A moving walkway is a fixed electric drive device with a circular (plate or belt) walkway used to transport passengers horizontally or at an inclination angle not greater than 12 °. Moving walks are suitable for places where people flow, such as stations, terminals, shopping malls, airports, exhibition halls, and stadiums. Appeared in the early 20th century. The structure is similar to the escalator, which is mainly composed of two parts: the movable road and the handrail. Generally, the moving road surface does not form a step shape even when it is inclined.