View source for List of Interstate Highways in Alaska

{{Short description|None}}
{{Use mdy dates|date=January 2023}}
{{Use American English|date=January 2023}}
{{Infobox state highway system
|title= Dwight D. Eisenhower National System of Interstate and Defense Highways
|shields={{infobox road/shieldmain/USA|state=AK|type=I|route=1}}{{infobox road/shieldmain/USA|state=AK|type=I|route=2}}{{infobox road/shieldmain/USA|state=AK|type=I|route=3}}{{infobox road/shieldmain/USA|state=AK|type=I|route=4}}
|caption=Shields for Interstates in Alaska
|map={{maplink-road|from=List of Interstate Highways in Alaska.map|zoom=3}}
|map_custom=yes
|map_notes=Interstates of Alaska highlighted in red
|formed=1976
|length_mi=1082.22
|length_ref=<ref name="fhwa-log">{{cite web |last=Starks |first=Edward |date=January 27, 2022 |title=Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways |url=https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table01.cfm |access-date=January 24, 2023 |work=FHWA Route Log and Finder List |publisher=[[Federal Highway Administration]]}}</ref>
|interstate=Interstate A-n (A-n) (unsigned)
|statehwy=Alaska Route n (AK-n)
|links=AK
}}

The '''Interstate Highways in Alaska''' are all owned and maintained by the US state of [[Alaska]].<ref>{{cite web |url=https://highways.dot.gov/highway-history/interstate-system/50th-anniversary/interstate-frequently-asked-questions |title=Interstate Frequently Asked Questions |author= Staff |publisher= [[Federal Highway Administration]] |access-date=May 31, 2012}}</ref> The [[Alaska Department of Transportation & Public Facilities]] (DOT&PF) is responsible for the maintenance and operations of the [[Interstate Highway]]s. The Interstate Highway System in Alaska comprises four highways that cover {{convert|1082.22|mi|km}}. The longest of these is Interstate&nbsp;A-1 (A-1), at {{convert|408.23|mi|km}} long, while the shortest route is A-3, at {{convert|148.12|mi|km}} long. All Interstates in Alaska are unsigned<ref name="rambler">{{cite web |last= Weingroff |first= Richard F. |date= April 7, 2011 |url=https://highways.dot.gov/highway-history/general-highway-history/rambler/ask-rambler-interstates-hawaii-are-we-crazy |title= Interstates in Hawaii: Are We Crazy??? |work= Ask the Rambler |publisher= Federal Highway Administration |access-date= March 15, 2011}}</ref> {{fv|date=April 2023}} and are not generally referred to by their highway numbers.

Interstates in Alaska follow the numbering system Interstate A-n, where n represents the number of the Interstate. This follows the similar numbering systems for [[List of state highways in Hawaii|Hawaii]] and [[List of highways in Puerto Rico|Puerto Rico]].<ref name="fhwa-log"/> The Interstate Highway System was expanded to Alaska in 1976, by the Federal-Aid Highway Act of 1976, which defined the system for Interstates in Alaska and Puerto Rico under {{uscsub|23|103|c|1|B|ii}}.<ref name="Title 23">{{cite web |author=United States Congress |publisher=U.S. Government Printing Office |url=http://www.gpo.gov/fdsys/pkg/USCODE-1994-title23/html/USCODE-1994-title23-chap1-sec103.htm |title=Title 23, Chapter 1, Section §103 |access-date=May 31, 2012}}</ref>

