AMP: 0 Location: SR 377 and SR 277, Navajo Cty Reassurance shield at the beginning of 377, along, desolate road that basically just connects Heber to Holbrook and I-40 AMP: 0 Location: SR 377 and SR 277, Navajo Cty 33 miles to 77 and the end of SR 377, 37 miles to I-40 AMP: 14 … Continue reading State Route 377, SR 277 to SR 77