https://en.wikipedia.org/wiki/Tehran_Metro
https://www.railway-technology.com/projects/tehranmetro/?cf-view
urbanrail.net/as/ir/tehr/tehran.htm
https://www.express.co.uk/travel/articles/1952784/tehran-train-line-iran
https://mapa-metro.com/en/iran/tehran/tehran-metro-map.htm
https://www.reddit.com/r/transit/comments/1rtyx70/tehran_metro_appreciation_post_i_had_no_idea_the/
https://orienttrips.com/mag/tehran-metro-map/
https://www.visitouriran.com/blog/complete-guide-to-tehrans-metro-lines/
