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Ontario AZ vs DZ License: A Brief Overview

Updated: Jun 17



To pursue a career as a truck driver in Ontario, one can opt for an upgrade to either a Class D license or Class A license. Before choosing a career path in Commercial Truck Driving, it is important to understand the difference between AZ vs DZ License in Ontario. Below, we outline the primary distinctions between these two licenses.



Ontario Class D License Explained

The Ontario Class D license is designed for drivers seeking to operate commercial vehicles, particularly those exceeding 11,000 kilograms (approx. 24,250 pounds) gross weight.

Towing a Trailer with a Class D License

In Ontario, a Class D license allows you to haul a trailer. The Class D license covers the operation of various commercial vehicles, including those designed for towing trailers. However, it's essential to be aware of the specific weight restrictions associated with the Class D license, as they dictate the maximum weight of the trailer that can be towed. As of January 2022, the maximum trailer gross weight cannot exceed 4,600 kilograms (approx. 10,140 pounds).

Class D Manual Transmission Restriction

There is no specific "manual" transmission restriction associated with the Class D license in Ontario. The Class D license typically covers a range of commercial vehicles, including those with manual transmissions.

Ontario Class A License Explained

You have likely heard about the highly sought-after "AZ License". This license, also known as the AZ License Ontario, is your ticket to operating the biggest vehicles in the trucking industry.


The Class A license in Ontario is the designation that authorizes individuals to operate the largest vehicles in the trucking industry. This license, denoted as "A," offers unrestricted flexibility, allowing drivers to transport any load above the restrictions of Class D License which is 11,000 kilograms (approx. 24,250 pounds) gross weight.

Towing a Trailer with Class A License

In Ontario, having a Class A license along with the requisite endorsements for equipment operation allows you to drive your tractor and trailer to their maximum allowed limit, whether within the province or state where the drive may occur.

Class A Manual Transmission Restriction

Possessing a Class A license signifies a higher level of responsibility, designating drivers as "Professional Drivers". It is imperative to hone manual transmission skills for a tractor-trailer under professional supervision. Demonstrating proficiency at the Drive Test center with an examiner allows drivers to upgrade to a Class A license with no manual restriction.


Manual transmission restriction is denoted by a 'G' condition on the Ontario Driver's License. Drivers holding a Class A license with a 'G' condition or a Class D license, can still operate vehicles with a manual transmission or a semi-tractor ("bob-tail").

Air Brake Certification / Z Endorsement

Securing the Air Brake Certification (Z) is vital for operating a vehicle with air brakes, a crucial skill applicable to various drivers, such as truck drivers, recreational vehicle operators, and other commercial vehicle operators. This qualification is not exclusive to those pursuing the Class A License, making it an essential credential regardless of your driving specialization, especially if you are embarking on a truck driving career path.


Obtaining the Z Endorsement is imperative for anyone looking to operate a vehicle equipped with air brakes.




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