The largest Belgian urban public transport company, the Société des Transports Intercommunaux de Bruxelles, serves the 19 municipalities of the Brussels Capital Region as well as 11 other outlying municipalities. It covers a surface area of 241.5 km² and provides transport for a population of over 1,100,000 inhabitants and thousands of commuters. The STIB network has 4 metro lines, 18 tram lines, 51 bus lines and 11 night bus lines. In 2019, 434 million people chose public transport to get around the capital.