Would be curious to see how railways around the world are adapted to their climates. The WOLO boards in Sydney are opened when ≥38°C is forecasted but in practice the speed restrictions don't affect OTR that much and even on days above 45°C cancellations aren't a thing. On the flipside, I imagine the rails would just shatter if it ever got to -10°C.
Spain seems fine too. Can get properly hot but doesn't have the heat related cancellations either.
But then you have the UK where it goes above 35°C rails warp and aircon fails, rails shatter or the wrong type of snow in winter, leaves on the line in autumn, and insects in spring. Four distinct seasons just like Japan!>>6024
All of Sydney is CWR and does fine. Keep the fasteners really tight for stability~