AMP: 1 Location: Big Timber Loop Rd and 1st Ave, Big Timber No reassurance shield as the business loop splits from US 191. AMP: 3 Location: I-90 Business and I-90, Sweet Grass Cty A couple miles later, we’ll approach I-90 AMP: 3 Location: I-90 Business and I-90, Sweet Grass Cty Follow I-90 west to Butte … Continue reading Interstate 90 Business, US-191 to I-90