A bill entitled the "Tandem Truck Amendments of 1983".

Amends the Surface Transportation Assistance Act of 1982 to direct the Secretary of Transportation to determine the standards and operating characteristics which are required to safely accommodate the lengths of truck tractor-semitrailer combinations on Interstate and primary highways. Requires each State to designate at least 90 percent of its Interstate highways and at least ten percent of its primary highways as qualified segments which can accommodate such trucks.