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Interstate Business Route 90

Interstate 90 has 38 active business loops and spurs.

WASHINGTON
North Bend Not a Business Loop According to Robert V. Droz, there is an Interstate 90 shield in North Bend (just east of the Seattle metro area) with an "Old" banner attached to it. I-90 signs started appearing around 1962 or so, maybe earlier, on what was then U.S.10 though town. U.S.10 was truncated at Spokane in 1969, leaving I-90 shields in North Bend along old U.S. 10. Around 1979 or so, the Interstate 90 freeway was built, and in lieu of posting a Business Loop in town, an "OLD" banner was affixed above the Interstate shield.
Cle Elum Decommissioned From Exit 84 to Exit 85 via old U.S. 10 and Washington State Route 970. As of June 1999, there was at least one Business Loop I-90 shield still posted in Cle Elum. It could not be found in August 2006.
Ellensburg Decommissioned Exit 106 to Exit 109 via old U.S. 10 and old U.S. 97. Business Loop I-90 is well-posted thru town but there are no signs at the I-90 exits. This business loop was field-checked by Mark Bozanich in May 1999. These signs were gone by August 2006.
Moses Lake Active Exit 176 to Exit 179 via old U.S. 10, parts of which are also WA 171 and 17. As of May 1999, Business Loop I-90 is signed on Eastbound I-90 at Exit 176, signed thru town in both directions, but not signed at Exit 179 on Westbound I-90. These signs were still in place in August 2006.
Ritzville Decommissioned/Signs Remain Exit 220 to Exit 226 via old US 10-395. There are no signs on Interstate 90 at Exits 220 or 226, signed well inside Ritzville, not as well in Adams County east of Ritzville. This business loop was field-checked by Mark Bozanich in May 1999; he returned to photograph it in 2000.
Spokane Decommissioned/Signs Remain Exit 276 to Exit 294 via old U.S. 10. Portions of old U.S. 2, U.S. 195, and U.S. 395 ran coincidental with parts of old U.S. 10 in Spokane area. Signed on both Eastbound I-90 at Exit 276 and U.S. 2 Eastbound at Sunset Highway - Spokane Airport interchange. Sign on I-90 Westbound at Exit 294 used to say "Sprague Ave. Business Route" but does not have Business Loop I-90 shield. Shields were well posted in City of Spokane until the early 2000s; they were posted poorly in Spokane County. Mark Bozanich writes, "For the most part, business routes in Washington State are not part of the state highway system. It is harder for the state to get counties and cities to cooperate in posting signs along business routes than to post signs that are on state highways. In the Spokane area, Business Loop I-90 is well-posted inside the city but not in the county. Entering Spokane from the west, Business Loop I-90 is posted from both I-90/U.S. 395 and U.S. 2. From the east, the traditional business route is posted at the Interstate 90 exit as the Sprague Avenue Business Route. Spokane County not only does not do a good job of posting Business Loop 90 signs along East Sprague Ave, it also avoids posting trailblazer signs to Interstate 90 from those north-south arterials that cross Sprague and interchange with Interstate 90. There are several trailblazer signs to Interstate 5 and/or Interstate 90 on county and city arterials in the Seattle-Tacoma area. One last comment on business routes in Washington State is that the DOT regional traffic engineers all seem to handle business routes differently."

Site Navigation
Interstate Shield Main Page
Business Route Guide
Official Federal Highway Administration Interstate Route Log and Finder List
Three-Digit Interstates (3dis) at Kurumi.com
IDAHO
Post Falls Active The Business Loop starts at the second Idaho exit and heads north to old U.S. 10, following old U.S. 10 east to the east end of town between Exits 5 (Spokane Street) and 6 (Seltice Way). Business Loop I-90 rejoins I-90 one interchange west of the Idaho State Route 41 interchange. The eastern Business Loop I-90 interchange is most likely a half-diamond.
