SL (Storstockholms Lokaltrafik) is the public transportation authority for the Stockholm region in Sweden. It operates various modes of transport, including buses, trains, trams, and the subway, ensuring efficient travel across the city and surrounding areas. Founded in 1967, SL aims to provide accessible and sustainable transport solutions for residents and visitors. The organization manages ticketing systems and schedules, making it easier for users to navigate the extensive network of services available in the Stockholm metropolitan area.