An all-terrain vehicle (ATV) is a motorized off-highway vehicle designed to travel on four low-pressure or non-pneumatic tires, having a seat designed to be straddled by the operator and handlebars for steering control. ATVs are also known as quad bikes or quads if they have four wheels. They are subdivided into two types as designated by the manufacturer. Type I ATVs are intended by the manufacturer for use by a single operator and no passenger. Type II ATVs are intended by the manufacturer for use by an operator and a passenger, and are equipped with a designated seating position behind the operator. ATVs are used for a variety of purposes, including recreation, racing, and specialized work. They are also used in agriculture for their maneuverability and ability to bridge the advantages of trucks and tractors. ATVs come in different sizes, and the ATV industry recommends all riders operate an ATV intended for their age.