Interstate 15 Business (Escondido, California)
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Interstate 15 Business may refer to several business routes of the Interstate Highway System that connect
Interstate 15 Interstate 15 (I-15) is a major Interstate Highway in the Western United States, running through Southern California and the Intermountain West. I-15 begins near the Mexican border in San Diego County and stretches north to Alberta, Ca ...
with the
central business district A central business district (CBD) is the Commerce, commercial and business center of a city. It contains commercial space and offices, and in larger cities will often be described as a financial district. Geographically, it often coincides wit ...
of various cities bypassed by I-15. The business route in each community is considered a unique route. In many cases, these routes are a former section of a
U.S. Route The United States Numbered Highway System (often called U.S. Routes or U.S. Highways) is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States. As the designation and numbering of these h ...
or
state highway A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either Route number, numbered or maintained by a sub-national state or province. A road numbered ...
. Interstate business routes in California are assigned by the
California Department of Transportation The California Department of Transportation (Caltrans) is an Executive (government), executive department of the U.S. state of California. The department is part of the Government of California#State agencies, cabinet-level California State Tran ...
(Caltrans), but are not maintained by Caltrans unless they overlay other routes of the state highway system. Local authorities may request route assignment from the Caltrans Transportation System Information Program, and all requests require approval of the executive committee of the
American Association of State Highway and Transportation Officials The American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test protocols, and guidelines that are used in highway A highway is any public or private road ...
(AASHTO).


Escondido business loop

Interstate 15 Business (I-15 Bus.) provides access to downtown Escondido, as Centre City Parkway. It follows the former routing of U.S. Route 395 (US 395). I-15 Bus. begins at I-15 exit 28 near the southern city limits of Escondido. It runs parallel to I-15 north through the city. It intersects both the westbound and eastbound portions of County Route S6, which in this area is split into one-way roads (which are in turn separated by another street). This intersection provides access to the end of the Sprinter hybrid rail service. Shortly thereafter, I-15 Bus. intersects County Route S14, and then interchanges with
California State Route 78 State Route 78 (SR 78) is a state highway in the U.S. state of California that runs from Oceanside, California, Oceanside east to Blythe, California, Blythe, traversing nearly the entire width of the state. Its western terminus is at Inter ...
(SR 78). The interchange is the last interchange on SR 78 before its freeway status ends, and there are only ramps for a westbound entrance or eastbound exit. Continuing north, I-15 Bus. intersects with El Norte Parkway, a major arterial road, before reconnecting with I-15 at exit 34 near the northern city limits of Escondido. Though the street itself continues northward well on into
Temecula Temecula (; , ; Luiseño: ''Temeekunga'') is a city in southwestern Riverside County, California, United States. The city had a population of 110,003 as of the 2020 census and was incorporated on December 1, 1989. The city is a tourist and ...
as a frontage road for I-15, its designation as I-15 Bus. ends at this interchange. Major intersections


Lake Elsinore business loop

Interstate 15 Business in
Lake Elsinore, California Lake Elsinore is a city in western Riverside County, California, United States. Established as a city in 1888, it is on the shore of Lake Elsinore, a natural freshwater lake about in size. The city has grown from a small resort town in the ...
, provides access to downtown Lake Elsinore as Main Street, Graham Avenue, Lakeshore Drive, and Lake Street. It also follows the former routing of SR 71. Major intersections


Norco business loop

Interstate 15 Business in
Norco, California Norco is a city in northwestern Riverside County, California, United States. Located roughly inland from the Pacific Ocean, Norco is known as "Horsetown, USA" and prides itself on being a "horse community". The area is dotted with corrals, far ...
, provides access to downtown Norco as Second Street, Hamner Avenue, and Sixth Street. It also follows the former routing of SR 31. Major intersections


Victorville business loop

Interstate 15 Business in
Victorville, California Victorville is a city in Victor Valley in San Bernardino County, California. Its population as of the 2020 census was 134,810. Victorville is the principal city of a Victor Valley–based urban area defined by the United States Census Bureau: ...
, provides access to downtown Victorville as Seventh Street and D Street. It also follows the former routing of US 66 and US 91. Major intersections


