AMP: 1 Location: I-115 and Montana St, Butte After the turn, I-115 begins. Stay straight for 115 west to I-15/I-90. AMP: 0 Location: I-115 and Excelsior Ave, Butte Reassurance shield after the Excelsior Ave interchange. 115 does not interchange with 90 east/15 north. AMP: 0 Location: I-115 and I-15, Butte Several hundred feet later, we’ll merge onto I-15/I-90 … Continue reading Interstate 15 Business, I-115 to I-15/I-90/I-115/I-90 Bus