I-15 South - Exits 193 and 192
I-15 south at Exit 193 - BL-15/Cedar St. Approaching Exit 192 - US-12/US-287 South/Townsend/Capital Area.
I-15 North - Exit 192
I-15 north at Exit 192 - BL-15/US-12/US-287/Townsend/Capitol Area. US-287 joins I-15 northbound.
US-12 East at I-15 South Onramp
US-12 east at I-15 south to Butte. US-287 joins US-12 eastbound here. This is the southern end of the I-15 Business Loop in Helena.
US-12 West/BL-15 South at I-15/US-287
US-12 West/BL-15 South (Prospect Ave.) at I-15. Turn right for I-15 south to Butte; stay right for I-15/US-287 North to Great Falls. Continue straight for US-12 East/US-287 South/Townsend. This is the southern end of the Helena business loop.
I-15 South - Exit 192 Offramp at US-12/US-287/BL-15
I-15 South - Exit 192 Offramp at US-12/US-287/BL-15. Merge right for US-12 West/Capitol Area (Prospect Ave.)