Alabama CDL Study Guide
The Alabama Law Enforcement Agency (ALEA), through its Driver License Division, issues Commercial Driver Licenses. ALEA publishes the Alabama CDL Manual (updated April 2024) and a supplement on alea.gov. CDL knowledge tests are taken at ALEA Driver License offices.
Key Alabama numbers
- Minimum age (intrastate): 18
- Minimum age (interstate or hazmat): 21
- CLP hold before skills test: at least 14 days
- General Knowledge passing score: 80%
- General Knowledge test: ~50 questions
- Air Brakes test: ~25 questions (required if your vehicle has air brakes)
- Combination Vehicles test: ~20 questions (required for Class A)
Topics on the Alabama General Knowledge test
- Vehicle inspection (pre-trip, en-route, post-trip)
- Driving safely (speed management, space management, hazard perception)
- Transporting cargo safely
- Air brakes (if your vehicle is air-braked)
- Combination vehicles (Class A)
If you fail a test
If you fail a CDL knowledge test, you can retake it after the ALEA-required wait. The $20 skills test fee is paid per attempt. Confirm scheduling rules at your ALEA office.
Frequently asked questions
What is the minimum age for an Alabama CDL?
18 for intrastate driving and 21 for interstate driving or hazardous materials.
How long must I hold an Alabama CLP before the skills test?
At least 14 days, per federal rule.
How much does an Alabama CDL cost?
$25 testing + $36.25 CLP + $20 skills test. CDL license: $66.25 Class A, $56.25 Class B, $36.25 Class C. Endorsements $5 each.
Does Alabama require ELDT?
Yes. First-time CDL applicants and first-time P, S, or H endorsement applicants must complete ELDT through an FMCSA-registered provider. Theory comes before skills training.
Where is the official Alabama CDL Manual?
On the ALEA website at alea.gov/dps/driver-license/driver-license-manuals. The current edition was updated April 2024.
What score do I need to pass the Alabama CDL knowledge tests?
80% or higher on each test.
Free practice
Start an Alabama General Knowledge quiz →
Sources: ALEA Driver License Manuals Alabama CDL Manual (April 2024 PDF) Alabama CDL Manual Supplement for Modernized Version ALEA Document Requirements u0026 Fees