everyone left to contend with that ungodly sound.
It must be a maintenance issue, or sound demons have descended on the whole transit system. The train may have been there first but the noise is a recent addition.