AMP: 2
Location: 6th Ave and Joyland Rd, Lewistown
Reassurance shield after S-237, still signing 87 and 200 as business routes.
AMP: 0
Location: US-191 and US-87, Fergus Cty
Shortly thereafter, on the east side of Lewistown, the business routes end as 87/191/200 merge back onto the main alignment.
W to US-191/MT-3, E to US-191/US-191 Bus
S to US-191/MT-3, N to US-191/US-191 Bus
N to US-87/US-191 Bus/MT-200, S to US-87/MT-3/MT-200
S to US-87/US-191 Bus/MT-200/MT-200 Bus/S-238
N to US-87/US-87 Bus/MT-200/MT-200 Bus/S-238
E to US-87/US-87 Bus/US-191 Bus/MT-200/S-238