The class licence system is used in Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, the Northwestern Territories, Nunavut, Nova Scotia, Prince Edward Island, Quebec, Saskatchewan, and Yukon.

A Class 1 licence allows you to drive any type of motor vehicle, including semi-trailer trucks. A Class 2 licence allows you to operate buses as well as vehicles under classes 3, 4, and 5. With a class 3 licence, you can drive trucks with two or more axles (three or more axles in Alberta) and vehicles under class 5. Class 4 gives you licence to drive vehicles such as taxis, ambulances, and certain types of buses as well as Class 5 vehicles. The Class 5 licence allows you to drive a passenger vehicle. This is the kind of licence most non-commercial drivers get once they have passed the initial stages of licensing. Class 6 is a motorcycle cycle licence.

However, Ontario uses a different classification scheme for different kinds of driver’s licence. In Ontario, a G licence allows you to operate a passenger vehicle with no restrictions. New drivers go through the learner’s permit (G1) and probationary licence (G2) before they can obtain a G licence. Class A allows the driver to operate any tractor-trailer combination, as well as Class D and Class G vehicles. Class B is a licence to operate any type of school bus as well as Class C, D, E, F, and G vehicles. Class C allows the driver to operate any regular bus in addition to Class D, F, and G vehicles. Class D allows the holder to drive all trucks or combination as long as the towed vehicle weighs 4,600 kg or less. Vehicles under class G are also allowed. Class E restricts drivers to operating school buses with a maximum of 24 passengers, as well as Class F and Class G vehicles. Class F allows the holder to drive regular buses with a maximum capacity of 24 passengers, as well as ambulances and Class G vehicles and Class M is a motorcycle licence, which can also serve as the equivalent of a G1 licence.