AMP: 56 Location: Andy Devine Ave and I-40, Kingman SR 66 begins after I-40 and seems to exist mainly to serve Supai Junction and Indian 18 AMP: 56 Location: Andy Devine Ave and I-40, Kingman SR 66 is mostly signed as Historic US-66, and is one of the longer extant alignments from I-40 in Arizona … Continue reading State Route 66, I-40/I-40 Bus/US-93 to Yavapai CR 66