Double-track railway - Wikipedia

So I decided to simplify Wikipedia's map(s) of double-track-railway-headedness per country (Source(s) in comments). Please tell me if I messed up, I'm partially colorblind :( : r/MapPorn

Rail transport in Indonesia - Wikipedia

Double Decker Suburban Stock, Trainways Official Wiki

Double-track railway - Wikipedia

Quadruple-track railway - Wikipedia

Rail transport in Germany - Wikipedia

Railway signalling - Wikipedia

Rail transport in Thailand - Wikipedia

Double-track railway - Wikipedia

Railroad tie - Wikipedia

Rail transport in India - Wikipedia

Rail transport - Wikipedia

Istanbul–Ankara railway - Wikipedia

Double Cross-Over Track, Thomas Wooden Railway Wiki