Stockholm metro

The Stockholm metro (Swedish: Stockholms tunnelbana) is a metro system in Stockholm in Sweden. The first line was opened in 1950. However, underground trams had been used since 1933. The system has 100 stations in use,^[1] 47 of them are underground and 53 above ground. There are three lines (Green, Red and Blue) travelling through Central Stockholm. In the year of 2013 the Stockholm metro cars totally carried 328 million passengers inside.^[2] It corresponds to approximately 898,630 passengers per day.

Stockholm metro
A C14 Red line train towards Norsborg in Bredäng
A C20 stock Green line train at Skärmarbrink
Overview
Native name	Stockholms tunnelbana
Locale	Stockholm, Sweden
Transit type	Rapid transit
Number of lines	7
Number of stations	100[1]
Daily ridership	898,630 (average, 2013)
Annual ridership	328 million (2013)[2]
Website	SL Official Site (in English)
Operation
Began operation	30 September 1933 (as premetro) 1 October 1950 (as metro)
Operator(s)	MTR Corporation
Train length	140 metres (460 ft)
Technical
System length	105.7 km (65.7 mi)[1]
Track gauge	1,435 mm (4 ft 8 1⁄2 in) (standard gauge)
Top speed	80 km/h (50 mph)

The 105.7 kilometres (65.7 mi) long metro system^[1] is owned by the Stockholm County Council through Storstockholms Lokaltrafik (SL). The operation is currently contracted to MTR Corporation.

The Stockholm metro system has been referred to as the"world's longest art gallery",^[3] with more over 90 of the network's 100 stations being decorated with various works of art.