Since it happened BEFORE the interview, you already disclosed it and it is in the N-400 record of proceeding. Correct?
IF that is NOT the case then you would have lied to obtain a benefit under the Immigration and Nationality Act and would be barred from even re-applying for 5 more years from the date of the most recent lie (lie included lies of omission).
Got the ticket recently after the paperwork went in but just before the interview. I just read the N-400 instruction again and it states "Note that unless a traffic incident was alcohol or drug related, you do not need to submit documentations for traffic fines and incidents that did not involve an actual arrest if the only penalty was a fine of less than $500.00 or points on your drivers license". Looking at this, even if I had got the ticket before filing my naturalization papers, I would have not disclosed it. What do you think ?