List of business routes of the Interstate Highway System

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Dwight D. Eisenhower National System of Interstate and Defense Highways
Interstate 24 Business markerInterstate 196 Business marker
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

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. The routes 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.

As the main purpose of a Business Interstate is to serve a downtown area, it is typically routed on surface roads. Thus Business Interstates do not 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 Interstate 40 Business in Winston-Salem, North Carolina and Interstate 80 Business in Sacramento, California).

Unlike 3-digit Interstate spurs, business Interstates can be repeated in 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-27I-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-376 I-77 I-78 I-79 I-80 I-81 I-82 I-83 I-84(W) I-85 I-86 I-87 I-89 I-90 I-94 I-95 I-495 I-96 I-196 I-496 I-696 Exceptions


List of Business Routes[edit]

Route Cities Status

Interstate 5[edit]

Business Loop San Ysidro, National City and San Diego, California Removed
Business Loop San Diego, California Removed
Business Loop Solana Beach, California Removed
Business Loop San Clemente, California Removed
Business Loop Los Angeles, California Removed
Business Loop Woodland, California Existing
Business Loop Arbuckle, California Existing
Business Loop Williams and Maxwell, California Existing
Business Loop Willows and Orland, California Existing
Business Loop Red Bluff, California Existing
Business Loop Cottonwood, California Removed
Business Loop Anderson and Redding, California Removed
Business Loop Dunsmuir, California Existing
Business Loop Mount Shasta, California Existing
Business Loop Weed, California Existing
Business Loop Gazelle, California Existing
Business Loop Yreka, California Existing
Business Loop Vancouver, Washington Removed
Business Loop Castle Rock, Washington Existing
Business Loop Chehalis and Centralia, Washington Existing
Business Loop Olympia, Washington Removed
Business Loop Everett, Washington Removed
Business Loop Marysville, Washington Removed
Business Loop Bellingham, Washington Removed

Interstate 205[edit]

Business Loop Tracy, California Existing

Interstate 8[edit]

Business Loop San Diego, California Removed
Business Loop El Cajon, California Existing
Business Loop Alpine, California Existing
Business Loop El Centro, California Existing
Business Loop Winterhaven, California and Yuma, Arizona Existing
Business Loop Gila Bend, Arizona Existing

Interstate 10[edit]

Business Loop Ontario, California Removed
Business Loop Colton, California Removed
Business Loop Indio, California Removed
Business Loop Blythe, California Existing
Business Loop Quartzsite, Arizona Existing
Business Loop Phoenix, Arizona Removed
Business Loop Casa Grande, Arizona Removed
Business Loop Tucson, Arizona Removed
Business Loop Tucson, Arizona Removed
Business Loop Benson, Arizona Existing
Business Spur Benson, Arizona Removed
Business Loop Willcox, Arizona Existing
Business Loop Bowie, Arizona Existing
Business Loop San Simon, Arizona Existing
Business Loop Lordsburg, New Mexico Existing
Business Loop Deming, New Mexico Existing
Business Loop Las Cruces, New Mexico Removed
Business Loop "C" Sierra Blanca, Texas Existing
Business Loop "D" Van Horn, Texas Existing
Business Loop "F" Balmorhea, Texas Existing
Business Loop "G" Fort Stockton, Texas Existing

Interstate 15[edit]

Business Loop Escondido, California Existing
Business Loop Mesquite, Nevada Existing
Business Loop St. George, Utah Existing
Business Loop Cedar City, Utah Existing
Business Loop Parowan, Utah Existing
Business Loop Beaver, Utah Existing
Business Loop Fillmore, Utah Existing
Business Loop Holden, Utah ?
Business Loop Nephi, Utah Existing
Business Loop Layton, Utah ?
Business Loop Brigham City, Utah Existing
Business Loop Tremonton, Utah Existing
Business Loop Pocatello, Idaho Existing
Business Loop Idaho Falls, Idaho Existing
Business Loop Butte, Montana Existing
Business Loop Helena, Montana Existing
Business Loop Great Falls, Montana Existing
Business Loop Conrad, Montana Existing
Business Loop Shelby, Montana Existing

Interstate 17[edit]

Business Loop Black Canyon City, Arizona Existing

Interstate 19[edit]

