AMP: 340 Location: I-17 and I-40, Coconino Cty As I-17 begins and we head out of Flagstaff, we’re immediately informed of the SR 89A split AMP: 338 Location: I-17 and SR 89A, Coconino Cty 1/2 mile to the SR 89A split. Old 89A is visible to the right AMP: 337 Location: I-17 and SR 89A, … Continue reading State Route 89A, I-17/I-40 to I-17