Szybka Kolej Miejska[2] (SKM; which translates as 'Rapid Urban Rail') is a mixed rapid transit and commuter rail system in the Warsaw metropolitan area, operated by the city owned company Szybka Kolej Miejska Sp. z o.o. under the management of Public Transport Authority in Warsaw on shared, general railway lines managed by the PKP Polskie Linie Kolejowe.
Szybka Kolej Miejska is a local railway carrier and one of the elements of Warsaw Public Transport.