Lower Silesian Agglomeration Railway
The Lower Silesian Agglomeration Railways (Polish: Dolnośląskie Koleje Aglomeracyjne) is a suburban rail network for the Wrocław agglomeration, covering approximately 350 km of mostly electrified double-track lines within the PKP network. Since 2009, Wrocław's authorities have been developing the system, operated primarily by regional rail operators Lower Silesian Railways and Polregio.
Source: Wikipedia — Lower Silesian Agglomeration Railway (CC BY-SA 4.0)