Barstow business loop

Interstate 15 Business in
Barstow, California Barstow is a city in San Bernardino County, California, in the Mojave Desert of Southern California. Located in the Inland Empire region of California, the population was 25,415 at the 2020 United States census, 2020 census. Barstow is an impor ...
, provides access to downtown Barstow as L Street and Main Street. It also follows the former routing of US 66. The northern terminus of I-15 Bus. is
Interstate 40 Interstate 40 (I-40) is a major east–west transcontinental Interstate Highway System, Interstate Highway in the Southeastern United States, southeastern and Southwestern United States, southwestern portions of the United States. At a leng ...
at exit 1, having the distinction of not ending at its interstate counterpart. The distinction is shared with Interstate 205 Business in the Tracy area in
Northern California Northern California (commonly shortened to NorCal) is a geocultural region that comprises the northern portion of the U.S. state of California, spanning the northernmost 48 of the state's List of counties in California, 58 counties. Northern Ca ...
, where its eastern terminus is with
Interstate 5 Interstate 5 (I-5) is the main north–south Interstate Highway System, Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels thro ...
. Unlike I-205 Bus. where it doesn't return to its interstate counterpart, I-15 Bus. does return to I-15, but continues to its northern end at I-40. Major intersections


Baker business loop

Interstate 15 Business in
Baker, California Baker is a census-designated place located in San Bernardino County, California, US. As of the 2020 census, the CDP had a total population of 442. Baker's ZIP Code is 92309 and the community is within area codes 442 and 760. History Baker w ...
, provides access to downtown Baker as Baker Boulevard. It also follows the former routing of US 91 and US 466. Major intersections


Mesquite business loop

Interstate 15 Business in
Mesquite, Nevada Mesquite is a city located in the northeast corner of Clark County, Nevada, Clark County, Nevada, United States adjacent to the Arizona state line and northeast of Las Vegas on Interstate 15 in Nevada, Interstate 15. As of the 2020 United State ...
, was also designated as State Route 144. It was removed as of December 31, 2005. It covered Mesquite Boulevard and Sandhill Boulevard in
Mesquite Mesquite is a common name for some plants in the genera ''Neltuma'' and '' Strombocarpa'', which contain over 50 species of spiny, deep-rooted leguminous shrubs and small trees. They are native to dry areas in the Americas. Until 2022, these ge ...
. The State Route designation was applied to the portion of Mesquite Boulevard from its southern crossing of
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
to Sandhill Boulevard, then along Sandhill Boulevard to its northern crossing of I-15. The route was long. Route 144, from SR 170 to Hillside Drive, was once US 91, which used to stretch from
Sweetgrass, Montana Sweet Grass is a census-designated place and unincorporated community in Toole County, Montana, United States, on the Canada–US border. It is the northern terminus of Interstate 15, an important route connecting western Canada, the western U ...
, to
Long Beach, California Long Beach is a coastal city in southeastern Los Angeles County, California, United States. It is the list of United States cities by population, 44th-most populous city in the United States, with a population of 451,307 as of 2022. A charter ci ...
.


St. George business loop

Interstate 15 Business in
St. George, Utah St. George or Saint George is a city in and the county seat of Washington County, Utah, United States. Located in southwestern Utah on the Arizona border, it is the principal city of the St. George metropolitan statistical area (MSA). The cit ...
, is the first business route along
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in the state of Utah. It runs from exit 6 north along Utah State Route 18 (SR-18, Bluff Street) to SR-34 (West St. George Boulevard), where it turns east until reaching exit 8.


Cedar City business loop

Interstate 15 Business in
Cedar City, Utah Cedar City is the largest city in Iron County, Utah, United States. Located south of Salt Lake City, it is north of Las Vegas on Interstate 15 in Utah, Interstate 15. Southern Utah University is located in Cedar City. It is the home of the Ut ...
, is the second business route along
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in the state of Utah. It runs from exit 57 north along SR-130 (Main Street), where it runs near
Southern Utah University Southern Utah University (SUU) is a public university in Cedar City, Utah, United States. Founded in 1897 as a normal school, Southern Utah University now has over 1,800 graduates each year with baccalaureate and other graduate degrees from its ...
and the Paiute Indian Reservation-Cedar City until reaching exit 62.


