My worst speeding proportionally has been on the bicycle - 22 mph in a 5 mph zone (on an MUP, with nobody on it). The signs say that they use radar but I have never seen any evidence of it.

BTW I'd never do that speed if there were anybody walking on the MUP.

I've caught Harleys and cars on some technical descents too...might have been speeding a bit on those occasions as well.