Guests ascending to the 67th, 69th, and 70th level observation decks (dubbed "[[Top of the Rock]]") atop the [[GE Building]] at [[Rockefeller Center]] in [[New York City]] ride a high-speed glass-top elevator. When entering the cab, it appears to be any normal elevator ride. However, once the cab begins moving, the interior lights turn off and a special blue light above the cab turns on. This lights the entire shaft, so riders can see the moving cab through its glass ceiling as it rises and lowers through the shaft. Music plays and various animations are also displayed on the ceiling. The entire ride takes about 60 seconds.

हवाचलित किंवा निर्वात उद्वाहक
Hydraulic elevators
"Top of the Rock" elevators
आणीबाणी-उर्जा क्रियान्वयन Emergency power operation (EPR)