Fascinating how such a simple solution is so timelessly effective. A "framework" going two centuries strong.
High speed track uses ballastless track because at high speeds, making gravel fly is very damaging. (It also tends to be noisier and less smooth.) https://en.wikipedia.org/wiki/Ballastless_track
> Therefore, ballastless tracks must be concreted within a tolerance of 0.5 millimetres
Wow.
Personally, I'm on desktop all the time and I am peeved by people who post "m." links because the mobile version hides some useful features.