Hawaii CDL Practice Test 2025

Hawaii CDLs are issued through county-level licensing offices operating under the Hawaii Department of Transportation (DOT), Highways Division. The specific offices are: City and County of Honolulu (for Oahu residents), Maui County (for Maui, Molokai, and Lanai residents), Hawaii County (for Big Island residents), and Kauai County (for Kauai residents). CDL applicants must visit the county licensing office for their island to take knowledge tests, submit a DOT medical certificate, and complete the CDL skills test.

All Hawaii CDL applicants must pass the General Knowledge test. Additional tests depend on the vehicle class and endorsements required: Combination Vehicles (Class A), Air Brakes (if the vehicle has air brakes), Passenger Transport, Hazardous Materials (plus TSA security threat assessment), Tank Vehicles, Doubles/Triples, and School Bus. Each test requires an 80% minimum score. Hawaii CDL applicants should also familiarize themselves with island-specific operational requirements covered in Hawaii DOT CDL supplements.

The FMCSA BAC limit of 0.04% applies to CDL drivers operating a CMV in Hawaii. Hawaii uses OVUII terminology (Operating a Vehicle Under the Influence of an Intoxicant) for all impaired driving offenses. A CDL driver who refuses a chemical test or tests at 0.04% or above is immediately placed out of service and faces CDL disqualification. The standard OVUII limit of 0.08% applies when the CDL holder is driving a personal (non-CMV) vehicle.

Hawaii's islands have no road connections between them. CDL drivers involved in inter-island cargo work at port facilities where vehicles and cargo are loaded onto cargo ships operated by Matson Navigation or Young Brothers. CDL drivers operate roll-on/roll-off vehicles and equipment at the port, following port authority safety procedures. A CMV registered on Oahu cannot be driven to Maui — it must be shipped. CDL drivers on each island can only operate their CMV on that island's road network.

Hawaii Island CDL drivers should continuously monitor Hawaii County Civil Defense alerts and Hawaii Emergency Management Agency (HI-EMA) notifications when active volcanic activity is occurring on the Big Island. If a lava flow road closure is issued, CDL drivers must comply immediately — do not attempt to cross or circumvent a closure barrier. Notify dispatch of the route change requirement. Document the delay in the driver's log (hours-of-service records allow for delays caused by emergency road closures). Use alternate routes as designated by Civil Defense.

A Class A CDL allows you to operate any combination of vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 lbs or more, provided the towed unit exceeds 10,000 lbs — this includes tractor-trailers and double/triple trailer rigs. A Class B CDL covers single vehicles with a GVWR of 26,001 lbs or more, or any such vehicle towing a unit not exceeding 10,000 lbs — this includes straight trucks and large buses. A Class C CDL is required for vehicles designed to carry 16 or more passengers (including the driver) or for vehicles transporting hazardous materials that require placarding, when those vehicles do not qualify for Class A or B.

CDL fees vary by state and by the class and endorsements you obtain. Most states charge separate fees for the CDL knowledge test ($10–$30 per attempt), the CDL skills test ($50–$150), and the CDL license itself ($50–$100). Additional fees apply for each endorsement (HazMat, Tanker, Passenger, etc.). The HazMat endorsement also requires a TSA security threat assessment fee of approximately $86. Check your Hawaii DMV website for current fee schedules.

Federal regulations (49 CFR 383.133) require that CDL applicants be able to read and speak the English language sufficiently to understand highway traffic signs and signals and to respond to official inquiries. Many states offer CDL knowledge tests in Spanish and other languages for non-commercial knowledge questions, but the actual CDL test must be taken in a language that allows the driver to meet the English proficiency requirement. Check with the Hawaii DMV for available language options.

In most states, a CDL is valid for 4–8 years (commonly 4–5 years). To renew your Hawaii CDL, you typically need to visit a DMV office, pass a vision test, pay the renewal fee, and update your medical certification (DOT physical). If you hold a HazMat endorsement, your TSA background check must also be current. CDLs cannot generally be renewed online due to federal requirements for in-person verification of medical certification.

If you fail the CDL General Knowledge test in Hawaii, you are typically required to wait a specified period (commonly 1–7 days) before retaking it. Most states allow 2–3 attempts before requiring additional waiting periods or study requirements. There is usually a retest fee for each attempt. Focus on the areas you missed — most states provide a score sheet showing which topic areas you need to review.