Ariz. Rev. Stat. » Title 28
Arizona Revised Statutes

Ariz. Rev. Stat. § 28-643 (2026)

Local traffic control devices

✓ current as of May 2026
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Local authorities in their respective jurisdictions shall place and maintain the traffic control devices on highways under their jurisdiction as they deem necessary to indicate and to carry out this chapter or local traffic ordinances or to regulate, warn or guide traffic. All traffic control devices erected shall conform to the manual and specifications prescribed in section 28-641.  The manual shall include the specification that the yellow light duration must be at least three seconds.

 

Notes of Decisions
Cited in 4 cases, 1969–2019 · leading case: Kohl v. City of Phoenix, 160 P.3d 170 (Ariz. 2007).
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Kohl v. City of Phoenix, 160 P.3d 170 (Ariz. 2007). · cites it 4× “Indeed, A.R.S. § 28-643 (1998) expressly grants local authorities discretion to "place and maintain the traffic control devices on highways under their jurisdiction as they deem necessary.”
Rodgers v. Ray, 457 P.2d 281 (Ariz. Ct. App. 1969). · cites it 2× “” A.R.S. § 28-643. The placing of a traffic-control device in accordance with this power has the effect of determining the legality of the manner in which motor vehicles are operated in the area of such regulation: “The driver of any vehicle shall obey the instructions of any…”
Chavez v. Pima Cnty., 477 P.2d 763 (Ariz. Ct. App. 1970). · cites it 4× “Plaintiff sets out A.R.S. § 28-643 which states: “Local authorities in their respective jurisdictions shall place and maintain such traffic-control devices upon highways under their jurisdiction as they deem necessary to indicate and to carry out the provisions of this chapter…”
Tourtillot v. Yuma Cnty. (Ariz. Ct. App. 2019). · cites it 2× “” Handbook at 113; see also A.R.S. § 28-643 (granting local authorities discretion to “place and maintain the traffic control devices on highways under their jurisdiction as they deem necessary”).”
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