I am curious: did the officer at your oath ceremony specifically used the word "minor"? It would be interesting to understand USCIS's perspective as to what they consider "minor"...
Actually, she didn't even say "minor". She stated something to the extent of "Pay attention: I DON'T WANT TO KNOW ABOUT TRAFFIC TICKETS. I'M ONLY CONCERNED WITH ARRESTS. DO NOT MENTION TRAFFIC TICKETS". Of course, there's always a person who doesn't listen to directions. An applicant wanted to disclose a traffic violation and attempted to present proof of payment to the IO. The IO stopped what she was doing and repeated that she doesn't want anyone to list traffic tickets.
My personal interpretation of what is considered a "minor" traffic violation is one that doesn't involve a DUI/DWI/reckless driving and where the fine amount is less than $500. This is based on what's noted in M-476 and what I was told by a USCIS CSR.