AMP: 446
Location: I-90 and Billings Blvd, Billings
Just after the business loop, the control city switches to Sheridan and Billings Blvd prepares to split.
AMP: 447
Location: I-90 and Billings Blvd, Billings
Exit for South Billings Blvd. Billings Blvd is also S-416, which connects to S-418 which heads to Pryor.