List of state routes in Arizona

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Template:Short description Template:Use mdy dates <templatestyles src="Infobox road/styles.css" />Script error: No such module "Infobox".Template:Template other The U.S. state of Arizona's State Routes are usually abbreviated as SR.

History

The Arizona State Highway system was introduced on September 9, 1927, by the State Highway Commission (formed on August 11 of the same year). It incorporated the new federal aid system and also the U.S. Highway system. The 1927 plan included 27 state routes, most of which were simply dirt roads. Until 1942, the state route marker signs contained a Native American swastika that were used by Navajos, but were removed after the U.S.'s entry into World War II against Nazi Germany which had a reversed swastika as its emblem and became strongly negatively associated with the Nazis.

The modern system was introduced and adopted in the 1950s.

Designations and nomenclatures

The Arizona Department of Transportation (ADOT) internally recognizes Interstate Highways, U.S. Highways and Arizona Highways as all being separate types of highway designations. State highways within Arizona are referred to as Arizona State Routes or State Routes, with the prefix "SR" being used for abbreviations.[1][2] ADOT also recognizes seven different types of suffixed routes for the U.S. Highways and State Routes.[3] The recognized suffixes consist of the following with "(Number)" filling in for a numeric designation:

  • Alternate (A) – Referred to as "State Route (Number)A" and abbreviated as "SR (Number)A".
  • Business Route (B) – Referred to as "State Business Route (Number)" and abbreviated as "SR (Number)B" or "SR (Number) Bus.".
  • Loop Route (L) – Referred to as "State Loop Route (Number)" and abbreviated as "SR (Number)L". Despite often having "Loop" within their titles, SR 101, SR 202 and SR 303 are not considered "Loop Routes" by ADOT, nor are Interstate Business Loops.[3] To date, SR 89L has been the only Loop Route recognized by ADOT.[4]
  • Spur (S) – Referred to as "State Route (Number) Spur" and abbreviated as "SR (Number)S" or "SR (Number) Spur".
  • Truck (T) – Referred to as "State Route (Number) Truck" and abbreviated as "SR (Number) Truck".
  • Temporary (X) – Publicly referred to as "State Route (Number) Temporary" or "State Route (Number)T" and abbreviated "SR (Number)T".[5] Internally referred to as "State Route (Number)X" and abbreviated "SR (Number)X".[1]
  • Wye Leg (Y) – Referred to as "State Route (Number)Y" and abbreviated "SR (Number)Y".

U.S. Highways can also use the same suffixes listed above. Usually the suffixed routes are recognized by ADOT as U.S. Highways. For example, the Alternate route of U.S. Route 89 (US 89) is referred to as U.S. Route 89A (US 89A) instead of State Route 89A (SR 89A). The only exception to this rule is SR 93X, which is a suffixed route of US 93.[6] Suffixed routes for Interstates are a different story. Although the suffixed routes are signed with Interstate green Business shields, they are recognized by ADOT as suffixed State Routes. In the field, Interstate 10 business routes are signed as Interstate 10 Business Loop or Interstate 10 Business Spur, while they are referred to by ADOT as "State Business Route 10" (SR 10B) and "State Route 10 Spur" (SR 10 Spur). The same principle applies with business routes for all other Interstates in Arizona.[2]

Designations listed under Highway Logs and GIS data however, use the Arizona Transportation Information System (ATIS) nomenclature. The ATIS designation for a non-suffixed state route is "S (Number)". The number at the end is always three digits long. As such, all two digit routes are referred to under the ATIS terminology as "S 0(Number)".[2] SR 260 and SR 79 are known under ATIS nomenclature as "S 260" and "S 079" respectively. U.S. Highways replace the prefix "S" used by State Routes under the ATIS nomenclature with "U" while Interstate Highways use the prefix "I".[6] Suffixed routes under ATIS always have the internally applied suffix between the prefix.[2] State Business Route 79 under ATIS nomenclature is referred to as "SB079" and SR 93X is "SX093".[6]

Numbering System

The System

The numbering system for the state routes, with exceptions, prefers using numbers 60-99 for the routes, except when taken by an applicable US Route. Freeway state route numbers are hand-picked numbers below 60, with 24, 30, 50, and 51, being the chosen numbers. Loop freeways (Loop 101, Loop 202, Loop 303) follow a predictable (X0X) pattern, increasing both in the order of when they were constructed and distance from the city's center. Freeways near Phoenix Sky Harbor Airport were given the numbers of 143 and 153.

History and Exceptions

In 1927, when the system was created, the first ten state routes were added, in conjunction with the already existing US Routes. Six of these routes (73, 82, 83, 84, 87 and 88) still exist today.[7] As the system grew and expanded throughout the decades, more and more routes were added. A notable development came in 1932, when the first 3 digit spur route was added, State Route 287, a spur of Route 87. As the system continued to grow and evolve, some routes were decommissioned, and their numbers were re-used for future highways, as due to the limitations, limited numbers were available. As US routes began being decommissioned due to the rise of the Interstate Highway System, old alignments were often added to the state route system, keeping the number of the old US Highway, as a state route, all falling in the 60-99 range. As the system started to run out of numbers, more and more spur routes began being added to the system, which sometimes did not connect to their true parent, but rather, "in the vicinity" of the route. In 1974, the last 60-99 number was added to the system, State Route 98. The passage of Proposition 300 brought proper freeways to the valley, spelling the end of the state route system, since as mentioned above, state route freeways follow their own numbering rules, and State Route 143 in 1985 marked the first non-spur route to fall outside of the 60-99 system. The true end of the system occurred one year later, when State Route 238 (a non-freeway) was added, given the number seemingly at random, rather than "94" as proposed. Since 98 was added in 1974, all routes added to the system have either been freeways, spurs, small three-digit stubs, or de-commissioned US routes. Since the program's inception in 1927, all numbers between 60 and 99 were used by at least one State or US Route, aside from 94.

State Routes

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Unbuilt routes

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Arizona Parkways, Historic and Scenic Roads

File:Arizona Scenic Road Marker.svg
Official marker for roads under the Arizona Parkways, Historic and Scenic Roads program.

Currently, the Arizona Department of Transportation recognizes 26 state designated routes under the Parkways, Historic and Scenic Roads Program. Four are Historic Roads, 17 are Scenic Roads and five are Parkways.[8][9][10]

Parkways

Historic Roads

Scenic Roads

See also

References

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External links

Template:US state highways Template:Scenic Byways

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