You can check the status of your Arizona photo radar ticket here: http://apps.supremecourt.az.gov/publicaccess/

Although if your specific court isn't included then you'll have to go to the court's website.

If you ignore it long enough and no process server finds you then your ticket should eventually show up as being dismissed by the court. Btw, this is also a way to see if a dishonest process server claims to have served you.