Business Loop I-90 - Billings

bl-090-w-billings — Older overheads with demountable copy at the Business Loop I-90 westbound turn from 1st Avenue N to Division Street south in Billings. These signs were replaced by 2013. 07/09/08

mt-003-n-at-bl-090 — Northbound MT 3 (27th Street) at Business Loop I-90 (Montana Avenue) east in Billings, Montana. Business Loop I-90 follows Old U.S. 10 along a couplet of Montana Avenue east and First Avenue N west through Downtown. 07/09/08

i-090-e-at-bl-090-billings — Business Loop I-90 splits from Interstate 90/U.S. 212 east to overtake old U.S. 10 along Laurel Road through west Billings. The pull through panel was replaced with a truck route sign for Exit 452, but the sign for Exit 446 remained as of 2015. Photo by Andy Bagley (01/00).

Comprising a multi-lane route for 7.0 miles, the Billings business loop angles northeast from an interchange complex (Exit 446) linking Interstate 90 with Mullowney Lane and Laurel Avenue. The route parallels Montana Rail Link (MRL) lines to a viaduct carrying traffic over the railroad and onto Montana Avenue. Business Loop I-90 runs along the north side of the MRL yard to Division Street, where it separates into a couplet using Montana Avenue east and 1st Avenue North west. The one-way pair intersect Montana 3 (27th Street) at Downtown Billings. The state highway leads northwest to Montana State University Billings and Billings Logan International Airport (BIL).

Remaining along old U.S. 10, the couplet of Business Loop I-90 recombines at North 18th Street along a five-lane section of 1st Avenue North. U.S. 87 ties into the route just west of the Yellowstone River, with the two highways spanning the river east to Interstate 90 at Exit 452. Traveler services cluster around the east and west ends of the route, while the central portion serves interests to Downtown. The business route remains well signed as of August 2016.

Updated August 1, 2026