The central mid levels escalator system in Hongkong is the outdoor escalator system is currently the longest in the world, it is connected to the central business district and the mid levels residential area. The total length of 800 meters, the vertical gap of meters, composed of twenty escalators and three automatic sidewalk. The system will walk in different directions in the morning and in the afternoon. It takes about twenty minutes to travel from one end to the other.
The world's second longest outdoor escalator system is located in Hong Kong Ocean Park.
Washington, DC, one of the underground railway station, the escalator is 70 meters long, is the longest single escalator in the western hemisphere. Prague Czech subway station in 1998 with a 100 meter long escalator.