Why do subways, metro make less noise compared to traditional railways ?

Question

Is it because they are lighter ??

In: Engineering

Answer 1

And anyone who has lived in the Bay Area will tell you that it’s not always the case. The old BART trains were *loud*. Not the big rumble of a freight train, but a piercing metallic screech from the wheels that you could hear for miles. New trains are slightly better with an updated wheel design.