List of business routes of the Interstate Highway System
The Interstate Highway System of the United States, in addition to being a network of freeways, also includes a number of Business Routes assigned by the American Association of State Highway and Transportation Officials. These routes connect a central or commercial district of a city or town with an Interstate bypass, and are signed with green shields resembling the Interstate Highway shield. The word BUSINESS is used instead of INTERSTATE, and, above the number, where the state name is sometimes included, the word LOOP or SPUR appears. A business loop has both ends as its "parent", while a business spur has a "dangling end", sometimes running from the end of the Interstate to the downtown area.
Dwight D. Eisenhower National System of Interstate and Defense Highways | |
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![]() ![]() Highway shields for Business Loop Interstate 24 and Business Spur Interstate 196 | |
![]() Interstate Highways in the 48 contiguous states | |
System information | |
Formed | June 29, 1956[1] |
Highway names | |
Interstates | Interstate nn (I-nn) |
Business Loop: | Business Loop Interstate nn (BL I-nn) Interstate nn Business Loop (I-nn Bus. or I-nn BL) |
Business Spur: | Business Spur Interstate nn (BS I-nn) Interstate nn Business Spur (I-nn Bus. or I-nn BS) |
System links | |
As the main purpose of a Business Interstate is to serve a downtown area, it is typically routed on surface roads. Thus Business Interstates don’t have to meet Interstate Highway standards. AASHTO does, however, apply similar standards as to new U.S. Routes, requiring a new Business Interstate to meet certain design standards.[2] Business Interstates are also sometimes routed onto freeways that were once designated as mainline Interstates themselves (such as the now-decommissioned Interstate 40 Business in Winston-Salem, North Carolina, and the existing Interstate 80 Business in Sacramento, California).
Business Interstates are most often posted in the western states, across the Great Plains and in Michigan. Eastern states generally did not designate business routes, as most of the Interstates paralleled the original U.S. routes instead of directly replacing them. With the exception of mountainous areas, this left most of the U.S. highways in place, or as co-signed routes with the parent Interstate, while the former routes were redesignated as local or frontage roads. In contrast, construction of the Interstate system in the western states often directly overlaid the old U.S. highway, leaving the former road impassable or as a disconnected route. Exceptions were at cities and towns, where the freeway would shift onto a bypass around them. This often left extant segments of old U.S. Highways in place, with a business route designation applied to them as a motorist aid to and from a business district of collection of motorists services.
Like auxiliary Interstate Highways, business Interstates can be repeated from state to state along their route. However, unlike auxiliary Interstate Highways, business Interstates can also be repeated in several locations within the same state.
Contents: | I-5 I-205 I-8 I-10 I-15 I-16 I-20 I-24 I-25 I-26 I-27 I-29 I-229 I-30 I-35 I-40 I-44 I-45 I-55 I-59 I-64 I-65 I-66 I-69 I-70 I-71 I-72 I-74 I-75 I-375 I-376 I-77 I-78 I-79 I-80 I-81 I-82 I-83 I-84(E) I-84(W) I-85 I-385 I-585 I-86 I-87 I-89 I-90 I-94 I-95 I-495 I-96 I-196 I-496 I-696 |
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List
