According to federal law, anyone what age or younger is prohibited from
driving on public roads as part of their job?

Explanation:

According to the Hazardous occupation No. 2 of FLSA of  the Department of Labour a minor under 18 years of age is prohibited from driving vehicles on public roads. He/ she is also prohibited from serving as an helper on such vehicles on highways and public roads. They cannot help in logging, mining or excavations and building tunnels.  The FLSA was amended by the congress in 1998 and the age was reduced to 17 for on the job driving on public roads. They are only allowed to drive under limited circumstances.

explanation:

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