AMP: 310 Location: US-20 and Lewisville Hwy, Bonneville Cty After the loop rejoins, stay straight to stay on the I-15 detour. AMP: 310 Location: I-15 and Lewisville Hwy, Bonneville Cty Reassurance shield after the 20 Business interchange. AMP: 311 Location: US-20 and St Leon Rd, Bonneville Cty Stay straight for detour I-15 at the St Leon Rd interchange. … Continue reading U.S. Route 20, US-20 Bus to SH-43