An all-terrain vehicle (ATV), also known as a quad, quad bike, three-wheeler, four-track, four-wheeler or quadricycle as defined by the American National Standards Institute (ANSI) is a vehicle that travels on low-pressure tires, with a seat that is straddled by the operator, along with handlebars for steering control. As the name implies, it is designed to handle a wider variety of terrain than most other vehicles.