Business Route 84 - Interstate Business Loop Guide
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Interstate Business Route 84

Interstate 84 has eight active business routes and two decommissioned business routes.

IDAHO
Caldwell-Nampa Active This business route follows U.S. 30, including the Blaine Street / Cleveland Boulevard one-way couplet, Caldwell Boulevard, and Garrity Boulevard between Exits 27 and 38.
Boise Decommissioned The Boise business route was decommissioned in the 1980s in favor of the Interstate 184 (formerly Interstate 180N) spur from the west and U.S. 20-26 (Broadway) from the east. This business route used to be routed between Exits 49 and 54 from Interstate 84.
Mountain Home Active This business route serves Mountain Home between Exits 90 and 99 and is co-signed with U.S. 30.
Hammett Active This business route follows old U.S. 26-30 through Hammett between Exits 112 and 114.
Glenns Ferry Active This business route follows old U.S. 26-30 through Glenns Ferry between Exits 120 and 121.
Bliss Active This business route follows U.S. 30 and U.S. 26 through Bliss between Exits 137 and 141.
Jerome

?

 This business route may serve Jerome, and if so, it is partially located on Idaho State Route 25.
Burley/Heyburn Active This business route follows U.S. 30 through Burley and Heyburn between Exits 208 and 211 via Idaho State Routes 27 and 24. It does not enter Rupert, however.

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UTAH
Tremonton Active Formerly part of U.S. 30S, this business route through Tremonton is partially cosigned with Business I-15. A rare dual business loop, this is both Business Loop I-15 and I-84. The routes split at the western edge of town, just as the parent Interstates do. U-102 continues on as a standalone route both east and west of the business loop. The eastern leg of the loop is part of U-13, giving the U-13 the distinction of hosting business loops in two different cities (the other being the loop in Brigham City).
Brigham City Active Dan Stober writes, "I was on a road trip on 11/21/98, and I stumbled across a marked Business Loop I-15/84 in Brigham City. There are consistent trailblazers all along the route; the problem is that it is not signed from the freeway in either direction (which is why I told you it doesn't exist). Basically, the route follows U-13 through town." This is the last western Interstate 84 business loop heading eastbound.
CONNECTICUT
Newtown Decommissioned According to Bob Bailin and Michael Summa, there used to be a Business Route I-84 in Newtown between what is now Exits 9 and 10. From exit 9, the route followed Connecticut State Route 25 south to join with U.S. 6 east to the Newtown business district (such as it is). It then hanged a left at the famous Newtown flagpole, following U.S. 6 east to join up with I-84 at exit 10. Bob believes the Business Loop I-84 designation was eliminated in the late 1970s after the former U.S. 6 expressway was fully upgraded to Interstate 84. Michael's recollection is a bit different from Bob's. Michael wrote, "As for BUS-SPUR 84 in CT, it was signed as such from exit 10 to the center of Newtown, at the flagpole, the junction of US 6/former US 202/CT 25. Along I-84 itself only one (auxiliary sign) in each direction, as a separate supplement to the regular guide exit signage, alerted motorists to this fact, and with a small button copy Bus-84 shield. Regular wooden green shields with the old specs were posted along this short stretch of the route itself along US 6. Now I am not sure if the relocation of US 202 had anything to do with the decommissioning of Bus-84. I can't be exact in what period this was other than the 1970s."

Page Updated April 27, 2005.