Washington Metropolitan Area Transit Authority (WMATA or the Metro) operates the second largest rail transit system (Metrorail) and one of the largest bus networks (Metrobus) in the US. Transporting roughly a third of federal government employees to work and millions of tourists, its transit service zone covers Washington, DC and neighboring counties and suburbs in Maryland and Virginia. The authority's rail system consists of about 90 stations served by more than 115 miles of track, both underground and aboveground. It operates a fleet of about 1,400 buses. WMATA also offers MetroAccess paratransit service for eligible people with disabilities.