Because "ban'ei" racing is about strength and not speed, the winning time of major races is often slower than lower-class races, where even a small overtime can have a horse disqualified. With suitable ground conditions, horses pulling lightly loaded sleds can clock speeds under 50 seconds. The condition of the track is described using measured-moisture percentage. The track is repaired manually during or between races. Watering is used to prevent excess dust from irritating horses and people. Heating systems allow racing during the winter months.