Mississippi CDL Study Guide
The Mississippi Department of Public Safety (DPS) Driver Service Bureau issues Commercial Driver Licenses. DPS publishes the Mississippi CDL Manual (with supplement) on driverservicebureau.dps.ms.gov. Knowledge and road tests are taken at DPS Driver Service offices.
Key Mississippi 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 Mississippi 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 the General Knowledge test by missing more than 10 of the 50 questions or running out of the 1-hour time limit, you must restart the test process per DPS rules. If you fail the road test, schedule another attempt through DPS.
Frequently asked questions
What is the minimum age for a Mississippi CDL?
18 for intrastate driving and 21 for interstate driving or hazardous materials.
How long must I hold a Mississippi CLP before the skills test?
At least 14 days. The CLP is valid for 12 months.
How much does a Mississippi CDL cost?
$29 application + $16 CLP + $55 license. Endorsements are $5 each.
Does Mississippi require ELDT?
Yes. First-time CDL applicants and first-time P, S, or H endorsement applicants must complete ELDT before the road test.
What is the passing score on the Mississippi CDL General Knowledge test?
80%. You have one hour and may miss no more than 10 of 50 questions.
Where is the official Mississippi CDL Manual?
On the Mississippi DPS Driver Service Bureau website at driverservicebureau.dps.ms.gov.
Free practice
Start a Mississippi General Knowledge quiz →
Sources: Mississippi DPS Driver Service Bureau CDL Manual Mississippi Combined CDL Driver Manual with Supplement PDF Mississippi DPS New CDL Class A, B, C Mississippi DPS Driver Service Fees