AMP: 279 Location: I-15 and I-315, Great Falls Reassurance shield after the 315 interchange as US 89 and Montana 200 join the interstate. AMP: 279 Location: I-15 and Central Ave W, Great Falls Junction I-15 Business south coming up in 3/4 mile. In this case, it’s signed as TO US-87 NORTH for convenience AMP: 280 Location: I-15 and … Continue reading Montana Highway 200, I-15/I-315/I-15 Bus/MT-3 to I-15 Bus