From Wikipedia, the free encyclopedia
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
Formed June 29, 1956
[1]
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)
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 (AASHTO). 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.
As the main purpose of these routes are to serve a certain
downtown area, Business Interstates are typically routed along surface roads. These routes do not have to meet
Interstate Highway standards and are not considered part of the Interstate Highway System. AASHTO does, however, apply similar standards as to new
U.S. Highways , 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. Highways 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.
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. —
Irvine, California
I-5 Bus. —
Los Angeles, California
I-5 Bus. –
Coalinga, 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. —
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. —
Fife, Washington and Midway (near
Des Moines, Washington )
I-5 Bus. —
Seattle, Washington
I-5 Bus. —
Marysville, Washington and
Everett, Washington
I-5 Bus. —
Bellingham, Washington
Interstate 205
Interstate 8
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
BL 21 —
Lordsburg, New Mexico
BL 22 —
Deming, New Mexico
BL —
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
Interstate 19
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 BS —
Florence, South Carolina
Interstate 24
¹ Downtown Loop I-24 in Paducah, Kentucky was changed to Business Loop I-24 in 2002.
Interstate 25
BL (11) —
Williamsburg, New Mexico –
Truth or Consequences, New Mexico
BL (12) —
Socorro, New Mexico
BL (13) —
Belen, New Mexico
BL (14) —
Santa Fe, New Mexico
BL (15) —
Las Vegas, New Mexico
BL (16) —
Springer, New Mexico
BL (17) —
Raton, New Mexico
State Highway 25A —
Trinidad, Colorado
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 (Likely unsigned)
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
I-25 Bus. —
Casper, Wyoming
I-25 Bus. —
Buffalo, Wyoming
Interstate 126
Interstate 526
Interstate 27
Interstate 29
Interstate 229
Interstate 30
Interstate 35
BS 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)
BS I-35-V —
Alvarado, Texas
Bus. I-35-X —
Sanger, Texas
I-35 BL —
Ames, Iowa
I-35 BL —
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
Interstate 45
Interstate 49
Interstate 55
Interstate 65
Interstate 69
Interstate 70
I-70 Bus. —
Richfield, Utah
I-70 BS —
Salina, Utah
I-70 Bus. —
Green River, Utah
I-70 Bus. —
Grand Junction, Colorado
I-70 Bus. —
Palisade, Colorado
I-70 Bus. —
Rifle, Colorado (Unsigned)
I-70 Bus. —
Silt, Colorado (Unsigned)
I-70 Bus. —
Eagle, Colorado (Unsigned)
I-70 Bus. —
Edwards, Colorado (Unsigned)
I-70 Bus. —
Avon, Colorado
I-70 Bus. —
Frisco, Colorado
I-70 Bus. —
Idaho Springs, Colorado
I-70 Bus. —
Denver, Colorado
I-70 Bus. —
Watkins, Colorado
I-70 Bus. —
Strasburg, Colorado (Unsigned)
I-70 Bus. —
Deer Trail, Colorado (Unsigned)
I-70 Bus. —
Agate, Colorado (Unsigned)
I-70 Bus. —
Limon, Colorado
I-70 Bus. —
Vona, Colorado (Unsigned)
I-70 Bus. —
Burlington, Colorado
I-70 Bus. —
Colby, Kansas
I-70 Bus. —
Oakley, Kansas
I-70 Bus. —
Hays, Kansas
I-70 Bus. —
Boonville, Missouri
I-70 Bus. —
Columbia, Missouri
I-70 Bus. —
St. Charles, Missouri
I-70 Bus. —
Springfield, Ohio
Interstate 72
Interstate 75
BS I-75 —
Sault Ste. Marie, Michigan
BL I-75 —
St. Ignace, Michigan
BL I-75 —
Gaylord, Michigan
BL I-75 —
Grayling, Michigan
BL I-75 —
Roscommon, Michigan
BL I-75 —
West Branch, Michigan
BL I-75 —
Saginaw, Michigan
BL I-75 —
Pontiac, Michigan
BL I-75 —
Findlay, Ohio
BL I-75 —
Sidney, Ohio
BL 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
Interstate 76 (west)
Interstate 376
Interstate 80
I-80 Bus. —
Sacramento, California
I-80 BS —
Sacramento, California
I-80 Bus. —
Truckee, California
I-80 Bus. —
Lincoln, Nebraska
I-80 Bus. —
Sidney, Nebraska
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
Interstate 84 (east)
Interstate 84 (west)
Interstate 85
Interstate 385
Interstate 585
Interstate 86 (west)
Interstate 89
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 BS —
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 BS —
White Lake, South Dakota (unsigned)
I-90 Bus. —
Plankinton, South Dakota
I-90 Bus. —
Mitchell, South Dakota
I-90 BS —
Sioux Falls, South Dakota
Interstate 94
Interstate 95
Interstate 495
Interstate 96
Interstate 196
Interstate 496
Interstate 696
See also
References
External links
Signed Unsigned Lists Other Routes in italics are no longer a part of the system. Major Interstates are highlighted.