District of Columbia Fast Facts 2000  

Transportation System Extent

All public roads: 1,425 miles
Interstate: 13 miles
Road bridges: 250
Class I railroad trackage: 34 miles
Inland waterways: 7 miles
Public use airports: 2¹

Vehicles and Conveyances

Automobiles registered: 200,000
Light trucks registered: 32,000
Heavy trucks registered: 200
Buses registered: 2,600
Motorcycles registered: 1,500
Rail transit systems: 2 commuter rail, 1 heavy rail (subway)
Numbered boats: 2,800

Geographic

Land area: 61 sq. miles (rank: 51)
Percent of land area owned by federal government: 22.7² (rank: 13)
Persons per square mile: 9,316.4 (rank: 1) 
Highest point: Tenleytown at Reno Reservoir (410 ft.)
Lowest point: Potomac River (1 ft.)

Demographic

Population: 572,059 (rank: 50)
Percent urban population: 100³ (rank: 1)

Socioeconomic

Gross state product: $55 billion² (rank: 36)
Civilian labor force: 279,000² (rank: 50)
Median household income: $38,752 (rank: 33)

Commuting (percent of workers)

Car, truck, or van—drove alone: 39.8
Car, truck, or van—carpooled: 8.4
Public transportation (including taxi): 35.0
Walked: 10.4
Other means: 2.3
Worked at home: 4.1

State Transportation Department

District Department of Transportation
2000 14^th Street, NW
Washington, DC  20009
(202) 673-6813
http://www.ddot.dc.gov/

¹ 2002.  Refers to Washington Dulles International and Ronald Reagan Washington National.  See table 1-7 for more detail.

² 1999.

³ 1990.

Note: Ranks are relative to state ranks.