AMP: 42 Location: US 91 and I-15, Bannock Cty Reassurance shield as US 91 splits from I-15 to head into the Cache Valley, leaving the I-15 corridor for the only time in its current, abbreviated existence. AMP: 41 Location: US 91 and Spring St, Virginia, Bannock Cty A mile or so later, we’ll enter the … Continue reading U.S. Route 91, I-15 to SH-40