Business Loop Nogales, Arizona Existing

Interstate 20[edit]

Business Loop "B" Pecos, Barstow, Texas Existing
Business Loop "D" Monahans, Texas Existing
Business Loop "E" Odessa, Midland, Texas Existing
Business Loop "F" Stanton, Texas Existing
Business Loop "G" Big Spring, Texas Existing
Business Loop "H" Westbrook, Texas Existing
Business Loop "J" Colorado City, Texas Existing
Business Loop "K" Loraine, Texas Existing
Business Spur "L" Roscoe, Texas Existing
Business Loop "M" Sweetwater, Texas Existing
Business Loop "N" Trent, Texas Existing
Business Loop "P" Merkel, Texas Existing
Business Loop "Q" Tye, Texas Existing
Business Loop "R" Abilene, Texas Existing
Business Loop "T" Baird, Texas Existing
Business Spur Florence, South Carolina Existing

Interstate 24[edit]

Business Loop Paducah, Kentucky Existing
Downtown Loop ¹ Paducah, Kentucky Removed

Interstate 25[edit]

Business Loop Raton, New Mexico Existing
Business Loop Cheyenne, Wyoming Existing

Interstate 126[edit]

Business Spur Columbia, South Carolina Removed

Interstate 526[edit]

Business Spur Mount Pleasant, South Carolina Existing

Interstate 27[edit]

Business Loop "T" Hale Center, Texas Existing
Business Loop "U" Plainview, Texas Existing

Interstate 29[edit]

Business Loop Saint Joseph, Missouri Existing
Business Loop Elk Point, South Dakota Existing
Business Loop Brookings, South Dakota Existing
Downtown Spur Sioux Falls, South Dakota Existing
Business Spur North Sioux City, South Dakota Existing/unsigned

Interstate 229[edit]

Downtown Loop Sioux Falls, South Dakota Existing

Interstate 30[edit]

Business Loop Little Rock, Arkansas Removed
Business Loop Benton, Arkansas Removed

Interstate 35[edit]

Business Spur "A" Laredo, Texas Existing
Business Loop "B" Encinal, Texas Existing
Business Loop "C" Cotulla, Texas Existing
Business Loop "D" Dilley, Texas Existing
Business Loop "E" Pearsall, Texas Existing
Business Loop "H" New Braunfels, Texas Existing
Business Loop "J" Kyle, Texas Existing
Business Loop "L" Round Rock, Texas Existing
Business Loop "M" Georgetown, Texas Cancelled July 2006
Business Spur "V" Alvarado, Texas Existing
Business Loop "X" Sanger, Texas Existing
Business Loop Ames, Iowa Existing
Business Loop Clear Lake, Iowa Existing
Business Loop Pine City, Minnesota Existing

Interstate 40[edit]

Business Loop Needles, California Existing
Business Loop Kingman, Arizona Existing
Business Loop Seligman, Arizona Existing
Business Loop Ash Fork, Arizona Existing
Business Loop Williams, Arizona Existing
Business Loop Flagstaff, Arizona Existing
Business Loop Winslow, Arizona Existing
Business Loop Joseph City, Arizona Existing
Business Loop Holbrook, Arizona Existing
Business Loop Gallup, New Mexico Existing
Business Loop Grants, New Mexico Existing
Business Loop Albuquerque, New Mexico Existing
Business Loop Santa Rosa, New Mexico Existing
Business Loop Tucumcari, New Mexico Existing
Business Loop "A"† Glenrio, Texas Existing
Business Loop "B" Adrian, Texas Existing
Business Loop "C" Vega, Texas Existing
Business Loop "D" Amarillo, Texas Existing
Business Loop "F" Groom, Texas Existing
Business Loop "H" McLean, Texas Existing
Business Loop "J" Shamrock, Texas Existing
Business Loop Erick, Oklahoma Existing
Business Loop Sayre, Oklahoma Existing
Business Loop Elk City, Oklahoma Existing
Business Loop Clinton, Oklahoma Existing
Business Loop Weatherford, Oklahoma Existing
Business Loop El Reno, Oklahoma Existing
Business Loop Henryetta, Oklahoma Existing
Business Loop Sallisaw, Oklahoma Existing
Business Loop Winston-Salem and Greensboro, North Carolina Winston-Salem portion existing; Greensboro portion (separated by a six-mile gap) removed September 2008
Business Loop Raleigh, North Carolina Removed

