OK - once on the top (upper) level of the superliner cars moving about the train still has the
problem of moving between cars and the automatic doors. An 18 inch walker should just
fit the bill maybe with some mobility issues in the SSL ?
Now
You are boarded on the lower level and wish to go topside - - -
If that custom walker can collapse into a dual cane may work ascending/descending
those "square" tight semi-spiral staircase ?
One problem is the multiple short stair planks cut at a 45 degree angle making this rough.
And then the train movement tossing the balancing body around.
Wish I had pictures (looking for diagrams to post) to show this better.
It is not perfect but a mobility impaired person with resolve maybe able to muster this.
An assistant companion aide would be the insurance that this be done safely.
Thinking of that custom walker if it could be split into two canes maybe a solution for some.
When walking around on the same level - Always be looking for something rigid and
stable to grab onto rather than the walker.