Sofia Metro Extension Project, Third Metro Line - Botevgradsko Shosse Blvd. - Vladimir Vazov Blvd. - Central part of the city - Ovcha Kupel residential area, stage II with four metro stations; separate position № 2 - near MC 18 with 2 metro stations - working shaft for implementation of TU under NATM
| Client: | SOFIA MUNICIPALITY / "METROPOLITEN" Jsc. |
| Architecture: | BIAS-M Ltd, arh.Evangelina Sirakova |
| Main contractor: | METROBUILD WEST ASSOCIATION |
| Facility length: | 900 m |
| Design: | Complex design |
| Technology and features: | - metro tunnel built by Top-Down method on slotted walls, monolithic reinforced concrete |
| - ventilation system (VU) - partially Top-Down, partially open method, monolithic reinforced concrete | |
| - tunnel section built in an open way from monolithic reinforced concrete | |
| Phase/stage: | in operation since 2021 |
