There are at least four means of moving an elevator:

Geared traction machines are driven by [[alternating current|AC]] or [[direct current|DC]] electric motors. Geared machines use [[worm gear]]s to control mechanical movement of elevator cars by "rolling" steel hoist ropes over a drive sheave which is attached to a [[gearbox]] driven by a high speed motor. These machines are generally the best option for basement or overhead traction use for speeds up to 500 ft/min (2.5 m/s).

गेटवे आर्च The Gateway Arch
"Top of the Rock" elevators
उद्वहन यंत्रप्रणालीचे प्रकार
वैद्यकिय आणीबाणी/'नीलसंकेत' सेवा Medical emergency/'Code Blue' service (EHS)