Coeur d'Alene Uncertain (Active) Business Loop I-90 serves Coeur d'Alene via old U.S. 10 via Northwest Boulevard and Sherman Avenue between Exits 11 and 15. Zach Maillard writes, "Take the Northwest Blvd. exit, and follow the Bus. Loop through town. The downtown area will remind you a little of Sun Valley, or Vail, or any other resort community. The Bus. Loop takes you around the lake, through downtown, and past the resort before joining I-90, where it appears the road will smack into the mountain. For those of you coming from Montana, then Coeur d'Alene will seem like Los Angeles." Several business loop shields were removed from the older button copy signs from Interstate 90, however, new reflective signs placed at the western interchange (Exit 11) again feature the business loop. There are no shields for the loop through town, including the unusual U.S. 95 interchange southwest of downtown. The loop no longer appears on the official Idaho state map (as of 2006).
Kellogg Uncertain (Active) This business loop serves Kellogg via old U.S. 10 between Exit 49 (Bunker Avenue) and Exit 51 (Division Street). A visit in 2006 revealed that several business shields were removed from signs along Interstate 90. It is uncertain if this loop still exists or not.
Silverton - Osburn Active Business Loop I-90 serves the towns of Silverton and Osburn along old U.S. 10 between Exits 57 and 60.
Wallace Active This Business Loop I-90 serves Wallace via old U.S. 10 between Exits 61 and 62. For a long time, the business loop carried Temporary Interstate 90, with a traffic signal to halt cross-country travelers. This "last stop light" was bypassed in 1991, when the new freeway was built around and over historic Wallace.
Mullan Active This business route serves old U.S. 10 betwen Exits 68 and 69.
MONTANA
Alberton Active This business route follows Montana Secondary 507 (old U.S. 10) through Alberton between Exits 75 and 77.
Missoula Active This business route follows Broadway Street (old U.S. 10), with a short jog into the downtown area and University of Montana via Duncan Drive, the Fifth and Sixth Avenue one-way couplet, and Higgins Avenue. It is also variously cosigned with U.S. 12 and Montana 200.
Deer Lodge Active Business Loop I-90 serves Deer Lodge between Exits 184 and 187 via Montana State Route 275 and Old U.S. 10.
Butte Active The Butte business loop follows the route of Interstate 115 and old U.S. 10-91. Business Loop I-90 is cosigned with Business Loop I-15 between Interstate 15-90 Exits 124 and 127 (Harrison Avenue/Montana State Route 2 Interchange).
Bozeman Active Business Loop I-90 serves Bozeman via old U.S. 10 between Exit 305 (North 19th Avenue) and Exit 309 (Main Street).
Livingston Active Business Loop I-90 serves Livingston via old U.S. 10 between Exits 333 and 337.
Big Timber Active Business Loop I-90 serves Big Timber via old U.S. 10 between Exits 367 and 370.
Laurel Active This business route follows old U.S. 10 between Exits 433 and 437. U.S. 310 ends on the business loop in downtown Laurel.
Billings Active The Billings business loop follows Montana Avenue (and Sixth Avenue through one-way section) between Exits 446 and 452. Very traditional business loop with fast food, motels, and businesses on either end, and the downtown area in the middle.
Hardin Active Business Loop I-90 serves Hardin between exits 495 and 497 via old U.S. 87 and Third Street.
WYOMING
Sheridan Active Business Loop I-90 serves Sheridan between Exits 20 and 25. Following standard Wyoming practice, the business route is as Business U.S. 14-87. The loop follows Coffeen Avenue and Main Street through town. Click here for more information including mileage.
Buffalo Active This business loop is cosigned as Business U.S. 87 (west half) and U.S. 16 (east half). Connects to northern end of Business Spur I-25 in downtown Buffalo. Click here for more information including mileage.
Gillette Active Business Loop I-90 serves Gillette via Second Street between Exits 124 and 128 along U.S. 14, U.S. 16, and Wyoming 59. Click here for more information including mileage.
Moorcroft Active Business Loop I-90 follows U.S. 14 and 16 through Moorcroft. Brad Schwartze reports that the loop is not signed from the freeway, but shields are present along the loop itself. Click here for more information including mileage.
Sundance Active Cosigned as Business U.S. 14 between Exits 185 and 191. Click here for more information including mileage.
SOUTH DAKOTA
Spearfish Active The Spearfish Business Loop begins at Exit 10 and reconnects to the freeway at Exit 14 via old U.S. 14. The northwestern half follows U.S. 85, and the southeastern half follows Alternate U.S. 14. Many thanks to Brad Schwartze for telling us of our accidental omission of this loop! Click here for more information.
