Tehran Metro Line 6 Phase 1 opens, Iran April 8, 2019 | Middle East & Africa News Passenger services have commenced on Tehran Metro Line 6 Phase 1. Phase 1 spans 9 km (underground) and covers three stations. A 15-km extension of the line is expected to open by March 2020. Wh... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password