Science Fair Project Encyclopedia
Commercial driver's license
A commercial driver's license (sometimes shortened to "CDL") is required in the U.S. to operate many types of heavy-duty vehicles including (but not limited to) tow trucks, tractor trailers and busses. The criterion for such licenses vary from state to state.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details


