Tolong jelaskan mengenai Oregon dari Jaringan Nasional

Note: Routes added to the Interstate System under 23 U.S.C. 139(c) are included only to the extent designated above.

No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.