Department of Transportation Homepage:
http://www.dot.gov/

Federal Motor Carrier Safety Administration Homepage:
http://www.fmcsa.dot.gov/

Federal Aviation Administration Homepage:
http://www.faa.gov/

Federal Railroad Administration Homepage:
http://www.fra.dot.gov/

Federal Transit Administration:
http://www.fta.dot.gov/

Pipeline & Hazardous Material Safety Administration Homepage:
http://www.hazmat.dot.gov/

United States Coast Guard Homepage:
http://www.uscg.mil/

Drug & Alcohol Testing Industry Association Homepage:
http://www.datia.org/

Substance Abuse Programs:
http://www.addictionsearch.com/treat_seeking.php

Safety and Fitness Electronic Records System:
http://www.safersys.org/