The purpose of this legislation is to allow certain drivers under the age of 21 to operate commercial motor vehicles in interstate commerce. This is aimed at addressing the shortage of truck drivers in the transportation industry by providing younger drivers with more opportunities to gain experience and work in this field. The key provisions of the legislation include defining an "eligible driver" as someone who is at least 18 but under 21 years old and holds a commercial driver's license that is limited to intrastate operation.