An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Excel | CSV | Table Version
Maryland United StatesSOURCES: U.S. Department of Transportation, Federal Highway Administration, National Bridge Inventory: Deficient Bridges by State and Highway System,...
Excel | CSV | Graphic Version
(Miles)
Interstate Other Freeways and Expressways Other Principal Arterial Urban Minor Arterial Urban Collector Total 238 195 632 434 103 Very good 4 8 14 0 0 Good 110 75 128...Excel | CSV | Table Version
NOTE FOR DATA ON THIS PAGE: Road condition is based on measured pavement roughness using the International Roughness Index (IRI). IRI is a measure of surface condition. A...
Excel | CSV | Graphic Version
(Miles)
Interstate Other Principal Arterial Minor Arterial Major Collector Total 226 535 951 1,376 Very good 17 54 18 85 Good 163 339 535 354 Fair 34 130 382 844 Mediocre...Excel | CSV | Table Version
NOTE FOR DATA ON THIS PAGE: Road condition is based on measured pavement roughness using the International Roughness Index (IRI). IRI is a measure of surface condition. A...
All public roads: 30,494 miles Interstate: 481 miles Road bridges: 4,963 Class I railroad trackage: 835 miles Inland waterways: 532 miles Public use airports: 35 (4 certificated for air carrier operations)1
Vehicles and Conveyances...British thermal unit (Btu): The amount of energy required to raise the temperature of 1 pound of water 1 degree Fahrenheit (F) at or near 39.2 degrees F and 1 atmosphere of pressure.
Certificated airport: An airport holding an operating certificate issued by the Federal...
The U.S. Department of Transportations (USDOT) Bureau of Transportation Statistics (BTS) collects and compiles data on the volume of revenue passengers, freight, and mail traffic handled and reported by the nations large...
Norman Y. Mineta Secretary
Michael P. Jackson Deputy Secretary
Bureau of Transportation StatisticsAshish K. Sen Director
Rick Kowalewski Deputy Director
Susan J. Lapham Associate Director for Statistical Programs...
2002
Table of Contents File Formats Entire Report PDF (2.08MB) ...