Ya, if you take it to court, and the cop doesn't show up (seems to be about 50/50) they drop the case. If you take it to court with a lawyer (usually about $25-50), they'll usually just throw out the case because the court would rather just drop it than pay to prosecute and take the time for it.

If you get a lawyer, though, make sure it's one that advertises for speeding tickets or at least traffic violations. Those are the cheap ones, and since they do the same shit all the time, they know what they're doing. There's a ton of them in Arlington.

What is it they say about silence being golden?