Parowan business loop

Interstate 15 Business (I-15 Bus.) in
Parowan, Utah Parowan ( ) is a city in and the county seat of Iron County, Utah, United States. The population was 2,790 at the 2010 census, and in 2018 the estimated population was 3,100. Parowan became the first incorporated city in Iron County in 1851. A ...
, is the third business route along
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in the state of Utah. It runs from exit 75 along SR-143, at first east on 200th Street, then north on South Main Street (Old US Highway 91) until SR-143 turns east onto East Center Street. I-15 Bus. then continues north along SR-274 (North Main Street) eventually serving as the western terminus of SR-271 near Parowan Airport until finally terminating at exit 78.


Beaver business loop

Interstate 15 Business in
Beaver, Utah Beaver is a city in, and county seat of, Beaver County in southwestern Utah, United States. The population was 3,592 at the 2020 census, up from the 2010 figure of 3,112. History Indigenous peoples lived in the area for thousands of years, ...
, is the fourth business route along
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in the state of Utah. It runs from exits 109 to 112 along SR-160.


Fillmore business loop

Interstate 15 Business in
Fillmore, Utah Fillmore is a city and the county seat of Millard County, Utah, United States. The population was 2,592 at the 2020 United States Census. It is named for the thirteenth U.S. President Millard Fillmore, who was in office when Millard County wa ...
, is the fifth business route along
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in the state of Utah. It runs from exits 163 to 167 along SR-99.


Holden business loop

The former Interstate 15 Business in
Holden, Utah Holden is a town in Millard County, Utah, United States. The population was 438 at the 2020 census. History Holden was settled in 1855 by a group of ten families sent out by the bishop of the local congregation of The Church of Jesus Christ ...
, served
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in the state of Utah. It ran from exit 174 at SR-64 to US 50 where it terminated at exit 178, the southern terminus of the I-15 / US 50 overlap.


Nephi business loop

Interstate 15 Business in the vicinity of
Nephi, Utah Nephi ( ) is a city in Juab County, Utah, United States. It is part of the Provo–Orem metropolitan area. The population was 6,443 at the 2020 census. It is the county seat of Juab County. It was settled by Mormon pioneers in 1851 as Salt C ...
, is the sixth business route along
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in the state of Utah. It runs from exits 222 to 228 along part of SR-28.


Payson business loop


Layton business loop

The former Interstate 15 Business in
Layton, Utah Layton ( /ˈleɪʔɪn/) is a city in Davis County, Utah, United States. It is part of the Ogden-Clearfield Metropolitan Statistical Area. As of the 2020 census, the city had a population of 81,773, with 2022 Census Bureau estimates showing an ...
, served
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in the state of Utah. It ran from exit 332 at SR-227 then turned onto to SR-106 where it terminated at exit 378, the southern terminus of the I-15 / US 50 overlap.


Brigham City business loop

Interstate 15 Business (I-15 Bus.) is a
business loop A business route (or business loop, business spur, or city route) in the United States is a short special route that branches off a parent numbered highway at its beginning, continues through the central business district of a nearby city or t ...
of
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in
Brigham City, Utah Brigham City is a city in Box Elder County, Utah, Box Elder County, Utah, United States. The population was 19,650 at the 2020 United States Census, 2020 census, up from the 2010 figure of 17,899. It is the county seat of Box Elder County. It l ...
, and is also concurrent with I-84 Bus. It runs from an interchange at exit 362 on I-15/I-84 at first along US 91 to the intersection with US 89 and SR-13. US 91 continues east along US 89, while I-15 Bus. / I-84 Bus. turn left to go north along SR-13 (South Main Street). Further in town, the road serves as the west end of
SR-90 Strontium-90 () is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 28.79 years. It undergoes β− decay into yttrium-90, with a decay energy of 0.546 MeV. Strontium-90 has applications in medicine and ...
. At Forest Street, South Main Street becomes North Main Street. North of there, SR-13 / I-15 Bus. / I-84 Bus. curves to the left onto Promontory Road, while North Main Street's designation is replaced by SR-38. From there, the routes run beneath a bridge for North 500th Street West and then another bridge for a Union Pacific Railroad line, eventually ending at a folded-diamond interchange with I-15/I-84 at exit 365, while SR-13 continues to run northwest through Corinne and points further north.


