Escalators, or moving staircases, are continuously circulating motorized stairways that move people between floors of a building. Often used in conjunction with elevators, or in situations where elevators would be impractical, escalators provide a convenient, efficient, and comfortable means of travel for people needing to ascend or descend through limited sets of building levels—with five or six floors being a functional limit.
Unlike elevators, escalators require no waiting time for use as they continue to move at a constant speed. If an escalator breaks down, loses power, or ceases to function, the escalator can still be used as a normal staircase in most scenarios. Escalators are often used in retail stores, shopping malls, airports, transit centers, convention centers, arenas and stadiums, hotels, public buildings, and can also be detailed with weatherproofing for outdoor use.