If you got a ticket for speeding in Pennsylvania and live in Florida should you go back to contest it if you have not had any infractions for 19 years?
Only you can decide if it is important enough, worth enough or valid enough for you to contest the ticket. In todays world, it will most likely find it's way to your states' record if you do nothing though.
An alternative to going back there to contest it personally, is to hire a local attorney there. Traffic ticket defense is normally fairly inexpensive. They may well be able to beat the charge for any number of reasons, or make an arrangement with the court, (like doing an on line PC program from anywhere, which is available many places, or get it reduced to a non moving violation) that, especially with your good record, will essentially dismiss the case.