CDL study guides
8 guides on passing the CDL written exam, choosing endorsements, and starting a trucking career.
Take a free CDL practice testCDL basics
CDL basics
CDL Class A vs Class B
Compare CDL Class A and Class B licenses—vehicle types, career paths, training requirements, and pay differences—to choose the right path for your goals.
CDL basics
CDL General Knowledge Study Guide
Master CDL General Knowledge with this complete study guide covering pre-trip inspection, safe driving habits, accident procedures, and key federal regulations.
Exam prep
Exam prep
How Long to Study for the CDL Test
Plan your CDL study schedule with realistic timeframes for General Knowledge, Air Brakes, and endorsements—whether you're starting from scratch or refreshing.
Exam prep
How Many Questions Are on the CDL Test?
Find out how many questions are on the CDL written test for General Knowledge, Air Brakes, and endorsements—and learn what passing score you need in each state.
Exam prep
How to Pass the CDL Written Test
Learn proven strategies to pass your CDL written exam on the first try, with study tips, test-day advice, and free practice resources for every test section.
Endorsements
Endorsements
CDL Air Brakes Study Guide
Prepare for the CDL Air Brakes test with a focused breakdown of brake systems, pre-trip inspection steps, stopping distances, and the most common exam topics.
Endorsements
CDL Endorsements Explained
Understand every CDL endorsement—Hazmat, Tanker, Passenger, School Bus, Doubles/Triples—and when you need each one to boost your career and earning potential.