Connecticut CDL Study Guide
Connecticut issues Commercial Driver Licenses (CDLs) through the Department of Motor Vehicles (DMV). You study the Connecticut CDL Manual, apply for a Commercial Learner's Permit (CLP) at a DMV office, pass written knowledge tests, hold the CLP at least 14 days, finish federally required Entry-Level Driver Training (ELDT), then pass the road skills test.
Key Connecticut 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 Connecticut 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 Connecticut CDL knowledge or skills test, you may schedule a retake and pay the applicable fee again. Your CLP must still be valid (1-year term). If your CLP expires, all knowledge tests must be retaken.
Frequently asked questions
Who issues CDLs in Connecticut?
The Connecticut Department of Motor Vehicles (DMV), headquartered in Wethersfield, issues CDLs at DMV offices statewide.
What does a Connecticut CDL cost?
$16 knowledge exam, $10 CLP, $30 (prepaid) skills test, $5 per endorsement, and $70 for the CDL license.
How long must I hold my Connecticut CLP?
At least 14 days before you can take the CDL skills test. The CLP is valid for one year.
Whatu0027s the minimum age for a Connecticut CDL?
18 for intrastate driving (within Connecticut). 21 for interstate, hazmat, and many passenger jobs.
How many questions are on the Connecticut General Knowledge test?
50 multiple-choice questions; you need 40 correct (80%) to pass.
Is ELDT required in Connecticut?
Yes. First-time Class A or B applicants and first-time H, P, or S endorsement applicants must finish FMCSA-approved ELDT before taking the road skills test.
Free practice
Start a Connecticut General Knowledge quiz →
Sources: CT DMV Get a Commercial Driver License Connecticut CDL Manual (PDF, rev. 11-20-2024) CT DMV Fees CT DMV Get a Commercial Learneru0027s Permit