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Citation
Photo Credits
Front cover
Ship in Baltimore Harbor
Dennis Roos, Sr.
Back cover
Passenger train
National Railroad Passenger Corporation (Amtrak)
Bureau of Transportation Statistics
For additional copies of this guide or information about BTS and its products
and services, contact:
Product Orders
Internet: www.bts.gov
Mail: Product Orders
Bureau of Transportation Statistics
Research and Innovative Technology Administration
U.S. Department of Transportation
400 Seventh Street, SW, Room 4117
Washington, DC 20590
Information Service
Phone: 1-800-853-1351
Email: answers@bts.gov
January 2007
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