site.btaApril 29, 1980: Bulgaria's First Electrified Railway Ring Unveiled
Bulgarian socialist leader Todor Zhivkov (with bucket) unveils the first electrified railway ring in Pleven, Northern Bulgaria, April 29, 1980 (BTA Archive Photo/Zhivko Angelov)
With a length of 633 km, it services the Sofia - Gorna Oryahovitsa - Dubovo - Karlovo - Sofia route.
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