A year and a half after being established the SKM initiated its operation with its first trains, opening a line from Warszawa Zachodnia along the cross city line to Warszawa Wschodnia and along the Vistula river to Warszawa Falenica. The new service failed to deliver on its promise to serve as a viable replacement due to the poor state of the rail infrastructure. Passengers within the city center preferred the more accessible trams system and few people wanted to use the trains in the southeastern districts of the city. Additionally, while the integrated fare system of the Warsaw Transit Authority offered a large convenience the modern look and relative cleanness of the rolling stock sharply contrasted with the standard found in the Polish railroad, during rush hours most of the slots on the tracks were taken up by regional traffic and the new EMUs suffered from the same technical problems as the ones they were based on.