Ok, so basically anywhere inbetween the Sullivan/Ixonia exit and the Lake Mills exit there is almost always at least one Jefferson County sheriff on that stretch. I make the trip from Milwaukee to Madison about four times a week and they are always there. There is an exceptionally grumpy sheriff that is on a motorcycle in that area. He is often parked on the shoulder of the road and has almost gotten me twice (took the guy in front of me), and he successfully got me once. Anything less then ten over and you should be safe.