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 the terrain, the underground railway station is at the top of the escalator while the overground station is at the bottom. The escalator replaced an earlier funicular railway. The material used for building the escalator was imported, and the design and construction were directed by a local engineer, who also directed the construction of Chongqing Amusement Park. There is a small charge for using the escalator, and it is monitored by a supervisor at each end. It takes 2.5 minutes for a passenger to finish a one-way trip on the escalator. The escalator plays a key role in the civil