Is there a statute of limitations regarding traffic tickets in New Jersey if you got one 10 years ago and just got a court summons?

The statute of limitations determines the deadline to file the charges. If you already receive the ticket and/or signed a promit to appear, the charges are already "filed" and the statute of limitations doesn't matter. If you failed to appear, this summons might be a result of failing to appear in court or failing to pay the fine. It would probably be best for you to hire an attorney to look at this than trying to handle it yourself.