Quote:
Originally Posted by JHikka
Yeah, I hear the words "giant escalator" and I immediately think of reliability issues.
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Me to. Not only that, but if it fails you are walking the entire 26m down or up. If they had divided it up into 2 (or more) stages, if one fails, the others will likely still be working, you only need to walk half (or less) of the distance.
As Manconi said "the main challenge is usually dealing with grit and salt getting into the stairs." For that reason, the down escalator will be at the highest risk as many will have just come from outside. Once again, having multiple stages would reduce the issues as most of the grit and salt would be in the top escilator, letting the bottom escalators, run more reliably.
Also, here is where having a third escalator helps as not only do you get have a second escalator running up in the AM peak and down in the PM peak, but it gives you redundancy should one of the escalators stop working.
Quote:
Originally Posted by JHikka
I think escalators in both Saint Petersburg and Moscow are 120m/130m long.
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They use a single escalator for the entire distance?