Most of the lengths of the Interstates in Alaska are not constructed to [[Interstate Highway standards]] but are small, rural, two-lane [[undivided highway]]s. Title 23 provides that "Highways on the Interstate System in Alaska and Puerto Rico shall be designed in accordance with such geometric and construction standards as are adequate for current and probable future traffic demands and the needs of the locality of the highway."<ref name="Title 23"/> Some portions of these highways are built to Interstate standards, though. The [[Seward Highway]], part of A-3, is built to freeway standards in [[Anchorage, Alaska|Anchorage]].<ref name="Googlemaps A-3"/> The [[Glenn Highway]], which is part of A-1, is built to freeway standards from Anchorage to [[Wasilla, Alaska|Wasilla]].<ref name="Googlemaps A-1"/> A very small portion of the [[George Parks Highway]], A-4, is constructed to freeway standards in Wasilla.<ref name="Googlemaps A-4"/> In and around [[Fairbanks, Alaska|Fairbanks]], the [[Richardson Highway]], part of A-2, is constructed to freeway standards.<ref name="Googlemaps A-2"/> In addition to these highways, the [[Johansen Expressway]], in Fairbanks, and the [[Minnesota Drive Expressway]], in Anchorage, are constructed to expressway standards. 
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==Routes==
{{routelist top|length_ref=<ref name="fhwa-log" />}}
{{routelist row
| state = AK
| type = I
| route = 1
| nolink = y
| sortkey = 1
| length_mi = 408.23
| terminus_a = [[Anchorage, Alaska|Anchorage]]
| terminus_b = [[Canada–United States border|Canadian border]] in [[Alcan Border, Alaska|Alcan Border]]
| notes = [[Glenn Highway#Interstate Highway System|Glenn Highway]], [[Richardson Highway#Interstate Highway System|Richardson Highway]], [[Tok Cut-Off]], [[Alaska Highway#Interstate Highway System|Alaska Highway]]<ref name="AADT Central">{{cite report |first= Jennifer W. |last= Witt |year= 2010 |title= Annual Traffic Volume Report |edition= 2008-2009-2010 |url= http://www.dot.state.ak.us/stwdplng/mapping/trafficmaps/trafficdata_reports_cen/2010_ATVR_FINAL_All_Posted.pdf |publisher= [[Alaska Department of Transportation & Public Facilities]] |access-date= March 15, 2012 |url-status= dead |archive-url= https://web.archive.org/web/20140330090745/http://www.dot.state.ak.us/stwdplng/mapping/trafficmaps/trafficdata_reports_cen/2010_ATVR_FINAL_All_Posted.pdf |archive-date= March 30, 2014 }}</ref><ref name="AADT North">{{cite report|first=Ethan |last=Birkholz |year=2010 |title=Annual Traffic Volume Report |edition=2008-2009-2010 |url=http://www.dot.alaska.gov/stwdplng/mapping/trafficmaps/trafficdata_reports_nor/NRVolumeRpt2008-10.pdf |archive-url=https://web.archive.org/web/20140417104824/http://www.dot.alaska.gov/stwdplng/mapping/trafficmaps/trafficdata_reports_nor/NRVolumeRpt2008-10.pdf |url-status=dead |archive-date=April 17, 2014 |publisher=[[Alaska Department of Transportation & Public Facilities]] |access-date=May 31, 2012 }}</ref><ref name="Interstate Maps">{{cite web |author=Federal Highway Administration |publisher=U.S. Department of Transportation |url=http://www.dot.alaska.gov/stwdplng/transdata/routelists/interstate_mapset2006final.pdf |archive-url=https://web.archive.org/web/20140417115322/http://www.dot.alaska.gov/stwdplng/transdata/routelists/interstate_mapset2006final.pdf |url-status=dead |archive-date=April 17, 2014 |title=Dwight D. Eisenhower Interstate Routes Statewide |access-date=May 31, 2012}}</ref><ref name="Interstate List">{{cite web |author=Federal Highway Administration |publisher=U.S. Department of Transportation |url=http://www.dot.alaska.gov/stwdplng/transdata/routelists/interstate_2008_10.pdf |archive-url=https://web.archive.org/web/20140417105602/http://www.dot.alaska.gov/stwdplng/transdata/routelists/interstate_2008_10.pdf |url-status=dead |archive-date=April 17, 2014 |title=Alaska Department of Transportation and Public Facilities Routes by Description: CDS Route Numbers as of 28 October 2008 |access-date=May 31, 2012}}</ref>
| established = 1976
| length_ref = <ref name="Googlemaps A-1">{{Google Maps|url=https://maps.google.com/maps?f=d&source=s_d&saddr=Ingra+St&daddr=Tok+Cutoff&geocode=FUQXpgMdMDYR9w%3BFRBnxgMdYCl69w&abauth=4fc70310hxhHgyanr2dWt8YFXnPtQL9RvnU&vps=5&ei=XgTHT42MD4byM8H6pdEI&jsv=417c&sll=63.31885,-143.036499&sspn=0.367521,0.883026&vpsrc=0&hl=en&mra=ls&num=10&mid=1338442857|title=Overview Map of Interstate A-1|access-date=May 31, 2012}}</ref>
}}
{{routelist row
| state = AK
| type = I
| route = 2
| nolink = y
| sortkey = 2
| length_mi = 202.18
| terminus_a = [[Tok, Alaska|Tok]]
| terminus_b = [[Fairbanks, Alaska|Fairbanks]]
| notes = [[Alaska Highway#Interstate Highway System|Alaska Highway]], [[Richardson Highway#Interstate Highway System|Richardson Highway]]<ref name="AADT North"/><ref name="Interstate Maps"/><ref name="Interstate List"/>
| established = 1976
| length_ref = <ref name="Googlemaps A-2">{{Google Maps|url=https://maps.google.com/maps?f=d&source=s_d&saddr=AK-2+E&daddr=AK-2+W&geocode=FSUV3QMd6z4y9w%3BFZ5wuwMdjHqY9w&abauth=4fc7046dyoFto1TE_LXSviaNLQFweuvSBI8&vps=5&ei=UAXHT6yaH4_OMIy_mfgO&jsv=417c&sll=64.812872,-147.732296&sspn=0.043541,0.110378&vpsrc=6&hl=en&mra=ls&num=10&mid=1338443098|title=Overview Map of Interstate A-2|access-date=May 31, 2012|link=no}}</ref>
}}
{{routelist row
| state = AK
| type = I
| route = 3
| nolink = y
| sortkey = 3
| length_mi = 148.12
| terminus_a = [[Soldotna, Alaska|Soldotna]]
| terminus_b = [[Anchorage, Alaska|Anchorage]]
| notes = [[Seward Highway#Interstate Highway System|Seward Highway]], [[Sterling Highway#Interstate Highway System|Sterling Highway]]<ref name="AADT Central"/><ref name="Interstate Maps"/><ref name="Interstate List"/>
| established = 1976
| length_ref = <ref name="Googlemaps A-3">{{Google Maps|url=https://maps.google.com/maps?f=d&source=s_d&saddr=AK-1+N&daddr=Ingra+St&geocode=FevymgMd5Qz_9g%3BFUQXpgMdMDYR9w&abauth=4fc6f6fff2elbK6k1q8jIlmQizuw4hd0kLw&vps=5&ei=AwPHT-LjIJLcM42PlfgI&jsv=417c&sll=61.215499,-149.85918&sspn=0.012316,0.027595&vpsrc=0&hl=en&mra=ls&num=10&mid=1338442508|title=Overview Map of Interstate A-3|access-date=May 31, 2012|link=no}}</ref>
}}
{{routelist row
| state = AK
| type = I
| route = 4
| nolink = y
| sortkey = 4
| length_mi = 323.69
| terminus_a = [[Gateway, Alaska|Gateway]], {{nowrap|near [[Palmer, Alaska|Palmer]]}}
| terminus_b = [[Fairbanks, Alaska|Fairbanks]]
| notes = [[George Parks Highway#Interstate Highway System|Parks Highway]]<ref name="AADT Central"/><ref name="AADT North"/><ref name="Interstate Maps"/><ref name="Interstate List"/>
| established = 1976
| length_ref = <ref name="Googlemaps A-4">{{Google Maps|url=https://maps.google.com/maps?f=d&source=s_d&saddr=AK-2+E&daddr=Interstate+a-4+E&geocode=FSUV3QMd6z4y9w%3BFfMRqwMdoJga9w&abauth=4fc7055e0FVP1QE0bsLT8bZtLjNwhY8eC9c&vps=5&ei=6AXHT_7YEZ7GMoP1sfgI&jsv=417c&sll=61.604437,-149.251328&sspn=0.194617,0.441513&vpsrc=6&hl=en&mra=ls&num=10&mid=1338443251|title=Overview Map of Interstate A-4|access-date=May 31, 2012|link=no}}</ref>
}}
{{routelist bottom}}

