The daily operation of the airports, their central administration, their police and fire departments and their payroll are not funded by tax dollars. Operating costs are paid through aircraft landing fees, rents for use of terminals and other facilities and revenues from concessions and parking. The Airports Authority is responsible for capital improvements at the airports, which are funded in part by passenger facility charges collected through airline tickets, Federal
Airport Improvement Program funds and the proceeds of bonds issued by the Airports Authority. In 2008, the Airports Authority’s responsibilities were expanded to include the operation of the Dulles Toll Road and management of the construction project to extend the metropolitan Washington region's
Metrorail mass transit system for from the existing
East Falls Church station in Virginia to Dulles International Airport and beyond into
Loudoun County, Virginia. Tolls collected on the Dulles Toll Road are used to operate and improve the Toll Road and fund a portion of the construction of the Metrorail extension project. Additional funding for the Metrorail project is supplied by federal grants and loans and by contributions from the
Commonwealth of Virginia, and Loudoun and
Fairfax counties in the commonwealth. The authority's headquarters is located less than from Reagan National Airport in the
Crystal City neighborhood of
Arlington County, Virginia. A third major airport in the Washington region,
Baltimore/Washington International Thurgood Marshall Airport (BWI) is located south of downtown
Baltimore. BWI Airport is not operated by MWAA, but is owned by the state of
Maryland, and operated through the
Maryland Aviation Administration, which purchased the then-named "Friendship Airport" from the city of Baltimore in 1972. == History ==