(Bulgaria )SOFIA

Images kindly supplied by Sofia Metropolitan. (Thanks)
Musagenitsa stop	Vasil Levski Stadium stop	St. Kliment Ohridski stop
Serdika stop

Sofia
Sofia has a typical medieval urban shape, with a city center characterized by narrow streets connected to the suburbs by some main radials, supported by ring connections. Because of the increasing of private motorization (currently more than 500.000 motor vehicles), in the last decades the streets congestion along suburbs-center routes has constantly increased; this was one of the reasons for the construction of a modern metro system.
Sofia metro Line 1 (Obelya-Tsarigradsko Shosse) opened in 1998 (Slivnitsa Boulevard-Konstantin Velichkov Boulevard section, 6.4 km), with further extensions in 1998, 1999, 2000, 2003, 2009 and 2012. Line 1 will be completed by a southern (Sofia Business Park) and a south-eastern extensions (to the airport, under construction since 2009).
Line 2 it's under construction since December 2009 (Nadezhda-Lozenets section, with an intermediate stop at the railway station); the network in its final asset (52 km, 1 million pax/day) will have the tipical central triangle (Serdika, NDK and St. Kliment Ohridski stops).
Metropolitan.bg (official site)

CHRONOLOGY
28-01-1998	Slivnitsa-Konstantin Velichkov
17-09-1999	Konstantin Velichkov-Opalchenska
31-10-2000	Opalchenska-Serdika
20-04-2003	Slivnitsa - Obelya
08-05-2009	Serdika-Vasil Levski Stadium-Mladost 1
25-04-2012	Mladost 1-Tsarigradsko Shosse

Country	Bulgaria
Line	Line 1
Inhabitants	City 1.100.000, District 1.200.000
Date opening	1998
Future development:	southern (Business Park) and south eastern (Sofia Airport) extension (the latter under construction since 2009); Line 2 (Nadezhda-Lozenets section) under construction since December 2008; Line 3 planned
Length (km)	20.2
Track sections	totally underground
Stops	15 average distance m 1400
Platforms	--
Platform doors	no
general characteristics	--
n. of vehicles	--
n. of cars per vehicle	--
Type	steel wheels
Vehicle dimensions (m)	length -- width --
Vehicle capacity (pax)	--
Frequency	6 min/
Current/Voltage	825 V DC (third rail)
Guide/gauge	standard gauge rails (1435 mm)
Speed Km/h	Comm --, Max 90
Accel./Decel. (m/sec2)	--
System capacity	50.000 pphpd
Ridership	180.000 pax/day
Total cost	--
Staff	--
System builder	METROWAGONMASH
Model	81-740, 81-741
NOTE	--