Public transit in Budapest is provided by the Centre for Budapest Transport (BKK, ''Budapesti Közlekedési Központ''), one of the largest transportation authorities in Europe. BKK operates 4 metro lines (including the historic Line 1, the oldest underground railway in continental Europe), 5 suburban railway lines, 33 tram lines, 15 trolleybus lines, 264 bus lines (including 40 night routes), 4 boat services, and ''BuBi'', a smart bicycle sharing network. On an average weekday, BKK lines transports 3.9 million riders; in 2011, it handled a total of 1.4 billion passengers. In 2014, the 65% of the passenger traffic in Budapest was by public transport and 35% by car. The aim is 80%–20% by 2030 in accordance with the strategy of BKK.