Here's excerpt from AILA's Liason Meeting in Texas in July 2013:
4. Some members have expressed concern about the practice of AO’s asking for dispositions for all traffic tickets in naturalization cases. Page 5 of the N-400 instructions clearly states: “Note that unless a traffic incident was alcohol or drug related, you do not need to submit documentation for traffic fines and incidents that did not involve an actual arrest if the only penalty was a fine of less than $500 or points on your driver's license.”
Can you please clarify whether the local office recognizes this distinction, or whether it is putting in place a new policy that is contrary to the N-400 instructions?
Houston follows all required policies, including Naturalization Quality Procedures (NQP), which relevantly states:
Officers are required to request certified court dispositions for the following:
All arrests/convictions for criminal acts committed during the statutory period;
Any arrest/convictions for any crimes where the applicant would still be on probation at the time of adjudication of the N-400 or may
have served 180 days incarceration during the statutory period.If there is a concern about what is requested, bring it up to a Supervisor before you leave the building.
So the USCIS' statement indicates that the AOs should not be asking for dispositions/receipts for traffic violations, as they only explicitly refer to arrests/convictions for crimes. Seems like even the agency itself doesn't have a standardized procedure in place, when it comes to traffic tickets.