Warszawa Zachodnia-Katowice line

Railway line 1 is a double-track, electrified railway line running across the Masovian, Łódź and Silesian Voivodeship, and as such serving as the main railway artery between Warsaw and Katowice.^[1][2]

The line initially opened as part of the Warsaw–Vienna railway.

Source:^[3]

In June 2025, a contract was signed for the modernization of the Koluszki–Częstochowa section. The project includes track replacement on selected sections, the installation of 24 new turnouts at major stations, track geometry improvements, and the renovation of four bridges and a viaduct in Częstochowa. Train speeds on the upgraded sections are planned to increase from 120 km/h to 160 km/h, improving both efficiency and safety. Station platforms will also be rebuilt to meet technical standards for higher speeds.

Modern signalling systems will be installed on the Koluszki–Piotrków Trybunalski and Rudniki sections, including automatic block signalling, which will increase line capacity and enable more frequent services. Safety at crossings will be improved through upgrades at 37 level crossings and two pedestrian crossings, equipped with new warning lights and barriers.