Here's what SBB (the Swiss train operator) says at [0], german only: SBB will not rely on tracks painted white because - it makes it harder to discover cracks

Here's what SBB (the Swiss train operator) says at [0], german only: SBB will not rely on tracks painted white because - it makes it harder to discover cracks in the tracks - with prolonged use the effect noticeably lessens to due accumulation of dirt - ÖBB and SBB have measured he effect at ~5°C and that's not significant enough to be worth it. [0] https://company.sbb.ch/de/medien/dossier-medienschaffende/sommerdienst-sbb.html https://company.sbb.ch/de/medien/dossier-medienschaffende/so...