It's rare I get stupid on speeding. My normal driving speed if I'm not in a justifiable hurry is about 5 over the limit. Most Interstates are 70, so I set her on about 75 cruise and relax. Interstates in South Dakota are 80 limits, so I set it on 85. That seems a little stupid to me, but up there the interstates are about as straight as an arrow for miles and miles. In Mississippi, you're generally ok on about 75-79......if you go above 80, you start sticking out like a sore thumb to the MHP. Just keep it under 80 and you'll probably be fine. The MHP are looking for the big fish who drive 80-100.