Tremonton business loop

Interstate 15 Business (I-15 Bus.) is a eastern business loop off of I-15 that passes through Elwood and
Tremonton, Utah Tremonton is a city in Box Elder County, Utah. The population was 9,894 at the time of the 2020 census. As of 2024, Tremonton has an estimated population of 13,713 and is one of the fastest growing municipalities in the state of Utah (2024 est ...
, and runs mostly along State Route 13 (SR-13) and State Route 102 (SR-102). It is the last
business route A business route (or business loop, business spur, or city route) in the United States is a short special route that branches off a parent numbered highway at its beginning, continues through the central business district of a nearby city or to ...
on I-15 in the state and is largely
concurrent Concurrent means happening at the same time. Concurrency, concurrent, or concurrence may refer to: Law * Concurrence, in jurisprudence, the need to prove both ''actus reus'' and ''mens rea'' * Concurring opinion (also called a "concurrence"), a ...
with I-84 Bus. I-15 Bus. begins at exit 376 on I-15 / Interstate 84 in Elwood and proceeds north along SR-13 (North 5200 West) to leave Elwood and, about later, enter Tremonton. Well beyond (east of) the developed areas of Tremonton, the three routes (I-15 Bus., I-84 Bus., and SR-13) reach an intersection with Utah State Route 102 (SR-102 / West Main Street) at Haws Corner Junction. At that intersection I-15 Bus. and I-84 Bus. both turn west onto SR-102. The three routes (I-15 Bus., I-84 Bus., and SR-02) continue west on West Main Street to connect with the southern end of Utah State Route 82 (North 300 East). Upon crossing Tremonton Street, the three routes transition from West Main Street to East Main Street. At 1000 West (Iowa String Road), I-15 Bus. turns north and leaves its
concurrency Concurrent means happening at the same time. Concurrency, concurrent, or concurrence may refer to: Law * Concurrence, in jurisprudence, the need to prove both ''actus reus'' and ''mens rea'' * Concurring opinion (also called a "concurrence"), a ...
with I-84 Bus. and SR-102. Proceeding north along North 1000 West (Iowa String Road) I-15 Bus. reaches West 1000 North. Shortly after turning west onto that street, I-15 Bus. reaches its northern terminus at I-15 (exit 378).


McCammon business loop

Interstate 15 Business (I-15 Bus.) has a length of through
McCammon, Idaho McCammon is a city in Bannock County, Idaho, United States. It is part of the Pocatello, Idaho Pocatello metropolitan area, Metropolitan Statistical Area'. The population was 825 at the 2020 United States census, 2020 census. In 1892, McCammon ...
, in central
Bannock County Bannock County is a county in the southeastern part of Idaho. As of the 2020 census, the population was 87,018, making it the sixth-most populous county in Idaho. The county seat and largest city is Pocatello. The county was established in 189 ...
. I-15 Bus. begins at I-15 exit 44 along Jensen Road, then turns north and follows State Street to the city of McCammon. Just north of the city limits, the business route veers onto Center Street and follows that through the center of town. At the north end of the city, I-15 Bus. turns west and runs concurrently with US 30 to its northern end at I-15 exit 47.


Inkom business loop

Interstate 15 Business (I-15 Bus.) runs for exactly through
Inkom, Idaho Inkom is a city in Bannock County, Idaho, Bannock County, Idaho. It is part of the Pocatello, Idaho Pocatello metropolitan area, Metropolitan Statistical Area. The population was 792 at the time of the 2020 United States census, 2020 census. It ...
, in northern
Bannock County Bannock County is a county in the southeastern part of Idaho. As of the 2020 census, the population was 87,018, making it the sixth-most populous county in Idaho. The county seat and largest city is Pocatello. The county was established in 189 ...
. I-15 Bus. mostly follows Old Highway 91 between exits 57 and 58, a pair of partial interchanges.


