Sofia, the capital of Bulgaria, has the only tram network in the country with a length of 280 kilometers. Of these, 112 kilometers are on the rare 1009 mm gauge and 40 kilometers on standard gauge (1435 mm). On line 20 Iskar depot - Iskar station - Iskarsko Chaussee - Druzhba-1 residential complex - Assen-Jordanov Boulevard - Geo Milev bus station - Shipchensky Prokhod Boulevard - Geo Milev residential complex - Sitnyakovo Boulevard - Podujane station - Madrid Boulevard - Sofia Theater - Prince Alexander Dondukov Boulevard - Youth Theater - Batsho - Kiro Street (only in the direction of Opalchenska metro station) / Weslez Street (only in the direction of Iskar depot) - Central Market Hall - Schenski Market - Pirotska Street - Opalchenska metro station is the standard gauge railcar # 4121 of type T6B5 built by CKD Tatra in Czechoslovakia in service, together with # 4123, both built in 1988.
