London Underground and the mechanisms are regularly degreased to lower the potential for fires. The only wooden escalator not to be replaced was at Greenford station, which remained until October 2015 when TfL replaced it with the first incline lift on the UK transport network. There are 426 escalators on the London Underground system and the longest, at , is at Angel. The shortest, at Stratford, gives a vertical rise of . There are 184 lifts, and numbers have increased in recent years because of investment making tube stations accessible. Over 28 stations will have lifts installed over the next 10 years,
Huangguan Escalator Huangguan Escalator The Huangguan Escalator (, also known as the Lianglukou Escalator) is an escalator in Chongqing, China. Constructed in 1993 and completed in 1996, the Huangguan Escalator was the highest single-grading escalator in China and Asia when it was built. Currently, it is the third highest escalator in Asia, after the escalator in Rustaveli station in the Tbilisi Metro (60 meters high) and an escalator in Pyongyang, North Korea. It is long and wide, with a height of about , and connects the Chongqing Railway Station at Caiyuanba to Lianglukou Underground Railway station. Due to the hilly nature of