==Gallery==
<gallery mode="packed">
File:Glenn Highway and Mount Drum.jpg|The [[Glenn Highway]], eastbound near [[Glennallen, Alaska|Glennallen]], is part of A-1.
File:Richardson Highway Badger Road Interchange.jpg|An interchange between the [[Richardson Highway]], part of A-2, and Badger Road in [[Fairbanks]]
File:Highway, bay, and mountains, Alaska.jpg|The [[Sterling Highway]], westbound near [[Homer, Alaska|Homer]], is part of A-3.
File:Parks Highway to Fairbanks.jpg|The [[George Parks Highway]], which comprises the entirety of A-4
</gallery>

==See also==
*{{Portal-inline|Alaska}}
*{{Portal-inline|U.S. roads}}

==References==
{{Reflist}}

==External links==
{{Commons category|Interstate Highways in Alaska}}
{{Attached KML|display=inline,title}}
* [http://www.alaskaroads.com/Interstate-ends.htm Photos of Alaska Interstate Highway ends]
* [https://www.aaroads.com/interstate-guide/alaska/ Alaska Interstates] at AARoads' Interstate Guide

{{Interstates}}

[[Category:Interstate Highways in Alaska| ]]
[[Category:Lists of roads in Alaska|Interstate]]
[[Category:Lists of Interstate Highways|Alaska]]