AMP: 43 Location: Lyndale Ave and Main St, Helena As Business Loop 15 joins, we’re told to stay straight to go to it for some reason, and then also stay straight for 12 east. AMP:43 Location: Lyndale Ave and Montana Ave, Helena A few blocks later, we’ll approach S-229 (again, for the business loop). Keep … Continue reading U.S. Route 12, I-15 Bus to S-229