My two cents. Disclaimer: IANAL or Judge, nor have I gotten a lot of tickets. Also, much depends on the laws of your state and the common practices of your local courts and individual judges.
Your best chance to walk away scot free is for the cop not to show. If he/she is not there to present evidence against you, the state has no case. You best chance to arrange that (other than hoping, praying, or taking illegal actions that no one here would condone) is to wait until you are assigned a court date, then call the court and tell them you can’t make it that day because of work (or whatever), and ask to reschedule. If you want to push your luck, try this twice.
As you described the stop, it seems as though the cop had some other reason for stopping you (instead of all the other faster cars) and when that didn’t pay off, he slapped you with the speeding charge. If he didn’t use radar or laser and only paced you (or didn’t even do that, but just made up the charge), it seems to me that your heavy traffic defense might be pretty good. So ** Freiheit**'s idea about using discovery to get the cop’s notes is excellent. (I have no idea how you would go about doing that, but a real lawyer will be along here shortly to tell you.)
The point is that you need to create a reasonable doubt in the judge’s mind about the evidence against you. The cop’s notes will be essential for that. If he really did have radar or laser or VASCAR (an undetectable timing system), then you better hope he doesn’t show up. But if he paced you, question him in detail about how long he had you in view, how far he was from you, how many other cars were between you, if he lost sight of you at any time, etc.
However, this may not help much either. At another forum I frequent, a poster showed the court mathematically how a cop who had claimed he had paced the driver after the cop made a U-turn to get behind him, couldn’t possibly have travelled the distance in question in the time the cop had testified to. The judge agreed with the defendant’s logic and math, but ruled him guilty anyway! He was appealing this verdict, but you can see that much rests in the hands of the judge.
So HBby’s suggestion of observing the judge’s behavior and attitude is another useful technique. I’ve sat in a court in which the judge seemed willing to believe anything the cops said, and another in which the judge basically prompted defendants on how to undermine the cop’s testimony. Some judges really resent cops trumping up charges against civilians and won’t let them get away with it if they can help it. Pay attention to the judge’s attitude in the cases before you. Hell, if you can manage it, try to sit in on your judge’s court before your trial date.
However, I strongly recommend against pleading guilty under almost any circumstances. You are innocent until proven guilty. The burden of proof is on the state to prove your guilt, and they don’t seem to have a strong case here. If you plead guilty and the cop isn’t there, you’ve just screwed yourself for no reason. I saw this happen to an acquaintance of mine who happened to be in court the same day as me.
I had been considering pleading guilty, too, until then, because my cop was present. But I pled not guilty, and she got up and said, The state has no evidence, your honor. Case dismissed. It turned out that the radar officer who had been with her at the stop was out sick, and he was the one with the evidence. I asked her to give him my best wishes for a quick recovery.
A final tip: this site has a lot of information (and is happy to sell you more) about fighting traffic tickets, especially radar tickets.
Good luck, and let us know how it turns out.