AMP: 279 Location: I-15 and I-315, Great Falls In a mile, we will approach the 89/200 split, which is also unsigned I-315, Montana 3, and the I-15 business loop rejoining. AMP: 278 Location: I-15 and I-315, Great Falls Exit in 1/4 mile for US 89 and Montana 3 south, I-15 Business north, I-315 east, and … Continue reading Interstate 15, I-15 Bus to I-315/I-15 Bus/US-89/MT-3/MT-200