Business Loop I-15 - Brigham City

US 89/91 south at Business Loop I-15/84 — U.S. 89/91 overlap 25 miles from Logan City, Utah at the south end of SR 13 and the turn of Business Loop I-15/84 west from Main Street onto U.S. 91 in Brigham City. Photo by Dan Stober (03/15/01).

As first reported by Dan Stober on November 21, 1998, the Brigham City business route for I-15/84 consists of a 7.7 mile long loop east through the Box Elder County seat. The south leg of the route follows U.S. 91 from a diverging diamond interchange (Exit 362) completed in July 2014 east to U.S. 89 and SR 13 at Main Street. SR 13 (Main Street) leads the route north through the city center to SR 38, where the pair turn west to I-15/84 at Exit 365.

Business Loop I-15/84 run concurrent throughout the alignment, with shields posted along Main Street, at the junction of U.S. 89 and U.S. 91 and on the southbound off-ramp to SR 13. These were noted in July 2016. Mainline signs from I-15 and I-84 omit the business routes and instead display U.S. 91 at the south end and SR 13 at the north end.

Updated July 31, 2026