AMP: 91 Location: SR 79 and SR 77, Pinal Cty Reassurance shield at the beginning of SR 79, a back road from Tucson to the East Valley AMP: 106 Location: Pinal Pioneer Pkwy and Martin Rd, Pinal Cty Reassurance shield after Martin Rd as we pass through a desert forest along the Pinal Pioneer Pkwy, … Continue reading State Route 79, SR 77 to SR 79 Bus