The original highway from Casa Grande to Tucson entered the Old Pueblo via Miracle Mile, a road modeled after German Autobahns but without overpasses or an exclusive right of way.
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The design portrayed the new parkway leaving Interstate 10 north along 48th Street corridor, then angling across the Salt River to reach 44th Street where it was planned to end at Washington St. When it opened in 1978, it included the vital eastern access to Sky Harbor Airport, replacing the old 40th Street entrance that was eliminated when 40th Street was demolished to make way for a new airport terminal and runway expansions.
State Route 77 (or SR 77) is a state highway in Arizona that traverses much of the state's length, stretching from its northern terminus at the boundary of the Navajo Nation north of Holbrook to its junction with I-10 in Tucson.
The tribal headquarters, library and museum are in Parker, Arizona, about 40 miles (64 km) north of I-10.