Defunct routes are listed in italics.
Interstate 5
- I-5 Bus.—San Ysidro, National City and San Diego, California
- I-5 Bus.—San Diego, California
- I-5 Bus.—Solana Beach, California
- I-5 Bus.—San Clemente, California
- I-5 Bus.—Los Angeles, California
- I-5 Bus.—Woodland, California
- I-5 Bus.—Arbuckle, California
- I-5 Bus.—Williams and Maxwell, California
- I-5 Bus.—Willows and Orland, California
- I-5 Bus.—Red Bluff, California
- I-5 Bus.—Cottonwood, California
- I-5 Bus.—Anderson and Redding, California
- I-5 Bus.—Dunsmuir, California
- I-5 Bus.—Mount Shasta, California
- I-5 Bus.—Weed, California
- I-5 Bus.—Gazelle, California
- I-5 Bus.—Yreka, California
- I-5 Bus.—Vancouver, Washington
- I-5 Bus.—Castle Rock, Washington
- I-5 Bus.—Chehalis and Centralia, Washington
- I-5 Bus.—Olympia, Washington
- I-5 Bus.—Everett, Washington
- I-5 Bus.—Marysville, Washington
- I-5 Bus.—Bellingham, Washington
Interstate 205
- I-205 Bus.—Tracy, California
Interstate 8
- I-8 Bus.—San Diego, California
- I-8 Bus.—El Cajon, California
- I-8 Bus.—Alpine, California
- I-8 Bus.—El Centro, California
- State Bus. Route 8 (1)—Winterhaven, California and Yuma, Arizona
- State Bus. Route 8 (3)—Gila Bend, Arizona
Interstate 10
- I-10 Bus.—Ontario, California
- I-10 Bus.—Colton, California
- I-10 Bus.—Indio, California
- I-10 Bus.—Blythe, California
- State Bus. Route 10 (1)—Quartzsite, Arizona
- State Bus. Route 10—Phoenix, Arizona
- State Bus. Route 10—Casa Grande, Arizona
- State Bus. Route 10 (2)—Tucson, Arizona
- State Bus. Route 10 (3)—Benson, Arizona
- State Bus. Route 10 Spur—Benson, Arizona
- State Bus. Route 10 (4)—Willcox, Arizona
- State Bus. Route 10 (5)—Bowie, Arizona
- State Bus. Route 10 (6)—San Simon, Arizona
- Bus. Loop 21—Lordsburg, New Mexico
- Bus. Loop 22—Deming, New Mexico
- Bus. Loop—Las Cruces, New Mexico
- Bus. I-10-C—Sierra Blanca, Texas
- Bus. I-10-D—Van Horn, Texas
- Bus. I-10-F—Balmorhea, Texas
- Bus. I-10-G—Fort Stockton, Texas
Interstate 15
- I-15 Bus.—Escondido, California
- I-15 Bus.—Victorville, California
- I-15 Bus.—Barstow, California
- I-15 Bus.—Mesquite, Nevada
- I-15 Bus.- St. George, Utah
- I-15 Bus.—Cedar City, Utah
- I-15 Bus.—Parowan, Utah
- I-15 Bus.—Beaver, Utah
- I-15 Bus.—Fillmore, Utah
- I-15 Bus.—Holden, Utah
- I-15 Bus.—Nephi, Utah
- I-15 Bus.—Layton, Utah
- I-15 Bus.—Brigham City, Utah
- I-15 Bus.—Tremonton, Utah
- I-15 Bus.—Pocatello, Idaho
- I-15 Bus.—Idaho Falls, Idaho
- I-15 Bus.—Butte, Montana
- I-15 Bus.—Helena, Montana
- I-15 Bus.—Great Falls, Montana
- I-15 Bus.—Conrad, Montana
- I-15 Bus.—Shelby, Montana
Interstate 17
- State Bus. Route 17—Black Canyon City, Arizona
Interstate 19
- State Bus. Route 19 (1)—Nogales, Arizona
- State Bus. Route 19 (2)—Sahuarita, Arizona – Tucson, Arizona (Still shown on all Rand McNally road atlases.)
Interstate 20
- Bus. I-20-B—Pecos, Barstow, Texas
- Bus. I-20-D—Monahans, Texas
- Bus. I-20-E—Odessa, Midland, Texas
- Bus. I-20-F—Stanton, Texas
- Bus. I-20-G—Big Spring, Texas
- Bus. I-20-H—Westbrook, Texas
- Bus. I-20-J—Colorado City, Texas
- Bus. I-20-K—Loraine, Texas
- Bus. I-20-L—Roscoe, Texas
- Bus. I-20-M—Sweetwater, Texas
- Bus. I-20-N—Trent, Texas
- Bus. I-20-P—Merkel, Texas
- Business I-20-Q—Tye, Texas
- Bus. I-20-R—Abilene, Texas
- Bus. I-20-T—Baird, Texas
- I-20 Bus. Spur—Florence, South Carolina
Interstate 24
- I-24 Bus.—Paducah, Kentucky
- Downtown Loop ¹—Paducah, Kentucky
¹ Downtown Loop I-24 in Paducah, Kentucky was changed to Business Loop I-24 in 2002.
