- U.S. Department of Transportationwww.transportation.gov
- U.S. General Services Administrationwww.gsa.gov
- U.S. Department of Homeland Security – Transportation & Logisticswww.dhs.gov
- U.S. BUREAU OF LABOR STATISTICSwww.bls.gov
- Federal Motor Carrier Safety Administration (FMCSA)www.fmcsa.dot.gov
