Warsaw cross-city line is a 7 km railway line crossing downtown Warsaw in the East-West direction. Opened in 1933 and electrified in 1936, it initially had two tracks, with additional two added in 1949.
The central part of the line is in a tunnel (2310 m long); it crosses the Vistula by a bridge (also known as Railway Bridge) located between Poniatowski Bridge and Swietokrzyski Bridge.