2 words. Traffic lawyer.
If this is your first offense, they might reduce it down to failure to obey traffic control device or something like that. They just want your money, and aren't as concerned about putting points on your license. 20 over is quite a bit, at least here in NY. 10-15 over you could probably get away with talking to the DA yourself, but 20 warrants legal counsel, since its borderline reckless driving. If 20 over is counted as a reckless driving offense there, talk to a lawyer ASAP. I got a speeding ticket years ago in my Regal. Officer "said" I was doing 75 in a 55, but told me he would cite me as 72 so it didn't fall into reckless driving territory. I got a lawyer to reduce it to failure to obey a traffic control device.
2004 Buick LeSabre Custom FE5 GXP suspension conversion. 170Kmi
2001 Silverado 4WD 5.3L, 33" BFG ATs, Z71/Z82 pkg, 147kmi.