The Arizona Revised Statutes Annotated is the official statutory code for the State of Arizona. Traffic and DUI laws are in Title 28 - Transportation.
Ross-Blakley Law Library: The statutes are available in print in the law library in the Arizona Reference Collection (3rd floor).
Arizona State Legislature: Contains full-text session laws from the 43rd Legislature (1997) to the present
Nexis Uni: Remote access is available for law faculty and students.
Lexis (Lexis password required)
Westlaw (Westlawpassword required)
Arizona Statutes and Court Rules: current version of the Arizona statutes, constitution, and court rules
Arizona Statutes Annotated Historical: 1988–last year
Arizona Statutes Index