Trams in Stockholm

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Stockholm tramway network
Old and new tram on Tvärbanan, 2010.
Operation
Locale	Stockholm, Sweden
Status	Operational
Routes	4 regular 1 heritage line
Owner(s)	Storstockholms Lokaltrafik (Stockholm Regional Council)
Operator(s)	AB Stockholms Spårvägar (lines 7, 7N & 21) Arriva (lines 12 & 22)
Infrastructure
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Minimum curve radius	17.5 m (57.4 ft) (7, 7N) 25 m (82 ft) (12, 22)
Propulsion system(s)	Electricity
Electrification	750 V DC from overhead catenary
Stock	194
Horsecar era: 1877 (1877)–1905 (1905) Status Closed Operator(s) Stockholms Nya Spårvägsaktiebolag (SNS) Stockholms Södra Spårvägsaktiebolag (SSB) Track gauge 1,435 mm (4 ft 8+1⁄2 in) standard gauge Propulsion system(s) Horses
First electric tram era: 1901 (1901)–1967/1991 (1967/1991) Status Closed (urban network) /Open (suburban lines 12 & 21) Operator(s) SNS (1901–1917) SSB (1904–1918) AB Stockholms Spårvägar (SS) (1917–1966) Storstockholms Lokaltrafik (SL) (1967) Track gauge 1,435 mm (4 ft 8+1⁄2 in) standard gauge Propulsion system(s) Electricity
Second electric tram era: since 1991 (1991) Status In service Owner(s) Storstockholms Lokaltrafik (Stockholm County Council) Operator(s) AB Stockholms Spårvägar (lines 7, 7N & 21) Arriva (lines 12 & 22) Track gauge 1,435 mm (4 ft 8+1⁄2 in) standard gauge Propulsion system(s) Electricity Electrification 750 V DC from overhead catenary
Website	http://sl.se/en/Visitor/Plan-your-journey/ AB Storstockholms Lokaltrafik (in English)

The Stockholm tramway network forms part of the public transport system in Stockholm, the capital city of Sweden.

Beginning with horse trams in 1877, the Stockholm tram network reached its largest extent in 1946. Many of the former suburban tram lines became parts of the Stockholm Metro between the years 1950-1964. In September 1967, in conjunction with the Swedish switch from left-hand to right-hand traffic, the last parts of the once large inner city street running tram network were closed. What little remained of the former network following 1967 were isolated suburban feeder lines to the Metro.

However, in 1991 a 3 km (1.9 mi) long heritage line opened to the recreational area Djurgården; and in 2000, the non-radial half-circle line Tvärbanan opened with articulated low floor vehicles connecting an inner ring of Metro and commuter rail stations just outside the inner city proper, with subsequent extensions in 2003 and 2014; and in 2010 the heritage line was extended and converted to a regular service line.