AMP: 215 Location: Humphreys St and Route 66, Flagstaff No reassurance shield after the split, but this is what it looks like. US-180 does something weird here- The mileposts actually increase from here to SR 64, contrary to the rest of what US-180 does. I have no idea why, but to read a milepost log, … Continue reading U.S. Route 180, I-40 Bus to SR 64