Ariz. Admin. Code § 18-2-1434
Notwithstanding the other requirements of this subpart, highway and transit projects of the types listed in Table 2 are exempt from the requirement that a conformity determination be made. Such projects may proceed toward implementation even in the absence of a conforming transportation plan and TIP. A particular action of the type listed in Table 2 is not exempt if ADOT or the MPO where one exists in consultation with other agencies pursuant to R18-2-1405, the EPA, and the FHWA (in the case of a highway project) or the FTA (in the case of a transit project) concur that it has potentially adverse emissions impacts for any reason. States and MPOs shall ensure that exempt projects do not interfere with TCM implementation.
Ariz. Admin. Code § R18-2-1434