trailer. Specialized trailers for oversized loads can be considerably longer. Commercial operation of a Class 8 vehicle in the United States requires either a Class-B CDL for non-combination vehicles, or a Class-A CDL for combination vehicles (tractor-trailers). Industries that generally use Class 8 trucks are long-distance freight transportation, construction, and heavy equipment moving.

Canada

Vehicle classifications vary among provinces in Canada, due to "differences in size and weight regulations, economic activity, physical

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