(03 Aug 2014, 9:18 pm)Tom wrote Whats the point?
The escalators currently found at Metro stations are more than 30 years old. Nexus are replacing them with escalators that are much smoother and have more efficient technology (i.e. they slow down when nobody is using them to save energy).
I've watched that video before (and found it quite interesting) so I'm not going to watch it again, but I'm sure it mentioned in there (and if not, Nexus mentioned it elsewhere) that a lot of work is done overnight to reduce the time it takes to replace these escalators.