Mark Brader:
... I used to work in a building with double-deck elevators. If
you worked on an even-numbered floor, to get there you boarded from the
ground floor. For odd-numbered floors you'd take the escalator to the
basement concourse to catch the elevator.

... Going back down, you'd just have to take whichever deck arrived,

Tom Anderson:
Wouldn't that always be the same for a given floor? Or did the lifts not
follow the synchronisation pattern on the way down?

Correct, they didn't.

Both decks had buttons for all floors they could reach; they just didn't
all work when you were on the ground or basement. So trips between
floors above ground were generally like using a normal elevator.)

Even going up?

Yes.
--
Mark Brader, Toronto | "Men! Give them enough rope and they'll dig
| their own grave." -- EARTH GIRLS ARE EASY

My text in this article is in the public domain.