Interstate 44[edit]

Business Loop Joplin, Missouri Existing
Business Loop Sarcoxie, Missouri Existing
Business Loop Mount Vernon, Missouri Existing
Business Loop Springfield, Missouri Existing
Business Loop Lebanon, Missouri Existing
Business Loop Waynesville/St. Robert, Missouri Existing
Business Spur Ft. Leonard Wood, Missouri Existing
Business Loop Rolla, Missouri Existing
Business Loop Pacific, Missouri Existing

Interstate 45[edit]

Business Loop "F" Corsicana, Texas Existing
Business Loop "G" Ennis, Texas Existing
Business Loop "H" Palmer, Texas Existing
Business Loop "J" Ferris, Texas Existing

Interstate 49[edit]

Business Loop Neosho, Missouri Existing
Business Loop Joplin, Missouri Existing
Business Loop Nevada, Missouri Existing
Business Loop Butler, Missouri Existing

Interstate 55[edit]

Business Loop New Madrid, Missouri Existing
Business Loop Cape Girardeau, Missouri Existing
Business Loop Springfield, Illinois Existing
Business Loop Lincoln, Illinois Existing
Business Loop Bloomington-Normal, Illinois Existing

Interstate 65[edit]

Business Loop Lebanon, Indiana Removed

Interstate 69[edit]

Business Loop Charlotte, Michigan Existing
Business Loop Coldwater, Michigan Existing
Business Loop Lansing, Michigan Existing
Business Loop Port Huron, Michigan Existing

Interstate 70[edit]

Business Loop Richfield, Utah Existing
Business Spur Salina, Utah Existing
Business Loop Green River, Utah Existing
Business Loop Grand Junction, Colorado Existing
Business Loop Palisade, Colorado Existing
Business Loop Avon, Colorado Existing
Business Loop Idaho Springs, Colorado Existing
Business Loop Denver, Colorado Existing
Business Loop Watkins, Colorado Existing
Business Loop Strasburg, Colorado Existing
Business Loop Limon, Colorado Existing
Business Loop Burlington, Colorado Existing
Business Loop Columbia, Missouri Existing
Business Loop St. Charles, Missouri Existing
Business Loop Springfield, Ohio Existing

Interstate 72[edit]

Business Loop Jacksonville, Illinois Existing

Interstate 75[edit]

Business Spur Sault Ste. Marie, Michigan Existing
Business Loop St. Ignace, Michigan Existing
Business Loop Gaylord, Michigan Existing
Business Loop Grayling, Michigan Existing
Business Loop Roscommon, Michigan Existing
Business Loop West Branch, Michigan Existing
Business Spur Saginaw, Michigan Removed
Business Loop Pontiac, Michigan Existing
Business Loop Cordele, GA Existing
Business Loop Adel, GA Existing
Business Loop Tifton, GA Existing
Business Loop Valdosta, GA Existing

Interstate 375 (Michigan)[edit]

Business Spur Detroit, Michigan Existing but unsigned

Interstate 376[edit]

Business Loop Moon Township, Pennsylvania Existing, created in 2009, replacing PA 60 Business.[3]

Interstate 80[edit]

Business Loop Sacramento, California Existing
Business Spur Sacramento, California Removed
Business Loop Truckee, California Existing
Business Loop Verdi, Nevada Existing
Business Loop RenoSparks, Nevada Existing
Business Loop Carlin, Nevada Existing
Business Loop Battle Mountain, Nevada Existing
Business Loop West Wendover, Nevada and Wendover, Utah Existing
Business Loop Evanston, Wyoming Existing
Business Loop Cheyenne, Wyoming Existing
Business Loop Pine Bluffs, Wyoming Existing

Interstate 83[edit]

Business Loop York, Pennsylvania Existing

Interstate 84 (east)[edit]

Business Loop Newtown, Connecticut Removed. Now signed as part of US Route 6.