Pocatello business loop

Interstate 15 Business (I-15 Bus.) spans through
Pocatello, Idaho Pocatello () is the county seat of and the largest city in Bannock County, Idaho, Bannock County, with a small portion on the Fort Hall Indian Reservation in neighboring Power County, Idaho, Power County, containing the city's airport. It is t ...
, in northern
Bannock County Bannock County is a county in the southeastern part of Idaho. As of the 2020 census, the population was 87,018, making it the sixth-most populous county in Idaho. The county seat and largest city is Pocatello. The county was established in 189 ...
. I-15 Bus. begins at I-15 exit 67, where US 30 and US 91 also diverge from I-15. The business route and the U.S. Routes follow Fifth Avenue northwest. The routes split onto a
one-way pair A one-way pair, one-way couple, or couplet refers to that portion of a bi-directional traffic facilitysuch as a road, bus, streetcar, or light rail linewhere its opposing flows exist as two independent and roughly parallel facilities. Descriptio ...
of Fifth Avenue northbound and Fourth Avenue southbound. The highways pass by
Idaho State University Idaho State University (ISU) is a Public university, public research university in Pocatello, Idaho, United States. Founded in 1901 as the Academy of Idaho, Idaho State offers more than 250 programs at its main campus in Pocatello and locations ...
and through downtown Pocatello. At the north end of downtown, I-15 Bus. and the U.S. Routes veer north and converge as Pocatello Avenue. US 30 turns west at Oak Street; the business route and US 91 continue north along Yellowstone Avenue. I-15 Bus. leaves US 91 when it turns east onto Alameda Road, which becomes Pocatello Creek Road when it veers northeast to the business route's terminus at I-15 exit 71.


Blackfoot business loop

Interstate 15 Business (I-15 Bus.) has a length of through
Blackfoot, Idaho Blackfoot is a city in and the county seat of Bingham County, Idaho, United States. The population was 12,346 at the 2020 census. Blackfoot is the principal city of the Blackfoot, Idaho, Micropolitan Statistical Area, which includes Bingham C ...
, in central
Bingham County Bingham County is a county in the U.S. state of Idaho. As of the 2020 census, the population was 47,992. The county seat and largest city is Blackfoot. Bingham County comprises the Blackfoot, ID Micropolitan Statistical Area, which is includ ...
. I-15 Bus. begins at I-15 exit 89 near the northern end of the
Fort Hall Indian Reservation The Fort Hall Reservation is a Indian reservation, Native American reservation of the federally recognized Shoshone-Bannock people, Bannock Tribes (Shoshoni language: Pohoko’ikkateeCrum, B., Crum, E., & Dayley, J. P. (2001). Newe Hupia: Shosh ...
and follows US 91 northeast parallel to the
Union Pacific Railroad The Union Pacific Railroad is a Railroad classes, Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United Stat ...
. The highways cross the Blackfoot River into the city of Blackfoot along Broadway Street. In downtown Blackfoot, the routes veer onto Main Street, then I-15 Bus. turns northwest onto a one-way pair, Bridge Street northbound and Judicial Street southbound. The streets converge as Bridge Street, which the business route follows to its end at I-15 exit 93. The roadway continues beyond the interchange as US 26 and immediately crosses the
Snake River The Snake River is a major river in the interior Pacific Northwest region of the United States. About long, it is the largest tributary of the Columbia River, which is the largest North American river that empties into the Pacific Ocean. Begin ...
.