Interstate 25
- Bus. Loop (11)—Williamsburg, New Mexico – Truth or Consequences, New Mexico
- Bus. Loop (12)—Socorro, New Mexico
- Bus. Loop (13)—Belen, New Mexico
- Bus. Loop—Santa Fe, New Mexico
- Bus. Loop (15)—Las Vegas, New Mexico
- Bus. Loop (16)—Springer, New Mexico
- Bus. Loop (17)—Raton, New Mexico
- State Highway 25B Spur—Aguilar, Colorado
- State Highway 25C—Walsenburg, Colorado
- State Highway 25 Bus.—Colorado Springs, Colorado
- State Highway 25 Bus.—Castle Rock, Colorado
- I-25 Bus.—Cheyenne, Wyoming
- I-25 Bus.—Chugwater, Wyoming
- I-25 Bus.—Wheatland, Wyoming
- I-25 Bus.—Douglas, Wyoming
- I-25 Bus.—Glenrock, Wyoming
Interstate 126
- I-126 Bus. Spur—Columbia, South Carolina
Interstate 526
- I-526 Bus. Spur—Mount Pleasant, South Carolina
Interstate 27
- Bus. I-27-T—Hale Center, Texas
- Bus. I-27-U—Plainview, Texas
Interstate 29
- I-29 Bus.—Saint Joseph, Missouri
- I-29 Bus.—Elk Point, South Dakota
- I-29 Bus.—Brookings, South Dakota
- I-29 Downtown Spur—Sioux Falls, South Dakota
- I-29P Bus.—North Sioux City, South Dakota (unsigned)
Interstate 229
- I-229 Downtown Loop—Sioux Falls, South Dakota
Interstate 30
- I-30 Bus.—Little Rock, Arkansas
- I-30 Bus.—Benton, Arkansas
Interstate 35
- Bus. Spur I-35-A—Laredo, Texas
- Bus. I-35-B—Encinal, Texas
- Bus. I-35-C—Cotulla, Texas
- Bus. I-35-D—Dilley, Texas
- Bus. I-35-E—Pearsall, Texas
- Bus. I-35-H—New Braunfels, Texas
- Bus. I-35-J—Kyle, Texas
- Bus. I-35-L—Round Rock, Texas
- Bus. I-35-M—Georgetown, Texas (Cancelled July 2006)
- Bus. Spur I-35-V—Alvarado, Texas
- Bus. I-35-X—Sanger, Texas
- I-35 Bus. Loop—Ames, Iowa
- I-35 Bus. Loop—Clear Lake, Iowa
- I-35 Bus.—Faribault, Minnesota
- I-35 Bus.—Albert Lea, Minnesota
- I-35 Bus.—Pine City, Minnesota
Interstate 40
- I-40 Bus.—Needles, California
- State Bus. Route 40 (0)—Kingman, Arizona
- State Bus. Route 40 (1)—Seligman, Arizona
- State Bus. Route 40 (2)—Ash Fork, Arizona
- State Bus. Route 40 (3)—Williams, Arizona
- State Bus. Route 40 (4)—Flagstaff, Arizona
- State Bus. Route 40 (5)—Flagstaff, Arizona
- State Bus. Route 40 (6)—Winslow, Arizona
- State Route 40 Spur—Winslow, Arizona
- State Bus. Route 40 (7)—Joseph City, Arizona
- State Bus. Route 40 (8)—Holbrook, Arizona
- I-40 Bus.—Gallup, New Mexico
- I-40 Bus.—Grants, New Mexico
- I-40 Bus.—Albuquerque, New Mexico
- Bus. Route 40 (34)—Moriarty, New Mexico
- Bus. Route 40 (35)—Santa Rosa, New Mexico
- Bus. Route 40 (36)—Tucumcari, New Mexico
- Bus. I-40-A†—Glenrio, Texas
- Bus. I-40-B—Adrian, Texas
- Bus. I-40-C—Vega, Texas
- Bus. I-40-D—Amarillo, Texas
- Bus. I-40-F—Groom, Texas
- Bus. I-40-H—McLean, Texas
- Bus. I-40-J—Shamrock, Texas
- I-40 Bus.—Erick, Oklahoma
- I-40 Bus.—Sayre, Oklahoma
- I-40 Bus.—Elk City, Oklahoma
- I-40 Bus.—Clinton, Oklahoma
- I-40 Bus.—Weatherford, Oklahoma
- I-40 Bus.—El Reno, Oklahoma
- I-40 Bus.—Henryetta, Oklahoma
- I-40 Bus.—Sallisaw, Oklahoma
- I-40 Bus.—Winston-Salem and Greensboro, North Carolina (Winston-Salem portion removed in February 2020; Greensboro portion (separated by a six-mile gap) removed September 2008)
- I-40 Bus.—Raleigh, North Carolina (Replaced by Interstate 440)
† Business Loop I-40 for Glenrio, Texas is a spur route (at the New Mexico state line it becomes a country road), but is posted as a business loop.
