AMP: 128
Location: I-15 and Harrison Ave, Butte
As 15 and 90 join, their twin business loops will prepare to split to head into Butte.
AMP: 127
Location: I-15 and Harrison Ave, Butte
Exit for I-15 and I-90 Business, which head over to uptown Butte and join I-15/I-90 again in a few miles. Montana 2 also begins here, and heads east on old US 10 all the way to Three Forks.
S to I-115/I-15 Bus/I-90 Bus, N to MT-69
E to MT-55/S-399, W to I-115/I-15 Bus/I-90 Bus
E to MT-55/S-399, W to I-15 Bus/I-90 Bus/MT-2