What were the variables?

Was he passing you in opposite direction?
Other cars around you?
Were those cars going faster/slower?
Are you sure your speedo said 50?

Dude, I've gotten blasted with so many tickets. My speedometer gear was fucked in my transmission had teeth missing so it'd intermittently give false readings.

You want to try and get that reduced. Not sure what the speed limit on Jefferson is, but if you just got a Reckless, they stay on your record for 11 years. So you want it atleast a 19 over. Keep in mind, even if in opposing directions, he can have an accurate reading, so there is no arguement there.

Don't just pay the ticket, try and get it dropped. Your best bet is to bite the bullet and get a lawyer, it'll be less for you in the long run esp owning an S2000. Insurance is rape. If you haven't taken a driving class in 2 years VOLUNTARILY, go take one, get the extra 5 points cause youll need it when they deduct the 6 for a Reckless if you haven't gotten it dropped when you go to court.