Interstate 44
- I-44 Bus.—Joplin, Missouri
- I-44 Bus.—Sarcoxie, Missouri
- I-44 Bus.—Mount Vernon, Missouri
- I-44 Bus.—Springfield, Missouri
- I-44 Bus.—Lebanon, Missouri
- I-44 Bus.—Waynesville/St. Robert, Missouri
- I-44 Bus. Spur—Ft. Leonard Wood, Missouri
- I-44 Bus.—Rolla, Missouri
- I-44 Bus.—Pacific, Missouri
Interstate 45
- Bus. I-45-F—Corsicana, Texas
- Bus. I-45-G—Ennis, Texas
- Bus. I-45-H—Palmer, Texas
- Bus. I-45-J—Ferris, Texas
Interstate 49
- I-49 Bus.—Neosho, Missouri
- I-49 Bus.—Joplin, Missouri
- I-49 Bus.—Nevada, Missouri
- I-49 Bus.—Butler, Missouri
Interstate 55
- I-55 Bus.—New Madrid, Missouri
- I-55 Bus.—Cape Girardeau, Missouri
- I-55 Bus.—Springfield, Illinois
- I-55 Bus.—Lincoln, Illinois
- I-55 Bus.—Bloomington-Normal, Illinois
Interstate 65
- I-65 Bus.—Lebanon, Indiana
Interstate 69
- Bus. Loop I-69—Charlotte, Michigan
- Bus. Loop I-69—Coldwater, Michigan
- Bus. Loop I-69—Lansing, Michigan
- Bus. Loop I-69—Port Huron, Michigan
Interstate 70
- I-70 Bus.—Richfield, Utah
- I-70 Bus. Spur—Salina, Utah
- I-70 Bus.—Green River, Utah
- I-70 Bus.—Grand Junction, Colorado
- I-70 Bus.—Palisade, Colorado
- I-70 Bus.—Avon, Colorado
- I-70 Bus.—Idaho Springs, Colorado
- I-70 Bus.—Denver, Colorado
- I-70 Bus.—Watkins, Colorado
- I-70 Bus.—Strasburg, Colorado
- I-70 Bus.—Limon, Colorado
- I-70 Bus.—Burlington, Colorado
- I-70 Bus.—Columbia, Missouri
- I-70 Bus.—St. Charles, Missouri
- I-70 Bus.—Springfield, Ohio
Interstate 72
- I-72 Bus.—Jacksonville, Illinois
Interstate 75
- Bus. Spur I-75—Sault Ste. Marie, Michigan
- Bus. I-75—St. Ignace, Michigan
- Bus. I-75—Gaylord, Michigan
- Bus. I-75—Grayling, Michigan
- Bus. I-75—Roscommon, Michigan
- Bus. I-75—West Branch, Michigan
- Bus. Spur I-75—Saginaw, Michigan
- Bus. I-75—Pontiac, Michigan
- Bus. I-75—Findlay, Ohio
- Bus. I-75—Sidney, Ohio
- Bus. I-75—Troy–Piqua, Ohio
- I-75 Bus.—Cordele, Georgia
- I-75 Bus.—Adel, Georgia
- I-75 Bus.—Tifton, Georgia
- I-75 Bus.—Valdosta, Georgia
Interstate 375
- Bus. Spur I-375—Detroit, Michigan (unsigned)
Interstate 376
- I-376 Bus.—Moon Township, Pennsylvania (Created in 2009, replacing PA 60 Business.[3])
Interstate 80
- I-80 Bus.—Sacramento, California
- I-80 Bus. Spur—Sacramento, California
- I-80 Bus.—Truckee, California
- I-80 Bus.—Verdi, Nevada
- I-80 Bus.—Reno–Sparks, Nevada
- I-80 Bus.—Winnemucca, Nevada
- I-80 Bus.—Carlin, Nevada
- I-80 Bus.—Battle Mountain, Nevada
- I-80 Bus.—West Wendover, Nevada and Wendover, Utah
- I-80 Bus.—Evanston, Wyoming
- I-80 Bus.—Fort Bridger-Lyman, Wyoming
- I-80 Bus.—Green River, Wyoming
- I-80 Bus.—Rock Springs, Wyoming
- I-80 Bus.—Rawlins, Wyoming
- I-80 Bus.—Laramie, Wyoming
- I-80 Bus.—Cheyenne, Wyoming
- I-80 Bus.—Pine Bluffs, Wyoming
Interstate 83
- I-83 Bus.—York, Pennsylvania
Interstate 84 (east)
- I-84 Bus.—Newtown, Connecticut (Now signed as part of US Route 6.)
