In Ontario an AZ or DZ license is required to operate a ready-mixed concrete truck.
According to DriveTest from the Ontario Government (https://drivetest.ca/licences/drivers-licences-commercial.html):
- Class A: Any truck/tractor-trailer or combination of motor vehicle and towed vehicles where the towed vehicles exceed a total gross weight of 4,600 kilograms. Class A license holders may also drive vehicles in Classes D, G, and A with condition (R). A Class A license does not permit you to drive a bus carrying passengers, a motorcycle, or a moped.
- Class D: Any truck or motor vehicle combination exceeding 11,000 kg, provided the towed vehicle is not over 4,600 kg. Class D license holders may also drive a vehicle in Class G. A Class D license does not permit you to drive a bus carrying passengers, a motorcycle, or a moped.
- Z Endorsement: A Z air brake endorsement is required on a driver’s license to operate any air-brake-equipped motor vehicle. The Z endorsement can be combined with any of the class A, B, C, D, E, F, or G licenses.
