03-27-2016, 07:35 AM
(03-27-2016, 02:23 AM)GtwoK Wrote: I think it's simply that with one elevator, there's one elevator to hide in. And with 2 elevators, there are 2 elevators to hide in.
That is exactly what I am thinking. Although I think the fact that both sides of the single elevator are accessible without any grade change is actually more important — if we can make one elevator safe, we can make two elevators safe. But the space between the elevators remains isolated.
I think a tunnel which is at grade at one end is much different from some situation where one has to go down to the tunnel, across, and up the other side. I suspect this is true both of perception and the reality of safety. Also I anticipate that the tunnel would have side passages leading to the accesses for the second platform, so it’s not just a single enclosed space.