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Hace 15 horas · Highway shields for Interstate 80, Business Loop Interstate 80, and the Eisenhower Interstate System Primary Interstate Highways in the 48 contiguous states. Alaska, Hawaii, and Puerto Rico also have Interstate Highways. System information Length 48,756 mi [a] (78,465 km) Formed June 29, 1956 ; 67 years ago (1956-06-29) Highway names Interstates Interstate X (I-X) System links Interstate ...
