List of business routes of the Interstate Highway System

Dwight D. Eisenhower National System of Interstate and Defense Highways
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
Interstate Highway System Main Auxiliary Suffixed Business

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-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 Exceptions

List of Business Routes

This transport-related list is incomplete; you can help by expanding it.

Route	Cities	Status

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

Business Loop	Tracy, California	Existing

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 "1" (AZ)	Winterhaven, California and Yuma, Arizona	Existing
Business Loop "3"	Gila Bend, Arizona	Existing

Business Loop	Ontario, California	Removed
Business Loop	Colton, California	Removed
Business Loop	Indio, California	Removed
Business Loop	Blythe, California	Existing
Business Loop "1"	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 "3"	Benson, Arizona	Existing
Business Spur	Benson, Arizona	Removed
Business Loop "4"	Willcox, Arizona	Existing
Business Loop "5"	Bowie, Arizona	Existing
Business Loop "6"	San Simon, Arizona	Existing
Business Loop "21"	Lordsburg, New Mexico	Existing
Business Loop "22"	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

Business Loop	Escondido, California	Existing
Business Loop	Victorville, California	Existing
Business Loop	Mesquite, Nevada	Removed
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

Business Loop	Black Canyon City, Arizona	Removed

Business Loop "1"	Nogales, Arizona	Existing
Business Loop "2"	Sahuarita, Arizona – Tucson, Arizona	Existing

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

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

Business Loop "11"	Williamsburg, New Mexico – Truth or Consequences, New Mexico	Existing
Business Loop "12"	Socorro, New Mexico	Existing
Business Loop "13"	Belen, New Mexico	Existing
Business Loop	Santa Fe, New Mexico	Removed
Business Loop "15"	Las Vegas, New Mexico	Existing
Business Loop "16"	Springer, New Mexico	Existing
Business Loop "17"	Raton, New Mexico	Existing
Business Spur	Aguilar, Colorado	Existing
Business Loop	Walsenburg, Colorado	Existing
Business Loop	Colorado Springs, Colorado	Removed
Business Loop	Castle Rock, Colorado	Removed
Business Loop	Cheyenne, Wyoming	Existing
Business Loop	Chugwater, Wyoming	Existing
Business Loop	Wheatland, Wyoming	Existing
Business Loop	Douglas, Wyoming	Existing
Business Loop	Glenrock, Wyoming	Existing

Business Spur	Columbia, South Carolina	Removed

Business Spur	Mount Pleasant, South Carolina	Existing

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

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

Downtown Loop	Sioux Falls, South Dakota	Existing

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

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	Faribault, Minnesota	Existing
Business Loop	Pine City, Minnesota	Existing

Business Loop	Needles, California	Existing
Business Loop	Kingman, Arizona	Removed
Business Loop "1"	Seligman, Arizona	Existing
Business Loop "2"	Ash Fork, Arizona	Existing
Business Loop	Williams, Arizona	Removed
Business Loop "4"	Flagstaff, Arizona	Existing
Business Loop "6"	Winslow, Arizona	Existing
Business Loop "7"	Joseph City, Arizona	Existing
Business Loop "8"	Holbrook, Arizona	Existing
Business Loop	Gallup, New Mexico	Removed
Business Loop	Grants, New Mexico	Removed
Business Loop	Albuquerque, New Mexico	Removed
Business Loop "34"	Moriarty, New Mexico	Existing
Business Loop "35"	Santa Rosa, New Mexico	Existing
Business Loop "36"	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

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

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

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

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

Business Loop	Lebanon, Indiana	Removed

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

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

Business Loop	Jacksonville, Illinois	Existing

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

Business Spur	Detroit, Michigan	Existing but unsigned

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

Business Loop	Sacramento, California	Existing
Business Spur	Sacramento, California	Removed
Business Loop	Truckee, California	Existing
Business Loop	Verdi, Nevada	Existing
Business Loop	Reno–Sparks, Nevada	Existing
Business Loop	Winnemucca, 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	Fort Bridger-Lyman, Wyoming	Existing
Business Loop	Green River, Wyoming	Existing
Business Loop	Rock Springs, Wyoming	Existing
Business Loop	Rawlins, Wyoming	Existing
Business Loop	Laramie, Wyoming	Existing
Business Loop	Cheyenne, Wyoming	Existing
Business Loop	Pine Bluffs, Wyoming	Existing

Business Loop	York, Pennsylvania	Existing

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

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

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

Business Spur	Greenville, South Carolina	Removed

Business Spur	Spartanburg, South Carolina	Removed

Business Loop	American Falls, Idaho	Existing

Business Spur	Lebanon, New Hampshire	Removed

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

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

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

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

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

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

Capitol Loop	Lansing, Michigan	Existing

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

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

External links

Interstate Business Routes @ Interstate-Guide.com

Main Interstate Highways

Signed

2
4
5
8
10
12
15
16
17
19
20
22
24
25
26
27
29
30
35
37
39
40
41
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
H-1
H-2
H-3

Unsigned

Lists

Primary	Main Suffixed Temporary Future

Auxiliary	Main

Other	Standards Business Bypassed Gaps Tolled

Major Interstates highlighted

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