You can add Montana to that list. If you are doing less than 10 over (more or less depending on cop) they will give you a ticket you can pay on the spot. The last few times I paid it was 20 bucks. It was also considered a waste of natural resources rather than a speeding ticket. I am sure times have changed there and it is more now. Back in the day it was a 5 dollar fine.
Cant imagine what all that woulda cost me these days!