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List of Interstate Highways in Arizona

The Interstate Highways in Arizona are the segments of the Dwight D. Eisenhower System of Interstate and Defense Highways that are owned and maintained by the U.S. state of Arizona, totaling about 1,169 miles (1,881 km).[1] Arizona has a total of six Interstate Highways, all of which are mainline highways; there are no auxiliary highways. The longest Interstate in Arizona is Interstate 10 (I-10), which traverses east-west through the southern and central parts of the state, serving Phoenix. There are also a total of fourteen active business routes and eight former routes, which were either business loops or spurs for all main highways except I-15. All of Arizona's existing Interstate Highways have overtaken or replaced some U.S. Routes, which either involved decommissioning or running concurrent with the existing route.

Interstate Highways of the Arizona State Highway System

Interstate 8 marker

Interstate 10 marker

Interstate 40 Business marker

Example signage from Arizona's Interstate System
Map
Interstate Highways highlighted in red
Active business routes highlighted in blue
System information
Maintained by ADOT
Length1,169.17 mi[1] (1,881.60 km)
Business Routes not included
Formed1957
Highway names
InterstatesInterstate X (I-X)
US HighwaysU.S. Route X (US X)
StateState Route X (SR X)
System links
  • Arizona State Highway System

The Arizona Department of Transportation (ADOT) is the agency responsible for building and maintaining the Interstate Highways in the Arizona State Highway System. These highways are built to Interstate Highway standards, which are freeways that have a 75-mile-per-hour (121 km/h) speed limit in rural areas and a 65 mph (105 km/h) speed limit in urban areas.[2] The numbering scheme used to designate the Interstates was developed by the American Association of State Highway and Transportation Officials (AASHTO), an organization composed of various state departments of transportation in the United States.

Description

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The Interstate Highway System currently covers 1,169 miles (1,881 km) of interstate highway in Arizona, which only consists of primary highways, which are the two-digit routes and I-8. There are no auxiliary interstates within the state, which are three-digit routes. The only auxiliary Interstate that has existed in Arizona was I-410, which was an inner loop route in Phoenix. It later became part of I-10 as I-10 was rerouted and the old route became part of I-17. The longest Interstate in Arizona is I-10, which spans 392.33 miles (631.39 km)[1] across southern and central Arizona, and the shortest Interstate is I-15, which only traverses the northwestern corner of the state, running from Nevada to Utah, spanning only 29.39 miles (47.30 km). I-11 is a proposed Interstate that is currently in its planning phase and is expected to run from the Hoover Dam to Nogales. It is planned to overtake U.S. Route 93 (US 93).There are also 14 active business routes within the state. All current Interstate Highways have had business routes except for I-15, which never had a business route designated. I-17's only business route located in Black Canyon City was decommissioned in 2011, joining I-15 as the only two routes without a business route.

List

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NumberLength (mi)[1]Length (km)Southern or western terminusNorthern or eastern terminusFormedRemovedNotes
I-8178.33286.99I-8 at the California state lineI-10 in Casa Grande01958-01-011958[3]currentReplaced US 80 and SR 84
I-10392.33631.39I-10 at the California state lineI-10 at the New Mexico state line01960-01-011960[4]currentReplaced US 60, US 70, SR 93, SR 84, US 80 and SR 86
I-11——I-19 BL in NogalesI-11/US 93 at the Nevada state lineproposed—Will replace US 93 and I-19
I-1529.3947.30I-15 at the Nevada state lineI-15 at the Utah state line01962-01-011962[5]currentReplaced US 91
I-17145.76234.58I-10 / US 60 in PhoenixI-40 in Flagstaff01957-01-011957[6]currentReplaced US 89, SR 79 and SR 69
I-1963.35101.95I-19 BL in NogalesI-10 at Tucson01963-01-011963[7]currentReplaced US 89 and SR 93
I-40359.48578.53I-40 at the California state lineI-40 at the New Mexico state line01962-01-011962[7]currentReplaced US 66 and US 89
I-4100.65[8]1.05I-10 in PhoenixBuckeye Road in Phoenix01969-01-011969[9]01971-01-011971[10]Renumbered I-10; former I-10 became an extended I-17.
I-5100.65[8]1.05I-10 in PhoenixBuckeye Road in Phoenix01958-01-011958[11]01969-01-011969[9]Renumbered SR 51.
I-710——I-10 in TucsonI-10 in Tucson01971-01-01197101982-01-011982Proposed, but it never materialized; what would have been I-710 became today's Kino Parkway.
  •       Former
  •       Proposed and unbuilt

Business routes

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All state designated Interstate Business Loops are internally designated as State Route Business Loops by ADOT, being referred to throughout ADOT ArcGIS data and state highway logs as such.[12] For example, all currently state designated I-10 Business Loops in Arizona are referred to as "SB010" which is the Arizona Transportation Information System (ATIS) code for "State Business Route 10" or "SR 10B" for short.[12][13]

