It seems most tracks today are welded for less maintenance: https://en.m.wikipedia.org/wiki/Track_(rail_transport)#Continuous_welded_rail https://en.m.wikipedia

It seems most tracks today are welded for less maintenance: https://en.m.wikipedia.org/wiki/Track_(rail_transport)#Continuous_welded_rail https://en.m.wikipedia.org/wiki/Track_(rail_transport)#Conti...