United States Numbered Highways of the Arizona State Highway System
Example signage from Arizona's U.S. Highways
U.S. Highways highlighted in red Special routes highlighted in blue
System information
Maintained byADOT and local jurisdictions
Length	2,060.22 mi[1] (3,315.60 km) Includes overlaps with Interstates and State Routes
Formed	November 11, 1926 (byAASHO) September 9, 1927 (by Arizona)
Highway names
Interstates	Interstate X (I-X)
US Highways	U.S. Route X (US X)
State	State Route X (SR X)
System links
Arizona State Highway System Interstate US State Scenic Proposed Former

TheU.S Highways in Arizona are the segments of theUnited States Numbered Highways that run within the U.S. state ofArizona.

TheUnited States Numbered Highway System (U.S. Highway System) was originally approved by theUnited States Department of Agriculture Joint Board on Interstate Highways on November 11, 1926, and was to be overseen and maintained by theAmerican Association of State Highway Officials (AASHO).^[2] TheArizona State Highway Department (ASHD) formally recognized the U.S. Highways on September 9, 1927, during the establishment of theArizona State Highway System.^[3] When the U.S. Highways within Arizona were first being planned, the proposed routes consisted ofU.S. Route 60 (US 60) fromTopock toLupton,US 70 fromHolbrook toNew Mexico,US 80 fromYuma to New Mexico,US 89 fromFlagstaff toUtah,US 91 fromNevada toUtah through theArizona Strip,US 180 fromFlorence Junction to New Mexico, US 280 fromAsh Fork toPhoenix and US 380 fromTucson toNogales.^[4] When the system was commissioned however, noticeable changes had been made. US 60 had been renumbered to US 66 and US 280 and US 380 became a southern extension of US 89. This also meant US 89 shared a long concurrency with US 80 between Phoenix and Tucson, as well as a wrong-way concurrency with US 66 between Flagstaff and Ash Fork.^[5]

In 1931, US 70 became the first U.S. Highway to be decommissioned in Arizona. It was replaced byUS 60 betweenSpringerville and New Mexico, and by a newly commissioned highway designatedUS 260 between Holbrook and Springerville. US 60 had also been established over other existing state highways fromEhrenberg to Springerville, creating a concurrency with US 80 and US 89 between Phoenix and Florence Junction.^[6] US 70 was given a new routing between Clovis andEl Paso, Texas viaAlamogordo, New Mexico.^[7] US 180 was re-designated as part of a new extension of US 70 through Arizona in 1935.^[8] US 70 also ran entirely concurrent with US 60 from Ehrenberg toGlobe.^[9]

1935 was also the yearUS 466 andUS 93 were extended southeast from Nevada toKingman, by way of the recently completedBoulder Dam (now Hoover Dam). Both US 93 and US 466 were entirely concurrent with each other in Arizona.^[10] By 1939,US 666 had been extended south into Arizona, at a terminus with US 80 inDouglas. US 666 was concurrent with US 66 between Lupton andSanders, US 260 fromSt. Johns toAlpine and US 70 betweenSan Jose andSafford. By this time, US 260 had also been extended southeast to New Mexico.^[11] In 1941, an alternate route of US 89 known asUS 89A had been established over former State Route 79 (SR 79) betweenPrescott and Flagstaff, viaJerome andSedona.^[12]

Following the end of theSecond World War, traffic had greatly increased on the U.S. Highway System throughout the country, resulting in an increase of traffic accidents and rough road conditions. These factors would contribute to theFederal Aid Highway Act of 1956, which established theInterstate and Defense Highway System (which are often referred to as "Interstates" for short) was established. This new network of nationwide freeways was slated to replace the heaviest traveled U.S. Highways and state highways in the country. Five Interstates were planned in Arizona to supplant or bypass existing U.S. Highways. US 60 between Ehrenberg and Phoenix was to be replaced by the western section of the newly plannedInterstate 10 (I-10),I-8 and the eastern section of I-10 were to bypass or replace the entirety of US 80,I-40 was to replace the entirety of US 66,I-17 andI-19 were to replace parts of US 89 andI-15 was to replace all of US 91. Construction of the Interstate Highway system was well underway by 1957.^[13]

