It's all about the proper paper work. You can take a stock RAM 3500 and it would be treated pretty much as a semi truck and you wouldn't be allowed to exceed 10

It's all about the proper paper work. You can take a stock RAM 3500 and it would be treated pretty much as a semi truck and you wouldn't be allowed to exceed 100kmh with it. (And you would need a special driver's license). But then you can take the same truck and change the papers so you limit its max total weight to 3.5 tons and you can drive as fast as you want with your normal driver's license.