Idaho Falls business loop

Interstate 15 Business (I-15 Bus.) runs for through
Idaho Falls, Idaho Idaho Falls is the fourth most populous city in Idaho and the county seat of Bonneville County. It is the state's most populous city outside the Boise metropolitan area. As of the 2020 census, the population of Idaho Falls was 64,818.2020 Cen ...
, in western
Bonneville County Bonneville County is a county located in the U.S. state of Idaho. As of the 2020 census, the population was 123,964, making it the fourth-most populous county in Idaho and the most populous in eastern Idaho. Its county seat and largest city is ...
. I-15 Bus. begins at I-15 exit 116, which is also where US 26 diverges from the Interstate. The business route and U.S. Route follow Sunnyside Road across the Snake River to Yellowstone Avenue; this intersection forms the northern terminus of US 91. I-15 Bus. and US 26 follow Yellowstone Avenue northeast parallel to the Union Pacific Railroad into downtown Idaho Falls. At the intersection of Yellowstone Avenue and Broadway Street, I-15 Bus. turns northwest onto Broadway Street and runs concurrently with US 20 Bus. across another bridge over the Snake River to their mutual termini at I-15 exit 118. The roadway continues west as US 20.


Dillon business loop

Interstate 15 Business (I-15 Bus.) is a
business loop A business route (or business loop, business spur, or city route) in the United States is a short special route that branches off a parent numbered highway at its beginning, continues through the central business district of a nearby city or t ...
of
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in
Dillon, Montana Dillon is a city in and the county seat of Beaverhead County, Montana, Beaverhead County, Montana, United States. The population was 3,880 at the 2020 United States census, 2020 census. The city was named for Sidney Dillon (1812–1892), preside ...
. It runs from a diamond interchange at exit 62 along Atlantic Street, Helena Street and Montana Street to a brief overlap with Montana Highway 41 (MT 41) that ends at a trumpet interchange at exit 63. The I-15 Business Loop begins at exit 62 across from a road leading to the
Kiwanis International Kiwanis International ( ) is an international service club founded in 1915 in Detroit, Michigan. It is headquartered in Indianapolis, Indiana, United States, and is found in more than 80 nations and geographic areas. In 1987, the organization ...
-established Cornell Park, then, after crossing a bridge over an
Oregon Short Line Railroad The Oregon Short Line Railroad was a railroad in Wyoming, Idaho, Utah, Montana and Oregon in the United States. The line was organized as the Oregon Short Line Railway in 1881 as a subsidiary of the Union Pacific Railway. The Union Pacific int ...
line, curves north along Atlantic Street, briefly crossing another bridge overnight Blacktail Deer Creek. Between East Chapman and East Poindexter Streets, the route is joined by the former US 91. At Beaver County High School, I-15 Bus. makes a left turn onto Helena Street and, just before crossing the same OSR tracks it ran over earlier, makes a right turn onto Montana Street. Moving away from Downtown Dillon, Former US 91 branches off to the northwest, then across from the intersection with Ramshorn Street, the road turns west onto a wrong way concurrency with MT 41. I-15 Bus. / MT 41 climbs a bridge over former US 91 as well as the OSR line and Blacktail Deer Creek all at once, then makes a southbound curve before finally ending at a trumpet interchange at exit 63.


Butte business loop

Interstate 15 Business (I-15 Bus.) is a
business loop A business route (or business loop, business spur, or city route) in the United States is a short special route that branches off a parent numbered highway at its beginning, continues through the central business district of a nearby city or t ...
of
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in
Butte, Montana Butte ( ) is a consolidated city-county and the county seat of Silver Bow County, Montana, United States. In 1977, the city and county governments consolidated to form the sole entity of Butte-Silver Bow. The city covers , and, according to the 2 ...
. It runs from a flyover interchange at exit 124 on I-90 at I-115 to a partial cloverleaf interchange with MT 2 at exit 127. Beside I-115, I-15 Bus. is also concurrent with I-90 Bus.