Interstate 84 (west)[edit]

Business Loop Nampa and Caldwell, Idaho Existing, Part of old US 30
Business Loop Mountain Home, Idaho Existing
Business Loop Hammett, Idaho Existing
Business Loop Glenns Ferry, Idaho Existing
Business Loop Bliss, Idaho Existing, unsigned
Business Loop Jerome, Idaho Existing, possibly being planned further
Business Loop Burley, Idaho Existing
Business Loop Tremonton, Utah Existing, Cosigned with Bus I-15
Business Loop Brigham City, Utah Existing, Cosigned with Bus I-15

Interstate 85[edit]

Business Loop North Carolina Existing
Business Loop Spartanburg, South Carolina Existing

Interstate 385[edit]

Business Spur Greenville, South Carolina Existing

Interstate 585[edit]

Business Spur Spartanburg, South Carolina Existing

Interstate 86 (west)[edit]

Business Loop American Falls, Idaho Existing

Interstate 89[edit]

Business Spur Lebanon, New Hampshire Removed

Interstate 90[edit]

Business Loop Ellensburg, Washington Existing
Business Loop Moses Lake, Washington Existing
Business Loop Medical Lake, Washington Existing
Business Loop Wallace, Idaho Existing
Business Loop Missoula, Montana Existing
Business Loop Deer Lodge, Montana Existing
Business Loop Butte, Montana Existing (co-signed with Bus. I-15 (Butte, Montana)
Business Loop Billings, Montana Existing
Business Loop Sundance, Wyoming Existing
Business Loop Spearfish, South Dakota Existing
Business Loop Sturgis, South Dakota Existing
Business Loop Rapid City, South Dakota Existing
Business Loop Wall, South Dakota Existing
Business Loop Kadoka, South Dakota Existing
Business Spur Belvidere, South Dakota Existing
Business Loop Murdo, South Dakota Existing
Business Loop Vivian, South Dakota Existing
Business Loop Presho, South Dakota Existing
Business Loop Oacoma/Chamberlain, South Dakota Existing
Business Spur White Lake, South Dakota Existing/unsigned
Business Loop Plankinton, South Dakota Existing
Business Loop Mitchell, South Dakota Existing
Downtown Spur Sioux Falls, South Dakota Existing

Interstate 94[edit]

Business Loop Benton Harbor/St. Joseph, Michigan Existing
Business Loop Kalamazoo, Michigan Existing
Business Loop Battle Creek, Michigan Existing
Business Loop Marshall, Michigan Existing
Business Loop Albion, Michigan Existing
Business Loop Jackson, Michigan Existing
Business Loop Ann Arbor, Michigan Existing
Business Loop Port Huron, Michigan Existing

Interstate 95[edit]

Business Loop Brunswick, Georgia Removed
Business Loop Darien, Georgia Existing
Business Loop Fayetteville, North Carolina Existing
Business Loop Wilson and Rocky Mount, North Carolina Removed
Business Loop 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.
Business Loop Mystic, Connecticut Removed

Interstate 495[edit]

Business Spur Lowell, Massachusetts Removed; officially "American Legion Connector Highway", commonly known (especially by locals) as the Lowell Connector-originally signed as Business Spur I-495: one sign remains still indicating Business Spur I-495

Interstate 96[edit]

Business Spur Muskegon, Michigan Removed
Business Spur Portland, Michigan Removed
Business Loop Lansing, Michigan Existing
Business Loop Howell, Michigan Existing
Business Loop Farmington, Michigan Removed
Business Spur Detroit, Michigan Removed

Interstate 196[edit]

Business Loop South Haven, Michigan Existing
Business Loop Holland, Michigan Existing
Business Spur Grand Rapids, Michigan Existing

Interstate 496[edit]

Capitol Loop Lansing, Michigan Existing

Interstate 696[edit]

Business Spur Detroit, Michigan Removed

† Business Loop I-40 for Glenrio, Texas is actually a spur route (at the New Mexico state line it becomes a country road), but is posted as a business loop.

¹ Downtown Loop I-24 in Paducah, Kentucky was changed to Business Loop I-24 in 2002.

References[edit]

  1. ^ 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. 
  2. ^ AASHTO, Report of the Standing Committee on U.S. Route Numbering to the Standing Committee on Highways, November 15, 1997
  3. ^ PennDOT District 11-0, I-376 Corridor New Exit Numbers, August 19, 2009, accessed November 2009

External links[edit]