Michigan Moped Training Practice Test

The main idea is giving yourself enough time to react and stop if the vehicle in front suddenly slows or stops. The best rule is to keep about three to four seconds of travel distance behind the vehicle ahead. You can judge this by choosing a fixed object on the road (a sign, a tree, a shadow) and counting seconds as the front vehicle passes it; when you reach that same object, you should have about three to four seconds of space between you and the other vehicle. This amount of distance translates to different actual lengths depending on speed, but the timing helps ensure you have a clear margin to brake or maneuver. In wet, icy, or low-visibility conditions you’d want more than four seconds because stopping distances increase. At higher speeds or with distractions or poor road conditions, increasing the following time keeps you safer. Shorter gaps—like one to two seconds or two to three seconds—do not leave enough margin for a safe stop in a hurry, while waiting five to six seconds is typically more than needed in normal traffic and can slow others unnecessarily.