Reference Sources

The Reference Shelf
This reference collection consists of major US Department of Transportation and other resources that provide an overview of the transportation system and the transportation community.

Transportation Libraries Directory
In addition to the USDOT Library, and the Volpe National Transportation System Center Library, use this Directory of Transportation Libraries to locate other useful transportation libraries.

NTL Reference Service
Ask our reference librarians for research assistance via E-mail, or
Browse through our FAQs database or select a Quick Answer from this page:

Reference Librarians
Contact a National Transportation Library or other staff person for assistance. We suggest you try the other resources on this page before sending your questions. Current turn-around times for questions submitted are about 24-hours for statistical questions and 2 to 3 business days for other questions.