Warsaw Commuter Railway (, WKD) is a light rail commuter line in Poland's capital city of Warsaw. The line, together with its two branches, links Warsaw with the municipalities of Michałowice, Pruszków, Brwinów, Podkowa Leśna, Milanówek and Grodzisk Mazowiecki to the south-west of Warsaw. History Source: The line was constructed and operated under the original name Elektryczne Koleje Dojazdowe (Electric Commuter Rail) by a privately owned electrical power industry consortium Siła i Światło (Power and Light) established with the participation of British capital shortly after Poland regained independence after World War I in 1918. The consortium sought to build an electric railway in order to accelerate economic development and increase the demand for its services. To achieve this goal it created in 1922 the company Elektryczne Koleje Dojazdowe S.A., owned in 40% by Siła i Światło, 25% by one of the financing banks and the remaining 35% held by small shareholders. In 1924 the company received a concession from the ministry of transport to build a private railroad from Warsaw through Grodzisk Mazowiecki to Żyrardów, under the condition that it would be run at least 2 kilometers from the existing line of the former Warsaw-Vienna Railway owned by the Polish State Railways (PKP). The work began in Komorów and proceeded simultaneously in two directions. In 1927 a 32.4 kilometres long standard gauge line electrified at 650 V DC with overhead wire was opened, linking Grodzisk Mazowiecki with the center of Warsaw. The line was connected with a 3 kilometre long non-electrified technical line with the national rail system in Komorów, 24 kilometres of the line between Podkowa Leśna and Warsaw consisted of double track, the four kilometres long segment of the line leading to the railroad's final station in Warsaw at Marszałkowska Street was street-running. The railroad operated 20 four-axle electric railcars produced by the English Electric Company at Preston, capable of travelling at a speed of up to 70 km/h, along with 20 unpowered passenger cars. In 1932 the line was extended in Grodzisk Mazowiecki to reach Grodzisk Mazowiecki PKP station and a short branch line was built in Włochy just outside Warsaw, likewise linking with the Włochy PKP station. In 1936 a branch line was opened from Podkowa Leśna to Milanówek PKP station. Before the outbreak of World War II work was initiated on the construction of a second line from Komorów to Nadarzyn and Mszczonów. The Elektryczna