The Warsaw–Łódź railway line is a key railway connection in Poland, linking the capital city of Warsaw with the city of Łódź. This line plays a crucial role in facilitating passenger and freight transport between these two important urban centers, enhancing economic and social interactions. Opened in the mid-19th century, the railway line has undergone various upgrades to improve efficiency and service quality. It is part of the broader Polish railway network, which supports regional connectivity and contributes to the overall development of the country's transportation infrastructure.