Dallas Area Rapid Transit (DART) is a transit agency serving the Dallas–Fort Worth metroplex of Texas. It operates buses, light rail, commuter rail, and high-occupancy vehicle lanes in Dallas and twelve of its suburbs. DART was created in 1983 to replace a municipal bus system and funded expansion of the region's transit network through a sales tax levied in member cities. DART Light Rail began operation in 1996 and has grown to become the longest light rail system in the United States, at over 93 miles (149.7 km). With 43,400 weekday boardings in 2020, DART Light Rail had the 5th highest ridership of light rail systems in the United States. DART jointly operates the Trinity Railway Express commuter rail line between Dallas and Fort Worth, with Trinity Metro. The agency also operates the Dallas Streetcar and provides funding for the non-profit McKinney Avenue Streetcar.