EN97 (a.k.a. 33WE) of a completely new design, requiring in the specification the possibility to convert them to the voltage used on the national rail network, these were delivered in 2012. In 2016 the overhead voltage has been switched from 600 to 3,000 V and all EN97s were converted to a new voltage. In the same year Warszawska Kolej Dojazdowa received 6 EMUs class EN100 (a.k.a. 39WE), manufactured by Newag (ordered in 2014). In 2020 Warszawska Kolej Dojazdowa started preparations to double-track the 7.5-km long Podkowa Leśna Główna – Grodzisk Mazowiecki Radońska section. This section was planned from the outset to be double track but for financial reasons only one track was built at the time. The works are expected to be completed by mid-December 2022. Route Starting as double-track from the Warszawa Śródmieście WKD terminus adjacent to the mainline Warszawa Centralna railway station, the line initially runs to the west alongside Warsaw's main east–west railway line before turning to the south-west on its own right of way. The length of the Warszawa Śródmieście WKD to Grodzisk Mazowiecki Radońska line is 33 km, and of the Milanówek branch 3 km. The stations are: Warszawa Śródmieście WKD Warszawa Ochota Warszawa Zachodnia Warszawa Reduta Ordona Warszawa Aleje Jerozolimskie Warszawa Raków Warszawa Salomea Opacz Michałowice Reguły Malichy Tworki Pruszków WKD Komorów Nowa Wieś Warszawska Kanie Helenowskie Otrębusy Podkowa Leśna Wschodnia Podkowa Leśnia Główna Podkowa Leśna Zachodnia Here the line splits into two single-track branches. The stations on the Milanówek branch (line 48) are: Polesie Milanówek Grudów The stations on the Grodzisk Mazowiecki branch (line 47) are: Kazimierówka Brzózki Grodzisk Mazowiecki Okrężna Grodzisk Mazowiecki Piaskowa Grodzisk Mazowiecki Jordanowice Grodzisk Mazowiecki Radońska There is a single-track non-electrified link between the Komorów station and the PKP rail network (Pruszków station), carrying no scheduled traffic. Operation The company's headquarters and the main technical depot are in Grodzisk Mazowiecki. The WKD is a standard gauge line and is electrified at 3 kV DC. Until May 2016, the railway line used 600 V DC as the only public railway line in Poland. Rolling stock The company also owns a vintage type EN80 four-axle electric unit, built by English Electric at Preston in 1927, and a small diesel shunter, obtained second hand from PKP. On the main line, trains operate every 15 minutes at peak hours and every 30 minutes off-peak, with a service gap between midnight and 05:00. For