AMP: 138 Location: I-94 and Haynes Ave, Miles City Reassurance shield after the 59 interchange. AMP: 140 Location: I-94 and US-12, Custer Cty In a mile, exit for US 12 east towards Baker. I-94 business will rejoin the interstate here as well, and head back into Miles City.  E to S-320, W to I-94 Bus … Continue reading U.S. Route 12, MT-59 to I-94/I-94 Bus