Commercial Driver Licensing and Class 1 Requirements
Alberta's commercial licensing system is built on classes and endorsements. A Class 1 licence covers tractor-trailers and any motor vehicle combination where the towed unit exceeds 4,600 kg, and it permits driving vehicles in Classes 2, 3, 4, and 5 as well. Candidates must be able to place each class: Class 2 covers buses, Class 3 covers single trucks over 11,000 kg (often with a trailer up to 4,600 kg), Class 4 covers taxis, ambulances, and small buses, and Class 5 is the ordinary passenger car. Endorsements add privileges on top of the base class; the air brake endorsement is the one most often tested because it is a prerequisite for operating any vehicle with an air brake system.
The traps are subtle. A question may describe a truck-and-trailer combination and ask whether Class 1 or Class 3 is required; the deciding fact is the weight of the towed unit, not the weight of the truck. Another common trap is assuming a higher class automatically includes a lower one without limit - it does, but endorsements are separate and are not inherited. Knowledge of medical fitness, driver abstracts, and the graduated licensing path is also fair game.
Rule of thumb: if the trailer weighs more than 4,600 kg, you need Class 1. If the trailer is 4,600 kg or less behind a heavy truck, Class 3 is usually sufficient. Worked example: a 12,000 kg straight truck towing a 5,000 kg trailer requires Class 1, because the towed unit exceeds 4,600 kg.