AMP: 65 Location: US 87 and US 191, Fergus Cty Reassurance shield as US 191 joins the highway and MT 3 departs. The wrong way concurrency lasts to Lewistown. AMP: 79 Location: US 87  and D St, Fergus Cty Fourteen miles later, keep left to stay on 87/191/200 AMP: 79 Location: US 87 and D St, Fergus Cty … Continue reading U.S. Route 191, US-87/MT-3/MT-200 to US-87 Bus/US-191 Bus/MT-200 Bus