Honesty is always the best policy when dealing with USCIS. You should submit and explanation of the circumstances surrounding the ticket and any evidence you may have regarding your compliance. It is unlikely that your application would be denied based on a traffic violation so long as you disclose the information.
This will have no effect on your green card, so long as this is your only interaction with law enforcement and you have no other criminal convictions. A criminal conviction could lead to you being placed in removal proceedings and being deported. If you have to reapply then you will have to pay the fee again. Talk to an attorney in your area if you have any more questions.
Gabriela M. Lopez, Esq.
Naturalization application places your entire immigration history for review before the officers and should not be taken lightly. You consult a experienced lawyer if you want to know whether your application would be denied. Best Wishes!
Attorney: Immigration Law
13295 Illinois St., Ste. 128
Carmel, IN 46032
Ph: (317) 660-6174