Scheme of the metro sections in operation

 NUMBER OF ROUTES

 - 2  

 TOTAL LENGHT OF LINES

 - 40 km and 35 metro stations, incl.: 

 - Line M 1 - Slivnitsa - Business Park

 - 16 stations (13 shared with M 4)

 - Line M 2 - Vitosha - Obelya

 - 12 stations

- Line М 3 - Hadzhi Dimitar - Tsar Boris III Blvd./Krasno selo

 - 8 stations

- Line M 4 - Obelya - Sofia Airport

 - 20 stations (13 shared with М 1)

 AVERAGE DISTANCE BETWEEN STATIONS 

 - 1000 m

 TRANSPORT CAPACITY

 - 50 thougsand passengers/hr

 MAXIMUM TRAVEL SPEED

 - 80 km/hr

 RAIL GAUGE

 - 1435 mm

 POWER SUPPLY – CONSTANT VOLTAGE THROUGH THIRD RAIL (LINE 1 AND 2)
AND PANTOGRAPH (LINE 3) 

 - 825 V

 MUNIMAL HEADWAY

 - 180 sec.

 NUMBER CARRIED PASSENGERS/DAY

 - 340 thousand passenger