Hacker News new | past | comments | ask | show | jobs | submit login

In Europe most high speed rails use dedicated tracks. For example, tracks for high speed trains are welded together, unlike tracks for slower trains. Instead of leaving a small gaps along the track, high speed tracks deal with thermal expansion by pre-stressing the tracks with hydraulic tensors [1] as they are welded (so high speed trains have no too-toom-too-toom :-))

[1] https://en.m.wikipedia.org/wiki/Rail_stressing

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

AFAIK basically all new rail installations, even freight, are continuous rail. At least in the US. Been that way for quite a while now.

Guidelines | FAQ | Support | API | Security | Lists | Bookmarklet | Legal | Apply to YC | Contact