Editing Interstate 15 (section)

{{Short description|Interstate in the Western United States}}
{{Use American English|date=April 2025}}
{{Use mdy dates|date=March 2017}}
{{Infobox road
|country=USA
|type=I
|route=15
|map={{maplink|frame=yes|plain=yes|frame-align=center|frame-width=290|frame-height=290|type=line|from=Interstate 15.map}}
|map_custom=yes
|map_notes=I-15 highlighted in red
|length_mi=1433.52
|length_round=2
|length_ref=<ref name="USDOT">{{cite web |url = https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/?redirect |title = Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of October 31, 2002 |date = October 31, 2002 |publisher = [[Federal Highway Administration]] |access-date = July 20, 2011 |archive-date = May 27, 2012 |archive-url = https://archive.today/20120527023005/http://www.fhwa.dot.gov/reports/routefinder/table1.htm |url-status = live }}</ref>
|established=1957
|direction_a=South
|terminus_a={{jct|country=USA|state=CA|I|8|SR|15|nolink2=yes}} in [[San Diego|San Diego, CA]]
|junction=<!-- Major Interstate junctions only; Only 5-8 most major intersections and cities belong here; please read [[WP:USRD/STDS]] for more info -->
*{{jct|country=USA|I|10}} in [[Ontario, California|Ontario, CA]]
*{{jct|country=USA|I|40}} in [[Barstow, California|Barstow, CA]]
*{{jct|country=USA|I|11|US|93|US|95}} in [[Las Vegas, Nevada|Las Vegas, NV]]
*{{jct|country=USA|I|70}} near [[Cove Fort, Utah|Cove Fort, UT]]
*{{jct|country=USA|I|80}} in [[Salt Lake City|Salt Lake City, UT]]
*{{jct|country=USA|I|84|dab1=Oregon-Utah}} from [[Riverdale, Utah|Riverdale, UT]] to [[Tremonton, Utah|Tremonton, UT]]
*{{jct|country=USA|I|86|dab1=Idaho}} in [[Chubbuck, Idaho|Chubbuck, ID]]
*{{jct|country=USA|I|90}} near [[Butte, Montana|Butte, MT]]
|direction_b=North
|terminus_b={{Jct|province=AB|Hwy|4}} at [[Sweetgrass–Coutts Border Crossing]] at [[Sweet Grass, Montana|Sweet Grass, MT]]
|states=[[California]], [[Nevada]], [[Arizona]], [[Utah]], [[Idaho]], [[Montana]]
}}

'''Interstate&nbsp;15''' ('''I-15''') is a major [[Interstate Highway System|Interstate Highway]] in the [[Western United States]], running through [[Southern California]] and the [[Intermountain West]]. I-15 begins near the [[Mexico–United States border|Mexican border]] in [[San Diego County, California|San Diego County]] and stretches north to [[Alberta|Alberta, Canada]], passing through the states of [[California]], [[Nevada]], [[Arizona]], [[Utah]], [[Idaho]], and [[Montana]]. The Interstate serves the cities of [[San Diego]], [[San Bernardino]], [[Las Vegas]], [[Salt Lake City]], [[Idaho Falls, Idaho|Idaho Falls]], and [[Great Falls, Montana|Great Falls]]. It also passes close to the urban areas of [[Los Angeles County|Los Angeles]], [[Orange County, California|Orange]], and [[Riverside County|Riverside]] counties in California. The stretches of I-15 in Idaho,{{cn|date=October 2024}} Utah, and Arizona have been designated as the "Veterans Memorial Highway".<ref>{{cite web | last=Trishman | first=Robert | title=I-15 rededicated as Veterans Memorial Highway | website=Deseret News | date=February 10, 2012 | url=https://www.deseret.com/2012/2/10/20392593/i-15-rededicated-as-veterans-memorial-highway/ | access-date=October 26, 2024}}</ref><ref>{{cite web | title=Arizona highways honor veterans all year long | website=Department of Transportation | date=November 10, 2016 | url=https://azdot.gov/blog-article/arizona-highways-honor-veterans-all-year-long | access-date=October 26, 2024}}</ref> The southern end is at a junction with [[Interstate 8|I-8]] and [[Interstate 15 in California|State Route&nbsp;15]] (SR&nbsp;15) in San Diego, and the northern end is at a connection with [[Alberta Highway 4]] at the [[Sweetgrass–Coutts Border Crossing]].

I-15 was built to connect the [[Inland Empire]] with San Diego in California, facilitate tourism access to Las Vegas, provide access to the [[Arizona Strip]], interconnect all of the [[metropolitan statistical area]]s in Utah except for [[Logan, Utah|Logan]], and provide freeway bypasses for [[Pocatello, Idaho|Pocatello]], Idaho Falls, and Great Falls. Since its creation, I-15 has served as a long-haul route for [[North America]]n commerce. It is now officially chartered for this purpose: from the junction of [[Interstate 11|I-11]] in [[Las Vegas]] to the [[Canada–United States border|Canadian border]], I-15 forms part of the [[CANAMEX Corridor]], a [[Intermodal Surface Transportation Efficiency Act|High Priority Corridor]], as a result of the [[North American Free Trade Agreement]].<ref name=canamex>{{cite web |url = http://www.canamex.org/ |title = CANAMEX CORRIDOR, The safe, smart and secure corridor |access-date = January 2, 2008 |publisher = Canamex Corridor Project |archive-url = https://web.archive.org/web/20080101020328/http://www.canamex.org/ |archive-date = January 1, 2008 |url-status = dead }}</ref> Since the construction of I-15, California, Idaho, Nevada, and Utah have consistently ranked in the fastest-growing areas of the United States. As a result, the route of I-15 has substantially increased in population and commuter traffic.