Sweco to design a section of Sofia Metro Line 3, Bulgaria July 4, 2018 | Europe News Sweco Energoproekt (Sweco) has secured EUR489,800 contract from Metropolitan JSC to design 5.6-km long section of Sofia Metro Line 3. The section will connect parts of the city centre with the eastern... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password