To amend title 23, United States Code, to require the random testing of applicants for drivers' licenses for the illegal use of controlled substances.

Directs the Secretary of Transportation not to approve any Federal aid highway project: (1) in any State which, within a specified two-year period, does not have in effect a program for random testing of driver's license and renewal applicants for the illegal use of controlled substances; and (2) for one year after such State has issued or renewed a driver's license to any individual who tests positive under its testing program.

Requires each State to: (1) annually certify to the Secretary that it has in effect such a program and is not issuing or renewing such driver's licenses; and (2) submit such information as the Secretary shall require to verify such certification. Directs the Secretary not to approve any project in any State which has failed to make such certification.