Segway is a two-wheeled personal vehicle that operates on a self-balancing mechanism invented by Dean Kamen. This vehicle is manufactured by Segway Inc. in New Hampshire, USA. The word "Segway" sounds similar to "segue" (an Italian word meaning "move gently").

A special feature of Segway is the self-balancing mechanism thanks to the computer system, the engine and the gyroscope located inside the car, it helps the car to have only one axle moving with two wheels but always in the state of weight. equal, the user only needs to lean forward or backward to steer the vehicle forward or backward. For right or left controls, Segway has a joystick called "Lean Steer" - wanting to control right or left just tilt the rudder in that direction. Segway PT's engine can reach speeds of 5.6 m / s (or 20 km / h). Because of its relatively high cost and is only suitable for flat locations, Segway PT is now primarily used in police departments, military bases, manufacturing facilities or industrial parks.