That explains why I once buried a speedometer, got pulled over and was surprised to learn I was doing considerably less than my adrenaline and the speedo said (140 mph).Very true, the speedometers are not only factory set to show a higher speed than actual, but in addition, at that speed level the “normal” speedometer error can be 10-15% above . So unless the speed is GPS measured, relying on the speedometer reading gives one a bit of a false sense of how fast you’re going ..
Utah cop was nice enough. He did a slow walk around my car, which made me nervous as hell, said "nice car" and then let me go with a warning. I sat there for another 10 minutes just shaking 😂. That was a long time ago...I was doing a cross country trip and no one was on the road at that time of Sunday morning.