Vienna U-Bahn

Key facts

Native name

U-Bahn Wien

Locale

Vienna, Austria

Transit type

Rapid transit

Line number

(future)

Annual ridership

404.8 million (2023)

Website

Wiener Linien

Began operation

8 May 1976 ( 1976-05-08 ) (test operation) 25 February 1978 ; 48 years ago ( 1978-02-25 ) (official opening)

Operator s

Wiener Linien

Headway

2–15 minutes

System length

83.9 km (52 mi 11 ch)

Track gauge

1,435 mm ( 4 ft 8 + 1 ⁄ 2 in )

Electrification

750 V DC third rail (U1–U4) 750 V DC overhead lines (U6)

Average speed

32.5 km/h (20.2 mph)

Top speed

85 km/h (53 mph)

via Wikipedia infobox