Personally (and this is a completely personal opinion, not a LEGAL one), I would only disclose tickets that were issued in the U.S. After all, we are applying to be AMERICAN citizens. If I was applying for citizenship in a country where the tickets in question were issued, and they had a provision to disclose traffic violations, then I'd disclose them.
Also, consider this for a moment. It's safe to say that many naturalization applicants received traffic tickets in their COBs prior to immigrating to the U.S. Does this also mean that an applicant who received and paid a ticket 20 years ago in his COB, came to the U.S. 15 years later (applied for naturalization 5 years after arriving in the U.S.) has to disclose a traffic ticket that he received ages before he/she even conceived the idea of immigrating to the U.S.?