Despite the introduction of the Interstates, attention was still paid to designating new U.S. Highways or altering the routes of existing examples. In 1959, US 89 between Utah andBitter Springs was moved onto a new route throughPage over theGlen Canyon Dam. The older route between Utah and Bitter Springs became a northern extension of US 89A.^[14] In 1960, the southern section ofSR 95 betweenQuartzsite andSan Luis was re-designated as an extension ofUS 95. The remainder of US 95 in Arizona was concurrent with US 60 (future I-10) between Ehrenberg and Quartzsite.^[15] In 1961, US 260 had been decommissioned and made into a western extension ofUS 180. US 180 was also extended over US 66 from Holbrook to Flagstaff and replaced SR 164 between Flagstaff andValle.^[16] In 1965, sections ofSR 64 andSR 364 between US 89 andFour Corners were designated as part of the newUS 164. US 164 was also concurrent with US 89 between former SR 64 and US 66 in Flagstaff.^[17] US 93 was also extended southeast from US 66 in Kingman to a junction with US 89 nearWickenburg, replacing part ofSR 93.^[18] In 1969, US 70 was truncated to Globe, no longer running concurrently with US 60 to California.^[19]

The year 1970 brought substantial changes to highways within the Four Corners region. The short existence of US 164 lasted only six years, when it was replaced by a re-routing ofUS 160. However, the concurrency between US 89 and US 164 was removed and not made part of US 160.^[20]US 163 was also established in theNavajo Nation, starting at US 160 nearKayenta and going throughMonument Valley into Utah.^[20] Before US 163 was established, the route was designated asSR 464^[21] In 1974, US 91 was entirely decommissioned south ofBrigham City, Utah.^[22] I-15 had completely taken its place.^[13] In 1977, US 80 was truncated from Yuma toBenson.^[23] Most of the route was replaced by I-8 and I-10.^[13] However, the section betweenGila Bend andBuckeye replaced by a northern extension ofSR 85.^[24] In 1979, theAmerican Association of State Highway and Transportation Officials (AASHTO) approved a request from California and Arizona to truncate US 66 from the California state line, east to I-40 and US 666 inSanders.^[25] However, Arizona continued to designate and sign US 66 between Sanders and I-40/US 93 in Kingman.^[26]

The 1980s and early 1990s would see the last large scale changes to U.S. Highways in Arizona. In 1981,SR 63 was decommissioned after it andBIA Route 12 became a southern extension ofUS 191 across the Utah state line into Arizona nearMexican Water, ending at US 66/I-40 inChambers.^[27] In 1982, US 60 was truncated between theColorado River in California to I-10 inBrenda.^[28] I-10 entirely replaced US 60 from Brenda west into California.^[29] Arizona unsigned and decommissioned all of US 66 internally in 1984, following the completion of I-40. The remaining sections became business loops of I-40 orSR 66.^[30] AASHTO recognized and approved the elimination of US 66 in 1985, with the entire route also being removed nationwide.^[31] In 1988, US 64 was extended from New Mexico into Arizona overSR 504 to US 160 inTeec Nos Pos.^[32] Coincidentally, the small section of US 64 in Arizona was once designated as a section of SR 64.^[33]

US 80 was eliminated from Arizona in 1989, after both Arizona and New Mexico had requested AASHTO to remove the designation from both states.^[34] What remained of Arizona's section was redesignated asSR 80.^[35] In 1992, when US 89 was truncated from Nogales to Flagstaff, and when US 666 was decommissioned, becoming an extension of US 191. The elimination of US 89 south of Flagstaff also allowed US 93 to be extended south to a new terminus with US 60 in Wickenburg.^[36][6] The remaining sections of US 89, not concurrent with US 60, I-19 or I-40 became part ofSR 77,SR 79 andSR 89.^[37] The truncation of US 89 was followed by the truncation of US 89A from Prescott to US 89 south of Page. Between Prescott and Flagstaff, former US 89A becameSR 89A.^[38]

