http://www.forbes.com/logistics/2006/12/09/transportation-highways-speeding-biz-logistics_cx_tvr_1211speeding.html
It's always going to be freaking ridiculous, and nowhere near resonable, if it were up to me: 1st time you are pulled over, warning and you get entered into a database.
2nd offense, 100 dollar fine
3rd offense, 200 dollar fine
4th offense, 400 dollar fine... yup it just went exponential. .. and finally caught up to real fine for first time offenses in the US today. I gave you 3 chances to knock it off, and figure out how to not get caught... real cops don't. Elect me president, all federally subsidised roads get switched to my system.