Excessive speed is a leading cause of snowmobile crashes. While a burst of speed on a snowmobile can be exhilarating, make good choices to ensure you're in an appropriate location and in full control of your snowmobile at all times. Avoid putting yourself in danger by keeping your speed reasonable at all times for the conditions and locations you're riding in. Your speed should be slow enough to be able to safely respond to changing trail or terrain conditions, and should be reduced when visibility is poor or you are unfamiliar with the area. Never exceed posted speed limits on trails or roads, including those posted for roadways when you're operating in a road ditch.