Roads and bridges

Total highway, road and street lane miles: 3,532 (2008); bridges: 243 (2010)

Transit

Trips per year (all transit modes): Approximately 425.2 million (2008)

Rail

Freight rail route-miles: 23 (2008)

Aviation

Enplanements: 3 (2009)*
*This data is only for the Washington metropolitan area general aviation airport. Enplanements at commercial airports in the D. C. area are counted under Maryland and Virginia, where those airports are located.

Marine

Waterborne tonnage per year: 119,000 (2009)