AMP: 408 Location: I-90 and MT-78, Stillwater Cty Reassurance shield after the Columbus interchange AMP: 420 Location: I-90 and EB Rest Area, Stillwater Cty Reassurance shield after a rest area AMP: 426 Location: I-90 and Old Hwy 10, Stillwater Cty Reassurance shield after the Park City interchange AMP: 427 Location: I-90 and Old Hwy 10, … Continue reading Interstate 90, MT-78 to I-90 Bus