Never. Don't try to fight it. Pay it off within the required time frame or you will be paying with less-sweetened penalties.
Many undercover cop cars wait at airports to welcome people into their town with speeding tickets. Airports have tried to temper the state and the city cops by parking airport security marked cars next to unmarked cop cars to aid drivers of speeding rules. However, this does not always work, and many people get mad at the airport instead, blaming and finger pointing as usual.
Speeding tickets are a way to help pay for jobs. Why would the state cut one traveler loose when cops are issuing tickets to their own city people for doing +2/+3 mph over the limit?
You're pist, but so are government employees trying to keep their jobs. Someone's gotta pay for big decision makers' boats and houses. That money keeps the state running, which keeps the feds running, which keeps corrupt business ideologies running from business boys that want to gamble with the economy and its people.
Welcome to the game of life!