Consult a local traffic ticket attorney - worth the price in the long run. Also if in AZ they allow traffic school it will probably avoid points on your DMV recrod - maybe avoid possible insurance rate increase, depending on your prior record. I am not familiar with AZ law - I am a California attorney.
This is not intended to be legal advise or as legal representation. I am a California personal injury attorney . Be aware that every state has its own statute of limitations; and statutes & case laws that govern the handling of these matters.