||The ‘Real cost’ values have been adjusted for inflation and PPP.
Sections of the line constructed in trench are represented with the same line style as the at-grade sections.
The project maps are based on information retrieved from OpenStreetMap and our research. Please contact us if you have more accurate information regarding this project.
* First 7.8 km opened in 2020: https://www.railwaygazette.com/operations-and-services/most-beautiful-and-cheapest-metro-line-opens-in-sofia/57242.article