HDS Inc
www.hdsdrivers.com
HDS Inc and Choice Drivers Inc specialize in providing Class A CDL drivers to companies on a temporary, casual, or permanent basis.

HDS Safety Services
www.hdssafetyservices.com
HDS Safety Services is a national provider of Drug and Alcohol Testing Programs, Department of Transportation (DOT) Compliance Services, Federal Motor Carrier Safety Compliance Audits, and Training Courses.

Phoenix Truck Driving Institute
www.hdstruckdrivinginstitute.com
Phoenix Truck Driving Institute is a truck driver training school in Phoenix, Arizona that offers students the opportunity to develop both the technical knowledge and personal skills vital to employment in the ever-changing world of truck driving.

Bumper To Bumper
www.bumper2bumpertruckbook.com
Bumper To Bumper is the complete guide to tractor-trailer operations.

Federal Motor Carrier Safety Administration
www.fmcsa.dot.gov
The Federal Motor Carrier Safety Administration (FMCSA) is focused on reducing crashes, injuries, and fatalities involving large trucks and buses.

Arizona Commercial Driver License Manual
mvd.azdot.gov