AMP: 118 Location: I-15 and Broadway St, Idaho Falls Just as US-20 joins the interstate, it will leave. Exit for 20 west towards Arco and I-15 Business into town. US-20 Business east also exits, and that will head into downtown too.  S to I-15 Bus/US-26, N to SH-48  E to US-20 Bus, W to US-26  S to … Continue reading Interstate 15, US-20 to I-15 Bus/US-20/US-20 Bus