The U.S. state of Arizona's State Routes are usually abbreviated as SR.
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, but were removed after the U.S.'s entry into World War II against Nazi Germany which had a reversed swastika as its emblem.
The modern system was introduced and adopted in the 1950s.
State Route 30 - Interstate 10 reliever connecting State Route 202 to State Route 303, with an extension to State Route 85.
State Route 50, proposed, never built
State Route 62
State Route 63
State Route 65
State Route 76
State Route 81
State Route 84A
State Route 89L
State Route 93
State Route 153
State Route 160
State Route 164
State Route 166
State Route 170
State Route 172
State Route 173
State Route 176
State Route 217
State Route 279
State Route 280
State Route 360
State Route 364
State Route 380
State Route 464
State Route 487
State Route 504
State Route 789
SR 95S (signed as SR 95 Truck)
SR 202S
SR 989
Below is a list of original state highways based on a 1927 map created by the Arizona Highway Department:
State Route 71 - From Clifton to US 180 near Safford
State Route 73 - From US 80 in Globe to McNary
State Route 74 - From the California–Arizona state line in Ehrenberg to US 89 in Wickenburg
State Route 79 - From US 89 in Prescott to US 66 in Flagstaff
State Route 81 - From US 180 in Safford to US 80 in Douglas
State Route 82 - From US 89 in Nogales to US 80 in Tombstone
State Route 83 - From US 80 in Vail to SR 82 in Santa Cruz County
State Route 84 - From US 80/US 89 in Tucson to SR 187 in Casa Grande
State Route 87 - From SR 84 in Picacho to US 80 in Mesa
State Route 187 - From SR 84 in Casa Grande to SR 87 in Pinal County
