At the risk of contradicting JoJo, I answered "yes" in the good moral character section regarding a reckless driving charge from Virginia in 2001 (doing 83 in a 65). Not alcohol or drug related, and only $100 fine, but it DID result in a misdemeanor on my record. Grumble grumble grumble.
After I did the fingerprinting, I received a form letter identifying "additional documents to bring to the interview" (there's no document number, so I can't provide it readily). Specifically, it asked for an original or certified copy of my birth certificate, copy of my driver's license, and an original or certified copy of the arrest record and court disposition for the driving offense. NOTE: the documents do not have to be submitted in advance of the interview.
Strictly speaking (according to "the guide") you don't have to provide documentation for driving offenses that are not alcohol or drug related and result in a fine less than $500. However, based on my experience, it seems that this might not be the case, although it could be the misdemeanor thing that triggered the response. I actually went to an online company (Intelius) and did a criminal background check on myself to see what showed up - for the $50 or so, it's well worth it, and you'll be prepared when it comes to the interview. If something shows up, then I would go ahead and get certified documents from the courthouse - it only takes a few days, and you've got yourself covered just in case.
Hope that helps. BTW: there was a statement on the follow-up letter that mentioned an Affidavit alternative for the birth certificate, so I'd probably take that along.
2008-06-23 : N-400 sent to TSC
2008-06-24 : N-400 received by TSC
2008-06-27 : Check cashed
2008-07-07 : NOA received ("notified within 450 days")
2008-06-24 : Priority Date
2008-07-11 : FP letter
2008-07-17 : FP Appointment
??? : Interview Letter
??? : Interview Date
??? : Oath