I just called the NCSC and asked if traffic violations should be listed in the "Have you ever been cited..." section of the N-400. The representative read the following information from his computer (I'm paraphrasing): "Everything WITH THE EXCEPTION OF MINOR TRAFFIC VIOLATIONS THAT DID NOT RESULT IN AN ARREST must be disclosed on the N-400. This includes misdemeanors, felonies, arrests (even if it didn't result in conviction), and crimes for which you were not arrested". I asked the CSR to clarify what constituted a minor traffic violation, and he replied that his system doesn't have a definition of what exactly a minor traffic violation is. I then quoted the section of the guide with the $500/DUI/DWI rule. The CSR stated that only traffic violations that fall into that category have to be disclosed.