Sturgis Active Business Loop I-90 serves Sturgis (and its annual bike rally) via old U.S. 14 between Exits 30 and 32. This may be cosigned partially with South Dakota 79. Click here for more information.
Rapid City Active In Rapid City, Business Loop I-90 follows South Dakota 79 from Exit 51 southeast into Rapid City, South Dakota 44 through downtown, and Truck U.S. 16 east of downtown to Exit 60. The business route is also old U.S. 14 via Sturgis Road, Main Street, and North Street. The truck route/eastern business loop connects Interstate 90 with South Dakota 79/Heartland Expressway. For some reason, Rand McNally, Mapquest, and the South Dakota State Official Map stopped showing the business loop their Rapid City maps starting in the late 1990s. However, the loop is still signed in the field (verified in September 2004). Click here for more information.
Wall Active This business loop follows old U.S. 14-16 between Exit 109 and Exit 110.
Kadoka Active This business loop connects to Interstate 90 between Exit 150 and Exit 152. A portion of the route is also signed as South Dakota 73.
Belvidere Active This business spur departs Interstate 90 at Exit 163 and connects to the town of Belvidere.
Murdo Active This business loop serves Murdo between Exits 191 and 192. Exit 192 is the junction with U.S. 83, so part of the loop is on U.S. 83.
Vivian Active This business loop serves Vivian between Exits 212 and 214.
Presho Active This business loop serves Presho between Exits 225 and 226 via Old U.S. 16.
Oacoma/Chamberlain Active Between Exits 260 and 265, Business Loop I-90 follows Old U.S. 16 and a section of South Dakota 50 through Oacoma and Chamberlain. An old bridge carries old U.S. 16 and the business route over Missouri River independent of the freeway.
White Lake Active This business spur (referred to as Business Spur I-90P on Chris Geelhart's page) departs Interstate 90 at Exit 163 and connects to the town of Belvidere.
Plankinton Active This business loop connects with Interstate 90 at Exit 308 and Exit 310, following Old U.S. 16. The route is partially signed with U.S. 281 and South Dakota 258. When South Dakota signs its business loops, it mentions the business loop on the first exit only. The second exit (the business loop return to the Interstate) does not get signed. In the case of Plankinton, you'd see "Exit 310 Business Loop I-90, Plankinton" first, then "Exit 312 Next Right" the second time. If you're headed eastbound, you'd see "Exit 312 Business Loop I-90, Plankinton" first, then "Exit 310 Next Right" the second time. There are no control cities on the second sign, making South Dakota's signing unique. By comparison, the Arizona DOT normally signs both business loop exits in both directions.
Mitchell Active This business route is old U.S. 16 through Mitchell. You'll have to drive a few blocks north of Business Loop I-90 to see the famous Corn Palace, a converted high school gymnasium.
Sioux Falls Active Business Spur from I-90 (Exit 399) south into downtown Sioux Falls via South Dakota State Route 115 (Cliff Avenue and North Drive). Business Spur I-90 ends at 10th/11th Streets, the same intersection where Business Spur I-29 ends and Business Loop I-229 makes a 90 degree turn from north to east (or south to west). South Dakota State Route 115 shares pavement with Business Spur I-90 between Interstate 90 and downtown and with Business Loop I-229 between downtown and Interstate 229. I'd like to see the signing of this intersection in downtown Sioux Falls. Thanks to Chris Geelhart and Ed Wilson for their clarification of the Sioux Falls business connections.
MINNESOTA
Worthington Active This business loop was discovered by Jay Maynard in November 2005. It follows Nobles County Route 25 (former Minnesota 266) to Nobles County Route 35 (Oxford Road), then follows Oxford Road as it becomes U.S. 59. The loop returns to Interstate 90 via Minnesota 60.
Fairmont Active The Fairmont route is co-marked with two county routes, as well as with Minnesota Trunk Highway 15 on the east end.
Austin Active This business route is old U.S. 16, and it is partially cosigned with U.S. 218. The Austin business route follows Minnesota Trunk Highway 105 in part, but was for a few years designated Minnesota Trunk Highway 116 before being turned back to the city and designated Business Loop I-90. The street names are Oakland Ave and Oakland Place NE. This is the last business connection for eastbound Interstate 90.

Page Updated September 4, 2006.