Free study resources
Practice core commercial-driving concepts, receive immediate explanations, and download selected lessons for offline study.
Available now
Sixty original multiple-choice questions with automatic scoring and an explanation for every answer.
Review driver readiness, inspections, speed and space management, adverse conditions, railroad crossings, emergencies, and professional safety decisions.
Written-test preparation
Keep the three principal truck knowledge-test subjects together so you can see the complete study sequence before testing.
Study inspections, safe driving, speed and space management, cargo basics, railroad crossings, emergencies, and professional driving decisions.
Open General Knowledge →Review system components, inspection, warning devices, brake lag, fade, downgrade control, and safe operation. Includes 40 original practice questions.
Open Air Brakes →Study coupling, off-tracking, rollover risk, backing, combination braking, and inspection. Includes 40 original practice questions.
Open Combination Vehicles →Planning and review tools
Create a private roadmap on your device, review inspection areas and vocabulary, and compare schools and jobs.
Select your state, CDL class, air-brake needs, endorsements, and planned examination date. Receive a study sequence and calendar.
Create your study path →Select tractor-trailer zones and review the components and conditions that belong in a systematic inspection.
Practice inspection areas →Review the terms used in air brakes, coupling, inspection, testing, and commercial-driving work.
Review vocabulary →Compare training contracts and job offers using complete criteria instead of one advertised price or pay number.
Open decision tools →