Interstate 84 (west)
- I-84 Bus.—Nampa and Caldwell, Idaho (Part of old US 30)
- I-84 Bus.—Mountain Home, Idaho
- I-84 Bus.—Hammett, Idaho
- I-84 Bus.—Glenns Ferry, Idaho
- I-84 Bus.—Bliss, Idaho (unsigned)
- I-84 Bus.—Jerome, Idaho (Possibly being planned further)
- I-84 Bus.—Burley and Heyburn, Idaho
- I-84 Bus.—Tremonton, Utah (Cosigned with Bus I-15)
- I-84 Bus.—Brigham City, Utah (Cosigned with Bus I-15)
Interstate 85
- I-85 Business—Greensboro, North Carolina (Soon to be removed in 2020)
- I-85 Business—Spartanburg, South Carolina
Interstate 385
- I-385 Bus. Spur—Greenville, South Carolina (Unsigned since 2007)
Interstate 585
Interstate 86 (west)
- I-86 Bus.—American Falls, Idaho
Interstate 89
- I-89 Bus. Spur—Lebanon, New Hampshire
Interstate 90
- I-90 Bus.—Ellensburg, Washington
- I-90 Bus.—Moses Lake, Washington
- I-90 Bus.—Medical Lake, Washington
- I-90 Bus.—Spokane Valley, Washington
- I-90 Bus.—Wallace, Idaho
- I-90 Bus.—Missoula, Montana
- I-90 Bus.—Deer Lodge, Montana
- I-90 Bus.—Butte, Montana (Co-signed with Bus. I-15 (Butte, Montana))
- I-90 Bus.—Billings, Montana
- I-90 Bus.—Sundance, Wyoming
- I-90 Bus.—Spearfish, South Dakota
- I-90 Bus.—Sturgis, South Dakota
- I-90 Bus.—Rapid City, South Dakota
- I-90 Bus.—Wall, South Dakota
- I-90 Bus.—Kadoka, South Dakota
- I-90 Bus. Spur—Belvidere, South Dakota
- I-90 Bus.—Murdo, South Dakota
- I-90 Bus.—Vivian, South Dakota
- I-90 Bus.—Presho, South Dakota
- I-90 Bus.—Oacoma/Chamberlain, South Dakota
- I-90 Bus. Spur—White Lake, South Dakota (unsigned)
- I-90 Bus.—Plankinton, South Dakota
- I-90 Bus.—Mitchell, South Dakota
- I-90 Bus. Spur—Sioux Falls, South Dakota
Interstate 94
- Bus. Loop I-94—Benton Harbor–St. Joseph, Michigan
- Bus. Loop I-94—Kalamazoo, Michigan
- Bus. Loop I-94—Battle Creek, Michigan
- Bus. Loop I-94—Marshall, Michigan
- Bus. Loop I-94—Albion, Michigan
- Bus. Loop I-94—Jackson, Michigan
- Bus. Loop I-94—Ann Arbor, Michigan
- Bus. Loop I-94—Port Huron, Michigan
Interstate 95
- I-95 Bus.—Brunswick, Georgia
- I-95 Bus.—Darien, Georgia
- I-95 Bus.—Fayetteville, North Carolina
- I-95 Bus.—Wilson and Rocky Mount, North Carolina
- I-95 Bus.—Emporia, Virginia
- I-95 Bus.—Wilmington, Delaware (Proposed around 2000 (I-95 would have shifted to what is still I-495), but rejected by city's mayor—section was temporarily signed as I-895 in early 1980s.)
- I-95 Bus.- Mystic, Connecticut
Interstate 495
- I-495 Bus. Spur—Lowell, Massachusetts
Interstate 96
- Bus. Spur I-96—Muskegon, Michigan
- Bus. Spur I-96—Portland, Michigan
- Bus. Loop I-96—Lansing, Michigan
- Bus. Loop I-96—Howell, Michigan
- Bus. Loop I-96—Farmington, Michigan
- Bus. Spur I-96—Detroit, Michigan
Interstate 196
- Bus. Loop I-196—South Haven, Michigan
- Bus. Loop I-196—Holland, Michigan
- Bus. Spur I-196—Wyoming, Michigan
Interstate 496
Interstate 696
- Bus. Spur I-696—Detroit, Michigan
References
- Weingroff, Richard F. (Summer 1996). "Federal-Aid Highway Act of 1956, Creating the Interstate System". Public Roads. Washington, DC: Federal Highway Administration. 60 (1). Retrieved March 16, 2012.
- Special Committee on U.S. Route Numbering (November 15, 1997). "Report of the Special Committee on U.S. Route Numbering to the Standing Committee on Highways" (PDF) (Report). Washington, DC: American Association of State Highway and Transportation Officials. Archived (PDF) from the original on October 16, 2017.
- District 11-0 (August 19, 2009). "I-376 Corridor New Exit Numbers" (PDF). Pennsylvania Department of Transportation. Retrieved November 21, 2009.