CDL — Bằng Lái Thương Mại in Connecticut

Testing agency

Connecticut DMV

Written-test languages

English · Spanish

To pass

80% (General Knowledge 40/50; Air Brakes 20/25; HazMat 24/30)

Fee

General knowledge test $16; air brakes $5; each other endorsement $5

Retake policy

Make a new appointment and pay the test fee again (no stated knowledge-test wait period; skills test 7-day minimum)

Languages note

General CDL knowledge test + related endorsements in English and Spanish only; HazMat and school-bus endorsement tests English only. No interpreters (federal law). The 9-language list is the non-commercial Learner's Permit test.

Languages, fees and rules change — confirm with the official source linked for each state. 待核 / 'To confirm' = not yet confirmed from an official source (shown honestly, never guessed). The 2025 federal English-Language-Proficiency action is roadside out-of-service enforcement, not a state test-language mandate; states set their own written-test languages (Texas and Florida moved to English-only in 2026).