[4] The system's approximately 160 kilometres (100 mi) of single track — making it the largest tram network in Northern Europe[5] — is used by around 200 trams as of 2006[update], which serve twelve day-time and five night-time lines with a combined line length of 190 km.

These figures are expected to increase when the second stage of Kringen (short for Kollektivringen, the public transport ring) is finished.

In the 1960s, plans for converting the tram system to an underground rapid transit system were created, and the new tram sections to the Tynnered, Angered, Bergsjön and Länsmansgården suburbs were built free from level crossings and partly in tunnels to make a future conversion to underground standards easier.

The expansion of the net through the Kringen is gradually creating a tramway ring around the city centre.

Most tram lines pass through Brunnsparken, which is effectively the central hub of public transport in Gothenburg.

By April 2016, it was announced that a minimum 40 trams of the new model M33 had been ordered from Bombardier Transportation Sweden AB/Vossloh Kiepe GmbH for delivery by year 2019.