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Business Spur blank.svgBusiness Spur blank wide.svgBusiness Loop blank.svgBusiness Loop blank wide.svg
Business Spur and Business Loop shields

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. [1] 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

Route Cities Status
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Interstate 5

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

Business Loop Tracy, California existing

Interstate 8

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

Business Loop Ontario, California existing
Business Loop Colton, California existing
Business Loop Indio, California existing
Business Loop Blythe, California existing
Business Loop Quartzsite, Arizona existing
Business Loop Phoenix, Arizona removed
Business Loop Casa Grande, Arizona existing
Business Loop Tucson, Arizona removed
Business Loop Tucson, Arizona existing
Business Loop Benson, Arizona existing
Business Spur Benson, Arizona existing
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

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

Interstate 17

Business Loop Black Canyon City, Arizona existing

Interstate 19

Business Loop Nogales, Arizona existing

Interstate 20

Business Loop "B" Pecos, 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

Business Loop Paducah, Kentucky existing
Downtown Loop ¹ Paducah, Kentucky removed

Interstate 25

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

Interstate 27

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

Interstate 29

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

Downtown Loop Sioux Falls, South Dakota existing

Interstate 30

Business Loop Little Rock, Arkansas removed
Business Loop Benton, Arkansas removed

Interstate 35

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 Loop "V" Alvarado, Texas existing
Business Loop "X" Sanger, Texas existing
Business Loop Ames, Iowa existing
Business Loop Clear Lake, Iowa existing

Interstate 40

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 hiatus) removed September 2008
Business Loop Raleigh, North Carolina removed

Interstate 44

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

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 54

Business Loop El Cajon, California existing, replaced CA-54

Interstate 55

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

Business Loop Lebanon, Indiana removed

Interstate 69

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

Interstate 70

Business Loop Richfield, Utah existing
Business Loop 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

Business Loop Jacksonville, Illinois existing

Interstate 75

Business Loop St. Ignace, Michigan existing
Business Spur Sault Ste. Marie, Michigan existing
Business Loop Pontiac, Michigan existing
Business Loop Gaylord, Michigan existing
Business Loop Grayling, Michigan existing
Business Loop West Branch, Michigan existing
Business Loop Roscommon, Michigan existing

Interstate 376

Business Loop Moon Township, Pennsylvania Existing, created in 2009, replacing PA 60 Business.[2]

Interstate 80

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

Interstate 83

Business Loop York, Pennsylvania existing

Interstate 84 (west)

Business Loop Nampa and Caldwell, Idaho existing
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 Burley, Idaho existing

Interstate 85

Business Loop North Carolina existing
Business Loop Spartanburg, South Carolina existing

Interstate 89

Business Spur Lebanon, New Hampshire removed

Interstate 90

Business Loop Ellensburg, Washington existing
Business Loop Moses Lake, Washington existing
Business Loop Medical Lake, Washington existing
Business Loop Missoula, Montana existing
Business Loop Deer Lodge, Montana existing
Business Loop Butte, Montana existing
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

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

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, but rejected by city's mayor – section was temporarily signed as I-895 in early 1980s.
Business Loop Mystic, Connecticut removed

Interstate 495

Business Spur Lowell, Massachusetts removed; now simply called the Lowell Connector.

Interstate 96

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

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

Interstate 496

Capitol Loop Lansing, Michigan existing

Interstate 696

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

Main Interstate Highways (major interstates highlighted)
4 5 8 10 12 15 16 17 19 20 22 24 25 26 27 29 30
35 37 39 40 43 44 45 49 55 57 59 64 65 66 68 69
70 71 72 73 74 75 76 (W) 76 (E) 77 78 79 80 81 82
83 84 (W) 84 (E) 85 86 (W) 86 (E) 87 88 (W) 88 (E) 89 90
91 93 94 95 96 97 99 (238) H-1 H-2 H-3
Unsigned  A-1 A-2 A-3 A-4 PRI-1 PRI-2 PRI-3
Lists  Primary  Main - Intrastate - Suffixed - Future - Gaps
Auxiliary  Main - Future - Unsigned
Other  Standards - Business - Bypassed

Business Spur and Business Loop shields

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. [1] 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

Route Cities Status

Interstate 5

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

Business Loop Tracy, California existing

Interstate 8

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

Business Loop Ontario, California existing
Business Loop Colton, California existing
Business Loop Indio, California existing
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

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

Interstate 17

Business Loop Black Canyon City, Arizona existing

Interstate 19

Business Loop Nogales, Arizona existing

Interstate 20

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

Business Loop Paducah, Kentucky existing
Downtown Loop ¹ Paducah, Kentucky removed

Interstate 25

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

Interstate 27

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

Interstate 29

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

Downtown Loop Sioux Falls, South Dakota existing

Interstate 30

Business Loop Little Rock, Arkansas removed
Business Loop Benton, Arkansas removed

Interstate 35

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

Interstate 40

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 hiatus) removed September 2008
Business Loop Raleigh, North Carolina removed

Interstate 44

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

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 55

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

Business Loop Lebanon, Indiana removed

Interstate 69

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

Interstate 70

Business Loop Richfield, Utah existing
Business Loop 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

Business Loop Jacksonville, Illinois existing

Interstate 75

Business Loop St. Ignace, Michigan existing
Business Spur Sault Ste. Marie, Michigan existing
Business Loop Pontiac, Michigan existing
Business Loop Gaylord, Michigan existing
Business Loop Grayling, Michigan existing
Business Loop West Branch, Michigan existing
Business Loop Roscommon, Michigan existing

Interstate 376

Business Loop Moon Township, Pennsylvania Existing, created in 2009, replacing PA 60 Business.[2]

Interstate 80

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

Interstate 83

Business Loop York, Pennsylvania existing

Interstate 84 (west)

Business Loop Nampa and Caldwell, Idaho existing
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 Burley, Idaho existing

Interstate 85

Business Loop North Carolina existing
Business Loop Spartanburg, South Carolina existing

Interstate 89

Business Spur Lebanon, New Hampshire removed

Interstate 90

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
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

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

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, but rejected by city's mayor – section was temporarily signed as I-895 in early 1980s.
Business Loop Mystic, Connecticut removed

Interstate 495

Business Spur Lowell, Massachusetts removed; now simply called the Lowell Connector.

Interstate 96

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

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

Interstate 496

Capitol Loop Lansing, Michigan existing

Interstate 696

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

Main US Interstate Highways (major interstates highlighted)
4 5 8 10 12 15 16 17 19 20 22 24 25 26 27 29 30
35 37 39 40 43 44 45 49 55 57 59 64 65 66 68 69
70 71 72 73 74 75 76 (W) 76 (E) 77 78 79 80 81 82
83 84 (W) 84 (E) 85 86 (W) 86 (E) 87 88 (W) 88 (E) 89 90
91 93 94 95 96 97 99 (238) H-1 H-2 H-3
Unsigned  A-1 A-2 A-3 A-4 PRI-1 PRI-2 PRI-3
Lists  Primary  Main - Intrastate - Suffixed - Future - Gaps
Auxiliary  Main - Future - Unsigned
Other  Standards - Business - Bypassed


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