DMV-Written-Test helps aspiring commercial drivers in Idaho prepare with up-to-date practice exams based on the 2025 Idaho Commercial Driver License (CDL) Manual. These CDL practice tests simulate the real exam administered by the Idaho Transportation Department (ITD).
Whether you’re applying for a Class A, B, or C CDL, our practice tests cover all core areas including General Knowledge, Air Brakes, Combination Vehicles, and Idaho-specific trucking laws.
For official CDL manuals, testing procedures, and license requirements, visit the Idaho DMV CDL services page: https://itd.idaho.gov/itddmv/
Start practicing now and earn your CDL permit confidently in Idaho!
📘 What to Expect on the Idaho CDL Knowledge Test
Aspect
Details
Number of Questions
50 (General Knowledge)
Passing Score
80% (40 correct answers required)
Test Format
Multiple Choice
Time Limit
Usually 60 minutes
Minimum Age
18 (in-state); 21 for interstate CDL
Test Languages
English, Spanish (contact local office)
Endorsement Areas
HazMat, School Bus, Tankers, Doubles/Triples
Retake Policy
Retake allowed next business day (fee applies)
❓ Frequently Asked Questions
How do I qualify for a CDL permit in Idaho?
You must be at least 18 years old, hold a valid Idaho Class D license, pass a vision screening, and pass the General Knowledge test.
Do I need ELDT training to take the CDL test?
Yes. Entry-Level Driver Training (ELDT) is federally required before taking the skills test for first-time CDL applicants and certain endorsements.
How long is a CDL permit valid in Idaho?
CDL permits in Idaho are valid for 180 days and can be renewed once.
Can I take the CDL test in Spanish?
Yes. Some written tests are available in Spanish. HazMat must be taken in English only.
What happens if I fail the CDL knowledge test?
You must wait until the next business day to retake the exam. Additional fees may apply.
What license do I need before applying for a CDL?
You must have a valid Idaho Class D driver’s license.
Are endorsements tested separately?
Yes. Each endorsement (e.g., HazMat, Passenger, School Bus) requires a separate written test and sometimes a skills exam.
Can I transfer my CDL from another state to Idaho?
Yes. You must transfer it within 30 days of becoming an Idaho resident.
What documents are needed to apply for an Idaho CDL?
Bring proof of identity, Social Security number, Idaho residency, and legal presence.
Is there a minimum ELDT training provider requirement?
Yes. You must complete ELDT through a provider listed on the FMCSA Training Provider Registry (TPR).