Historical U.S. Highway Markers Used in Arizona

1926–1956

1956–1960(Northbound)

1956–1960(Eastbound)

1956–1960(Southbound)

1956–1960(Westbound)

1960–1963(Northbound)

1960–1963(Eastbound)

1960–1963(Southbound)

1960–1963(Westbound)

1963–1991

1991–Present

Number	Length (mi)[1][39][40]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
US 60	369.31	594.35	I-10 atBrenda	US 60 atNew Mexico state line	01932-01-011932	current	Formerly ran–California state line nearEhrenberg.
US 64	4.14	6.66	US 160	US 64 atNew Mexico state line	01989-01-011989	current
US 66	332	534	US 66 atTopock	US 66 nearLupton	01926-01-011926	01985-01-011985	Replaced byI-40 andSR 66; designated as a Historic Route and National Scenic Byway state-wide.[41]
US 70	107.5[42]	173.0	US 70 atNew Mexico state line	US 66 atHolbrook	01926-01-011926	01932-01-011932	Replaced by US 60 and US 260
US 70	122.08	196.47	US 60 inGlobe	US 70 atNew Mexico state line	01935-01-011935	current	Ran concurrently with US 60–California border nearEhrenberg until 1969.[43]
US 80	486	782	US 80 atYuma	US 80 atNew Mexico state line	01926-01-011926	01989-01-011989	Replaced byI-8 andI-10. Remaining route becameSR 80. Designated as a Historic Route state-wide.[44]
US 89	137.85	221.85	I-40 BL /US 180 atFlagstaff	US-89 atUtah state line	01926-01-011926	current	Historically ended inNogales
US 89A	86.90	139.85	US 89	US-89A atUtah state line	01960-01-011960	current	Old routing of US 89
US 89A	88	142	US 89 atPrescott	US 89/I-40 BL atFlagstaff	01941-01-011941	01993-01-011993	BecameSR 89A. Designated a Historic Route fromJerome toCottonwood.[41]
US 91	15	24	US-91 atUtah state line	US 91 atNevada state line	01926-01-011926	01974-01-011974	Replaced byI-15 and Mohave County Route 91.
US 93	199.38	320.87	US 60 atWickenburg	US 93 atNevada state line	01935-01-011935	current
US 95	123.36	198.53	Fed. 2 at theMexican Border atSan Luis, AZ	I-10 /US 95 atCalifornia state line	01960-01-011960	current	FormerlySR 95
US 160	159.35	256.45	US 89	US 160 atNew Mexico state line	01970-01-011970	current	FormerlySR 64 andSR 164
US 163	23.21	37.35	US 160	US-163 atUtah state line	01970-01-011970	current
US 164	217.40	349.87	US 66 /US 180 /US 89 inFlagstaff	US 164 atNew Mexico state line	01964-01-011964	01970-01-011970	Replaced byUS 160
US 180	170.8	274.9	US 60 /US 80 /US 89 inFlorence	US 180 nearFranklin	01926-01-011926	01935-01-011935	Replaced completely by US 70 on June 17, 1935.[8]
US 180	287.77	463.12	Grand Canyon National Park	US 180 atNew Mexico state line	01961-01-011961	current	ADOT signs west end atSR 64 inValle
US 191	516.50	831.23	SR 80 atDouglas	US-191 atUtah state line	01982-01-011982	current	FormerlySR 63 and US 666
US 260	283	455	Holbrook, AZ	Deming, NM	01931-01-011931	01962-01-011962	Now part of US 180
US 466	72.59	116.82	US 93 /US 466 atNevada state line	US 66 atKingman	01935-01-011935	01971-01-011971	Now US 93
US 666	373.37	600.88	I-40 /US 666 atNew Mexico state line	SR 80 atDouglas	01938-01-011938	01992-01-011992	Now US 191
Former

