What age to drive a dumper truck on the road?

Answer 1

It depends on what jurisdiction you are in and where, exactly, the truck will be driven. In most North American jurisdictions you must be at least 18 years old to hold a Commercial Driver's License (which is what you will need to drive a dump truck on public roads), but you must be at least 21 years old to drive a commercial vehicle across state, provincial, or national borders.

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You can get an intrastate-only CDL in ALL states and territories of the United States. However, actually finding employment as a CDL driver at 18 is a bit unlikely, primarily due to insurance company policies.

One additional note to the above, it also depends on what class of vehicle it is. In the United States, a CDL is only required for a vehicle with a Gross Vehicle Weight Rating or Gross Combination Weight Rating of more than 26,000 lbs. in instances of vehicles which are operated on a for-hire basis. In most states which I'm aware of, a driver with a learner's permit is not restricted to certain weight classes, meaning they could (at least theoretically) operate a vehicle rated at up to 26,000 lbs., so long as they were supervised by a fully licenced driver meeting whatever the age requirement of that particular state was.