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Tennessee's Interstate System - Other Important Links
This online publication includes a listing of all Interstate routes, their lengths, and principal cities served. The publication is updated periodically.
This is a time line of significant events in the history of highway transportation in America from 1892.
The home of the U.S. Department of Transportation Federal Highway Administration, resource for many statistics on the development and current use of the Interstate system.
A site which collects a wealth of interstate history.