Number	Length (mi)[1]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
US 80 Bus.	—	—	US 80 inWinterhaven, CA	US 80 inYuma, AZ	01957-01-01c. 1957	01976-01-01c. 1976	Handed over to the city of Yuma.
US 80 Alt.	—	—	US 80 inPhoenix	US 80 inPhoenix	—	—	Handed over to the city of Phoenix. Exact dates of existence unknown.
US 80 Alt.	—	—	Washington Street inPhoenix	US 60/US 70/US 80/US 89 nearTempe	01930-01-011930	01961-01-011961	Handed over to the city of Phoenix. Was most likely never signed.
US 80 Truck	—	—	US 80 inTombstone	US 80 inTombstone	01955-01-01c. 1955	01964-01-01c. 1964	Replaced by US 80 (laterSR 80).
US 89T	43.58	70.14	US 89 atThe Gap	SR 98 inPage	02013-01-012013	02015-01-012015	Temporary route while US 89 was undergoing repairs. Replaced by Navajo Route 20.
US 93 Spur	0.29	0.47	I-40/US 93 inKingman	Historic Route 66 in Kingman	02009-01-012009	current	Signed as Historic US 66.
US 95 Truck	0.45	0.72	Fed. 2 at theMexican Border inSan Luis	US 95 in San Luis	01984-01-011984	02015-01-012015	Replaced by northbound US 95.
US 191 Bus.	1.15	1.85	Fed. 2 at theMexican Border inDouglas	SR 80 inDouglas	01991-01-011991	current	Former US 666 Bus.
US 666 Bus.	1.15	1.85	Fed. 2 at theMexican Border inDouglas	SR 80 inDouglas	01962-01-011962	01992-01-011992	Replaced by US 191 Bus.
US 191T	14.22	22.88	US 191 inClifton	US 666 north of theMorenci mine	01974-01-011974	current	Former US 666T
US 666T	14.22	22.88	US 666 inClifton	US 666 north of theMorenci mine	01974-01-011974	01992-01-011992	Replaced by US 191T
US 191Y	3.51	5.65	I-10 inClifton	US 191 inCochise County	01992-01-011992	current	Former US 666Y
US 666Y	3.51	5.65	I-10 inClifton	US 666 inCochise County	01958-01-011958	01992-01-011992	Replaced by US 191Y
Former

These are historic U.S. Highways recognized by the ADOT Parkways, Historic and Scenic Roads Program.^[41][45]

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
Historic US 66	204.14[46]	328.53	I-40 inTopock	I-40 inHolbrook	01987-01-011987	current	Sections of formerUS 66. Discontinuous sections connected by I-40.
Historic US 80	398.54[47]	641.39	I-8 Business (Historic US 80) at theCalifornia state line inYuma	NM 80 at theNew Mexico state line	02018-01-012018	current	Sections of formerUS 80. Discontinuous sections connected by I-8 and I-10.
Historic US 89A	9.99[48]	16.08	SR 89A inJerome	SR 89A andSR 260 inCottonwood	01992-01-011992	current	Sections of formerUS 89A.

These are U.S. Highways which were planned to run through Arizona, but were never designated or constructed.

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
US 87	—	—	ProposedUS 87 atNew Mexico state line	ProposedUS 87W/US 87E nearElfrida (First proposal) US 80 inDouglas (Second proposal)	—	—	Proposed twice in 1934 and 1943, but never commissioned
US 87E	—	—	ProposedUS 87/US 87W nearElfrida	US 80 inDouglas	—	—	Proposed, but never commissioned
US 87W	—	—	ProposedUS 87/US 87E nearElfrida	US 89 inNogales	—	—	Proposed, but never commissioned
US 193	—	—	US 93 inSacaton	US 93 inPicacho	—	—	Proposed, but never commissioned as a U.S. Highway.
US 789	—	—	Fed. 15 inNogales	US 66/US 666/ProposedUS 789 atNew Mexico state line	—	—	Proposed, but never commissioned as a U.S. Highway. Designation only existed asSR 789.
Former

• Arizona portal
• U.S. roads portal

• H., Alan."Arizona Roads - US Highways".

• U.S. Highways in Arizona
• Lists of roads in Arizona
• Lists of United States Numbered Highways

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