AMP: 192 Location: I-15 and 11th Ave, Helena Less than a mile later, exit for US 12 west, US 12 east/US 287 south towards Townsend, and the unmarked business loop, which heads back north through Helena. S to S-518, N to S-279/S-453  S to S-282/S-518, N to S-279/S-453  S to S-282/S-518,  N to I-15 Bus … Continue reading U.S. Route 287, I-15 Bus to I-15/I-15 Bus/US-12