NumberLength (mi)[1]Length (km)Southern or western terminusNorthern or eastern terminusFormedRemovedNotes
BL 812.2319.68I-8 Bus. at the California state lineI-8 east of Yuma01966-01-011966[14]currentFormer US 80[15]
BL 85.969.59I-8 west of Gila BendI-8 east of Gila Bend01973-01-011973[16]currentFormer US 80 and SR 84[15]
BL 102.914.68I-10 west of QuartzsiteI-10 east of Quartzsite01974-01-011974[17]currentFormer US 60/US 70[15]
BL 10——I-10 at 27th Avenue in PhoenixI-10 at 48th Street in Phoenix—01990-01-011990
BL 105.75[7]9.25I-10 and Park Avenue in TucsonI-10 east of Tucson01972-01-011972[18]02001-01-012001[19]Former US 80/SR 86[15]
BL 103.515.65I-10 west of BensonI-10 east of Benson01974-01-011974[20]currentFormer US 80/SR 86[15]
BS 100.55[7]0.89I-10 north of BensonI-10 BL in Benson01969-01-011969[21]01999-01-011999[22]Ocotillo Road in Benson
BL 108.3313.41I-10 west of WillcoxI-10 east of Willcox01974-01-011974[23]currentFormer US 666/SR 86[15]
BL 104.417.10I-10 west of BowieI-10 east of Bowie01974-01-011974[24]currentFormer SR 86[15]
BL 103.906.28I-10 west of San SimonI-10 east of San Simon01974-01-011974[25]currentFormer SR 86[15]
BL 173.004.83I-17 in Black Canyon CityI-17 in Black Canyon City—02011-01-012011Former SR 69[15]
BL 195.889.46I-19 north of NogalesFed. 15 at the Mexican border01992-01-011992[26]currentFormer US 89/SR 93[15]
BL 1920.24[7]32.57I-19 in Green ValleyI-10 in South Tucson01992-01-011992[27]02004-01-012004[28]Former US 89/SR 93[15]
BL 400.55[a]0.89I-40/US 93 west of KingmanI-40/US 93 east of Kingman01984-01-011984[29]02009-01-012009[30]Former US 66/US 93[15]
BL 404.256.84I-40 southwest of SeligmanI-40 southeast of Seligman01984-01-011984[31]currentSection of the route is former US 66[15]
BL 401.492.40I-40 west of Ash ForkI-40/SR 89 east of Ash Fork01984-01-011984[32]currentFormer US 66/US 89[15]
BL 403.986.41I-40 west of WilliamsI-40/SR 64 east of Williams01984-01-011984[32]01990-01-011990Former US 66/US 89[15]
BL 409.6715.56I-40 west of FlagstaffI-40/US 180 in Flagstaff01988-01-011988[32]currentFormer US 66/US 89[15]
BL 400.87[33]1.40I-40 BL/US 180 in FlagstaffI-40/US 180 east of Flagstaff02002-01-012002[34]02008-01-012008[35]Former US 66/US 180[15]
BL 403.63[36]5.84I-40/US 180/SR 99 west of WinslowI-40/US 180/SR 87 east of Winslow01980-01-011980[37]02007-01-012007[33]Former US 66/US 180[15]
BS 401.201.93SR 99 (3rd Street) in WinslowWinslow Industrial Spur west of Winslow01974-01-011974[38]currentFormer US 66/US 180[15]
BL 406.8310.99I-40/US 180 west of Joseph CityI-40/US 180 east of Joseph City01984-01-011984[39]currentFormer US 66/US 180[15]
BL 4015.4724.90I-40/US 180 west of HolbrookI-40/SR 77 east of Holbrook01984-01-011984[39]currentFormer US 66[15]
  •       Former

See also

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Notes

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  1. ^ Only the beginning and ending segments of BL 40 were maintained by ADOT at the very end of its existence, hence the low recorded mileage.

