South Dakota CDL Study Guide
South Dakota issues Commercial Driver Licenses through the Department of Public Safety, Driver Licensing Program. CDL knowledge tests are administered at state exam stations, and skills tests are run by approved third-party testers. The official South Dakota CDL Manual is the primary study source.
Key South Dakota 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 South Dakota 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 knowledge test you can retake it after meeting Driver Licensing Program waiting requirements. The Commercial Learner Permit is valid for one year - if it expires before you pass the skills test, you must retake the knowledge tests.
Frequently asked questions
Who issues CDLs in South Dakota?
The South Dakota Department of Public Safety, Driver Licensing Program.
How much does a South Dakota CDL cost?
$33 for the CDL application plus $15 per endorsement knowledge test. Skills tests cost up to $90 plus tax.
Who runs the skills test in South Dakota?
Skills tests are run by approved third-party testers and must be scheduled at least two business days in advance.
What is the passing score on the General Knowledge test?
You must answer at least 80% of the 50 questions correctly.
How long is the South Dakota CLP valid?
One year. If it expires before you pass the skills test, you must retake the knowledge tests.
Is ELDT required in South Dakota?
Yes for CLPs issued on or after February 7, 2022. You must complete theory and behind-the-wheel training with an FMCSA-registered provider.
Free practice
Start a South Dakota General Knowledge quiz →
Sources: South Dakota DPS - Commercial Driver License hub South Dakota DPS - CDL Manual page South Dakota CDL Manual PDF South Dakota DPS - Driveru0027s License Fees