Karlín enjoys excellent public transport links, and as the neighborhood is crammed into a relatively narrow area, the main routes run on an east-west axis. The key corridors are Sokolovská Street, along which trams operate, parallel Křižíkova Street, and a metro line, much of which runs directly under Sokolovská Street. Florenc, Křižíkova and Invalidovna metro stations serve the district; the last two stations are on line B (Černý most to Zličín), which bisects line C (Letňany to Háje) at Florenc metro station, on the western edge of Karlín. The station is a key transport hub, and tram numbers 8 (Podbaba to Starý Hloubětín) and 24 (Kubánské námestí to Kobylisy) currently stop at the Sokolovská entrance. Prague´s main bus station is a minute´s walk away, and Masaryk train station (Masarykovo nádraží), while technically not in Karlín, is approximately 10 minutes walk from Florenc metro station. Prague´s main train station (Praha hlavní nádraží), from where international trains depart, is one stop away from Florenc station on metro line C. There are also good connections with the large stations at Holešovice (nádraží Holešovice) and Smíchov (nádraží Smíchov). Metro lines C and B respectively of Florenc metro station link it with these stations.