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CDL — Commercial Driver's License in Iowa
Iowa DOT, Motor Vehicle Division
Real written-test languages: English
- Testing agency
- Iowa DOT
- Written-test languages
- English
- To pass
- 80% (General Knowledge 40/50; may miss 10)
- Fee
- No separate knowledge-test fee; CLP $12 (1 yr), CDL $8/year (8-yr)
- Retake policy
- To confirm (no official knowledge-test wait/attempt limit published)
- Languages note
- Iowa's 19-language knowledge-test program is the operator (non-commercial) test only; commercial testing is English only (federal). HazMat endorsement English only. FMCSA 49 CFR 391.11 requires English proficiency to drive commercially.
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).