In this subtitle the following words have the meanings indicated. “Off-road vehicle” means a motorized vehicle designed for or capable of cross-country travel on or immediately over land, water, snow, ice, marsh, swampland, or other natural terrain. “Off-road vehicle” includes: a four-wheel drive or low-pressure-tire vehicle; a motorcycle or a related two-wheel vehicle; an amphibious machine; a ground-effect vehicle; and an air-cushion vehicle. “Vehicle” has the meaning stated in § 11-176 of the Transportation Article. “Wanton” retains its judicially determined meaning.