| State: | UT |
| Type: | BL |
| Route: | 84 |
| Spur Type: | I |
| Spur Of: | 84 |
| Length Mi: | 5.7354 |
| Direction A: | West |
| Terminus A: | in Tremonton |
| Junction: |
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| Direction B: | East |
| Terminus B: | in Elwood |
| Counties: | Box Elder |
Interstate 84 Business Loop (I-84 BL) is a 5.7354miles northern business loop off of I-84 in Box Elder County, Utah, that passes through Tremonton and Elwood. It is partially concurrent with I-15 BL and is the first business route along I-84 in the state.[1]
I-84 BL begins along Utah State Route 102 (SR-102) at a diamond interchange on I-84 (exit 40) in Tremonton. (I-84 heads west toward Snowville in Utah and then on to Twin Falls and Boise in Idaho. I-84 heads east to merge with I-15 and then continues on to Elwood.) From its western terminus, I-84 BL proceeds east along West Main Street, concurrent with SR-102, to pass under I-15 and then along the south edge of the Box Elder County Fairgrounds before reaching its junction with I-15 BL at 1000 West (Iowa String Road) on southeast corner of the fairgrounds. (I-15 BL heads north along North 100 West toward the Bear River Valley Hospital and I-15. Iowa String Road [South 1000 West] heads south toward Utah State Route 83 and Corinne.)
Continuing easta along West Main Street, I-84 BL runs concurrently with I-15 BL and SR-102 until it reaches Tremonton Street. At that intersection, the three routes transition from West Main Street to East Main Street. Next the three routes reach their junction with the southern end of Utah State Route 82 (North 300 East) at a T-intersection. (SR-82 heads north along North 300 East toward Garland.) Continuing east the three routes reach Haws Corner Junction (also known as Crossroads) at 1600 East and I-15 BL and I-84 BL turn south (right) to run along Utah State Route 13 (SR-13/South 1600 East) as they leave their concurrency with SR-102. (SR-13 heads north along North 5200 West toward Riverside and Plymouth and SR-102 continues east along West 11200 North toward Deweyville and Logan.)
Proceeding south the three routes (I-15 BL, I-84 BL, and SR-13) leave Tremonton (at about 400 South) and then enter Elwood about 3500feet later (at West 10400 North) and then reach the southern terminus of I-15 BL and the eastern terminus of I-84 BL at I-15/I-84 (exit 378) at another diamond interchange. (I-15 / I-84 heads north and west toward Tremonton, Riverside, and Snowville in Utah and then on to Malad City, Pocatello, and Twin Falls in Idaho. I-15 / I-84 heads south and east toward Honeyville, Brigham City, Ogden, and Salt Lake City. SR-13 continues south along North 5200 West toward Corrine.)
While fairly adequate signage previously existed along both I-15 BL and I-84 BL, by 2024, it was extremely limited.