AMP: 346
Location: US-20 and Bridge St, St Anthony
Reassurance shield after the St Anthony exit.
AMP: 347
Location: US-20 and US-20 Business, Fremont Cty
A mile or so later, turn left for the business loop back into St Anthony. Follow 20 to Ashton and W. Yellowstone, MT. The expressway more or less ends here.