Why do train wheels screech?
I have just moved near to Victoria Station in London and have no real problem with the noise from the trains, but I am curious why some train wheels screech and some don't?
The screeching is caused by the lip on the inside of the train wheel rubbing on the inside of the rails. It's most common on curved sections of track and tends to ebb and flow as the weight of the train shifts from side-to-side as it negotiates the curve.
