Stockholm Tram Line 7 extension to T-Cenralen opens, feasibility for extension to Ropsten in 2019 September 5, 2018 | Europe News Passenger services have begun on Stockholm Tramway Line 7 extension. The extension spans 560 metres from Sergals Torg to T-Centralen, covering one station. It provides interchange facility with subway... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password