References

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  1. ^ a b c d e Arizona Department of Transportation. "2008 ADOT Highway Log" (PDF). Arizona Department of Transportation. Retrieved April 30, 2008.
  2. ^ "Maximum posted speed limits by state". Insurance Institute for Highway Safety. Retrieved August 17, 2021.
  3. ^ Planning Survey Division (July 1, 1965). "1965-1966 Arizona Highway Sufficiency Rating; Route Log Showing Sufficiency Ratings For Each Section" (PDF). Arizona State Highway Department. Retrieved June 27, 2023 – via Arizona Memory Project.
  4. ^ Harelson, Hugh (December 4, 1960). "$3 Million Road Budget Explained". Arizona Republic. Phoenix. p. 17. Retrieved October 6, 2018 – via Newspapers.com.
  5. ^ Arizona Department of Transportation (February 28, 2015). "Arizona State Highway System Bridge Record" (PDF). Arizona Department of Transportation. Retrieved September 10, 2016.
  6. ^ Nothaft, Mark (February 21, 2017). "Which freeway came first in the Valley?". Arizona Republic. Retrieved June 18, 2019 – via AZCentral.com.
  7. ^ a b c d e Arizona Department of Transportation (December 15, 1999). "1998 State Highway System Log" (PDF). Arizona Department of Transportation. Retrieved June 10, 2019.
  8. ^ a b "NETRonline: Historic Aerials - Viewer". NETR Online. Tempe, Arizona: Nationwide Environmental Title Research, LLC. September 10, 2018. Retrieved September 10, 2018.
  9. ^ a b Breyer, Joe. "Arizona DOT Right-of-Way Resolution 1962-151". Arizona Highway Data. Works Consulting, LLC. Retrieved March 6, 2016.
  10. ^ Arizona Department of Transportation (1971). ADOT Road Map of Arizona (Map). No Scale Given. Phoenix: Arizona Highway Department. Phoenix inset. Retrieved August 24, 2018 – via AARoads.
  11. ^ Breyer, Joe. "Arizona DOT Right-of-Way Resolution 1962-151". Arizona Highway Data. Works Consulting, LLC. Retrieved March 6, 2016.
  12. ^ a b Arizona Department of Transportation, Multimodal Planning Division (2015). "State Highway System (ArcGIS)". Arizona Department of Transportation. Retrieved August 1, 2018.
  13. ^ "ATIS Nomenclature" (PDF). GPS Tools for Arc View. Arizona Department of Transportation. August 2, 2000. pp. 57 to 64.
  14. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1966-P-075". Arizona Department of Transportation. Retrieved October 18, 2018.
  15. ^ a b c d e f g h i j k l m n o p q r s t u Arizona Highway Department; Rand McNally Company (1963). State Highway Department Road Map of Arizona (Map). 1:1,520,640. Phoenix: Arizona Highway Department. Retrieved August 24, 2018 – via AARoads.
  16. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1973-P-074". Arizona Department of Transportation. Retrieved October 18, 2018.
  17. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1974-P-056". Arizona Department of Transportation. Retrieved October 18, 2018.
  18. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1972-P-082". Arizona Department of Transportation. Retrieved October 18, 2018.
  19. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 2001-8-A-060". Arizona Department of Transportation. Retrieved October 18, 2018.
  20. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1974-P-060". Arizona Department of Transportation. Retrieved October 18, 2018.
  21. ^ Staff. "ADOT Right-of-Way Resolution 1969-P-063". Arizona Department of Transportation. Retrieved June 19, 2019.
  22. ^ Staff. "ADOT Right-of-Way Resolution 1999-11-A-053". Arizona Department of Transportation. Retrieved June 19, 2019.
  23. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1974-P-059". Arizona Department of Transportation. Retrieved October 18, 2018.
  24. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1974-P-057". Arizona Department of Transportation. Retrieved October 18, 2018.
  25. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1974-P-058". Arizona Department of Transportation. Retrieved October 18, 2018.
  26. ^ Arizona Department of Transportationg. "ADOT Right-of-Way Resolution 1992-08-A-056". Arizona Department of Transportation. Retrieved October 18, 2018.
  27. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1992-08-A-056". Arizona Department of Transportation. Retrieved October 18, 2018. RENUMBER U.S. 89 FROM JCT WITH I-19 NEAR GREEN VALLEY TO I-10 IN TUCSON
  28. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 2004-03-A-009". Arizona Department of Transportation. Retrieved October 18, 2018. Abandon B-19 (old 89) from Duval Mine Road going north to Los Reales Road; Portion goes to Pima County, portion goes to the Town of Sahuarita; PR: 9-9-27, p. 26; + various; and 92-08-A-56.
  29. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1984-10-A-063". Arizona Department of Transportation. Retrieved June 5, 2019.
  30. ^ Multimodal Planning Division, Roadway Inventory Staff (December 31, 2009). "2009 State Highway System Log" (PDF). Arizona Department of Transportation. Retrieved June 5, 2019.
  31. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1984-10-A-064". Arizona Department of Transportation. Retrieved June 5, 2019.
  32. ^ a b c Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1984-10-A-064". Arizona Department of Transportation. Retrieved June 5, 2019.
  33. ^ a b Arizona Department of Transportation (December 31, 2007). "2007 State Highway System Log" (PDF). Arizona Department of Transportation. Retrieved June 5, 2019.
  34. ^ Arizona Department of Transportation (December 31, 2005). "2005 State Highway System Log" (PDF). Arizona Department of Transportation. Retrieved June 5, 2019.
  35. ^ Multimodal Planning Division, Data Bureau Staff (December 31, 2008). "2008 State Highway System Log" (PDF). Arizona Department of Transportation. Retrieved June 5, 2019.
  36. ^ Transportation Planning Division, Data Bureau Staff (December 31, 2006). "2006 State Highway System Log" (PDF). Arizona Department of Transportation. Retrieved June 5, 2019.
  37. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1980-10-A-040". Arizona Department of Transportation. Retrieved June 5, 2019.
  38. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1974-03-A-001". Arizona Department of Transportation. Retrieved June 5, 2019.
  39. ^ a b Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1984-10-A-066". Arizona Department of Transportation. Retrieved June 5, 2019.
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