Helena business loop

Interstate 15 Business (I-15 Bus.) is a
business loop A business route (or business loop, business spur, or city route) in the United States is a short special route that branches off a parent numbered highway at its beginning, continues through the central business district of a nearby city or t ...
of
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in the capital city of
Helena, Montana Helena (; ) is the List of capitals in the United States, capital city of the U.S. state of Montana and the county seat, seat of Lewis and Clark County, Montana, Lewis and Clark County. Helena was founded as a gold camp during the Montana gold ...
. It runs west from exit 192 along US 12 in Montana at the east end of a one-way pair along Prospect Avenue westbound and 11th Avenue eastbound. At North Montana Avenue, both US 12 and I-15 Bus. turn north, but US 12 curves west onto East Lyndale Avenue between Boulder Avenue and Helena Avenue, and I-15 Bus. follows along this curve, while North Montana Avenue continues north as Lewis and Clark County Road 229. At North Last Chance Gulch, I-15 Bus. turns north-northeast while US 12 continues west along West Lyndale Avenue and I-15 Bus. passes between Centennial Park and Memorial Park, the grounds of the stadium used by the
Helena Brewers The Helena Brewers were a Minor League Baseball team in the Pioneer League located in Helena, Montana, from 1978 to 2018. The team played their home games at Kindrick Legion Field, which was built in 1939. They were affiliated with the Milwaukee ...
. After crossing a bridge over a former
Northern Pacific Railroad The Northern Pacific Railway was an important American transcontinental railroad that operated across the northern tier of the Western United States, from Minnesota to the Pacific Northwest between 1864 and 1970. It was approved and chartered b ...
line, I-15 Bus. begins to turn northeast and then, at the intersection of North Montana Avenue, becoming Cedar Street running east, eventually ending at I-15 on exit 193 across from the
Helena Regional Airport Helena Regional Airport is a public airport two miles northeast of Helena, in Lewis and Clark County, Montana, United States. It is owned by the Helena Regional Airport Authority. The National Plan of Integrated Airport Systems for 2011–201 ...
.


Great Falls business loop

Interstate 15 Business (I-15 Bus.) in
Great Falls, Montana Great Falls is the List of cities and towns in Montana, third most populous city in the U.S. state of Montana and the county seat of Cascade County, Montana, Cascade County. The population was 60,442 according to the 2020 United States census, 2 ...
, links I-15, which bypasses downtown Great Falls to the west, to the center of Great Falls. As its business loop designation implies, I-15 Bus. terminates at I-15 (
concurrent Concurrent means happening at the same time. Concurrency, concurrent, or concurrence may refer to: Law * Concurrence, in jurisprudence, the need to prove both ''actus reus'' and ''mens rea'' * Concurring opinion (also called a "concurrence"), a ...
with US 89 and MT 200 through western Great Falls) at each end. The southernmost of the route, from the interchange with I-15 to Fox Farm Road, is designated, but not signed, as Interstate 315. It is the second shortest Interstate in the country, the shortest being I-878.


Conrad business loop

Interstate 15 Business is a
business loop A business route (or business loop, business spur, or city route) in the United States is a short special route that branches off a parent numbered highway at its beginning, continues through the central business district of a nearby city or t ...
of
I-15 I15 may refer to: * Interstate 15, a north–south Interstate Highway in the United States of America * Polikarpov I-15, a Soviet fighter aircraft * I15 (band), a band * , of the Imperial Japanese Navy * Älvsborg Regiment The Älvsborg Regiment ...
in
Conrad, Montana Conrad is a city in and the county seat of Pondera County, Montana, United States. The population was 2,318 at the 2020 census. Each June, the Whoop Up Days, a town wide celebration that includes a parade and rodeo, takes place in Conrad. The ...
. It runs along Old Highway 91 from diamond interchanges at exit 335 and exit 339. The north end was originally a half-diamond/trumpet interchange until it was rebuilt in the 2010s, and was given a rest area / truck weigh station east of the interchange.


Shelby business loop

Interstate 15 Business (I-15 Bus.) in
Shelby, Montana Shelby is a city in and the county seat of Toole County, Montana, Toole County, Montana, United States. The population was 3,169 at the 2020 United States census, 2020 census. History Shelby was named in honor of Peter O. Shelby, General Manag ...
, links I-15, which bypasses downtown Shelby to the west, to the center of Shelby. The southern terminus of I-15 Bus. is at exit 363 on I-15; from there it follows US 2 into the center of Shelby, then follows Montana Highway 67 (Oilfield Road) across the railyard and through the north end of town to its northern terminus at exit 364 on I-15, just south of Shelby Airport.


See also


References


External links


Interstate Business Route 15 (InterstateGuide.com)
{{I-15 aux 15 Interstate 15