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Commercial Driver License

Idaho CDL Classes Explained

Which Idaho CDL class you need depends on vehicle weight, what it tows, and the type of operation, not just the truck size. The three classes are set by federal rule (49 CFR 383.91) and are the same in every state, so a Idaho CDL is valid nationwide. Idaho Transportation Department issues the license and runs the knowledge and skills tests. Idaho's agricultural economy relies on flatbed and reefer operators to move produce and bulk commodities to regional markets.

A Class A Tractor-trailers & combinations › B Class B Straight trucks & heavy buses › C Class C Passenger, school bus & HazMat
A
Highest Authority

Class A CDL

🚛 GCWR 26,001 lbs+ with towed unit over 10,000 lbs
Most Common

A Class A CDL is generally used for combination vehicles, including tractor-trailers, when the gross combination weight rating is 26,001 pounds or more and the towed unit is over 10,000 pounds.

Knowledge Test Topics

  • General Knowledge
  • Air Brakes if equipped
  • Combination Vehicles
  • Vehicle Inspection
  • Basic Vehicle Control
  • Road Test

Common Job Types

  • Tractor-trailer driver
  • Regional freight driver
  • Heavy combination vehicle operator
  • Class A delivery driver

Class A CDL in Idaho

Class A is the license behind most of Idaho's long-haul and heavy freight, much of it moving on I-84, I-86, I-15. With agriculture and potato processing, lumber and forest products, mining equipment driving demand, typical Idaho Class A work includes:

  • Agriculture and potato processing: refrigerated (reefer) loads of produce and food moving to distribution centers and out of state
  • Lumber and forest products: flatbed and step-deck loads of steel, lumber, and building materials
  • Mining equipment: bulk end-dumps, belly-dump hoppers, and heavy-haul equipment moves for the mines
  • Food manufacturing: regional and over-the-road distribution runs for grocery, retail, and e-commerce freight

Apply, test, and schedule through Idaho Transportation Department. Not sure this is your class? Use the Idaho CDL Selector.

Study for Idaho Class A CDL → Find My CDL Class
B
Single Heavy Vehicle

Class B CDL

🚚 GVWR 26,001 lbs+, limited towing

A Class B CDL is generally used for a single commercial motor vehicle with a gross vehicle weight rating of 26,001 pounds or more, plus limited towing.

Knowledge Test Topics

  • General Knowledge
  • Air Brakes if equipped
  • Vehicle Inspection
  • Basic Vehicle Control
  • Road Test

Common Job Types

  • Straight truck driver
  • Dump truck driver
  • Large bus driver
  • Box truck driver
  • Concrete mixer driver

Class B CDL in Idaho

Class B covers the single heavy vehicles that keep Idaho moving locally: no tractor-trailer, but everything from dump trucks to full-size buses. Typical Idaho Class B work includes:

  • Agriculture and potato processing: single-unit farm and packing-house trucks (many states offer a restricted farm CDL)
  • Lumber and forest products: dump trucks, concrete mixers, and boom trucks on construction sites
  • Mining equipment: on-road dump trucks and water trucks around mine and quarry sites
  • Food manufacturing: local delivery straight trucks and last-mile box trucks

Apply, test, and schedule through Idaho Transportation Department. Not sure this is your class? Use the Idaho CDL Selector.

Study for Idaho Class B CDL → Find My CDL Class
C
Passenger, School Bus & HazMat

Class C CDL

🚌 Below Class A/B threshold, special operation

A Class C CDL may apply when the vehicle does not meet Class A or B weight definitions but is used for passengers, school bus operation, or placarded hazardous materials.

Knowledge Test Topics

  • General Knowledge as required
  • Passenger or School Bus endorsement if applicable
  • HazMat endorsement if applicable
  • State-specific requirements

Common Job Types

  • Shuttle driver
  • Small passenger vehicle driver
  • School activity driver
  • HazMat delivery driver

Class C CDL in Idaho

Class C applies to lighter vehicles in Idaho that still need a CDL because of what they carry: 16 or more passengers, or placarded hazardous materials. Typical Idaho Class C work includes:

  • Agriculture and potato processing: farm crew transport when the vehicle carries 16 or more passengers
  • Mining equipment: crew and shift-change buses (P endorsement) and light HazMat runs to the sites
  • Food manufacturing: light HazMat delivery routes when the load requires placards
  • Smaller school buses and activity buses for Idaho school districts (P and S endorsements)

Apply, test, and schedule through Idaho Transportation Department. Not sure this is your class? Use the Idaho CDL Selector.

Study for Idaho Class C CDL → Find My CDL Class

Not sure which class applies to you?

Answer a few questions about your vehicle and operation, and the CDL Selector gives you a starting point in under a minute.

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