AMP: 199 Location: I-15 and Lincoln Rd, Lewis and Clark Cty Reassurance shield after the Lincoln Rd interchange AMP: 193 Location: I-15 and Custer Ave, Helena As we enter Helena, we’ll approach I-15 Business AMP: 193 Location: I-15 and Cedar St, Helena Exit for I-15 Business. US 12 and the 287 split are coming up in a mile, … Continue reading U.S. Route 287, S-279/S-453 to I-15 Bus