http://www.uscis.gov/files/form/N-400ins.pdfYou can compare Question 15-17
http://www.uscis.gov/files/form/N-400.pdfwith Part 3 -question 1(b) which says "excluding traffic
violation". on
http://www.uscis.gov/files/form/i-485.pdf If you have a copy of old N-400, the question on old N-400 was just like that of I-485. But new N-400 removed
"excluding traffic violation"