You don't normally load specifically on the curve. People get off on one side, the cabins go around the corner, and people on on the other side. There is no reason people couldn't get in a handicap cabin if it wasn't loaded, but they would likely do that once it has rejoined and people would get on it just like any other cabin.
The way this is setup though, it does seem like you wouldn't be able to make round trips, they will probably force you to get off and get back in line if you wanted to go back the other way.
Last weekend I was down in London, so my DS and I went on the Emirates cable car, to see what it was like.
It was interesting to see the mechanism in action. It was so much easier to understand when you could see the cars coming in pretty fast, then switch onto the slow turning wheel and rejoin on the other side. The "take off" looked (and felt) fast and steep! Did I mention I have a fear of heights?
Boy am I glad the Disney ones aren't going high!
Anyway, back to point.... those stations
do load on the turn. The cars come onto the slow wheel, slow right down to less than walking pace, doors open, people unload, car continues round and people load. I think there were 5 or 6 cars in the load area at a time. And we were allowed to stay on for the return trip.
ECVs and wheelchairs are allowed, strollers aren't. And they do just stop the whole line if necessary. First time was coming into the other station, which was fine. The second time was when we were right at the top, in the middle over the Thames. (
Shudders at the thought)!
Now I had always thought the loading and unloading would be on the straight. So with this set up, I assume the ECVs etc would load "on" the second turning wheel? So could that be stopped without affecting the main turning wheel? I assume so, from what you're saying. But I'm interested why you think this set up means they won't let you stay on for a return trip?
ETA : sorry to bring up the "thing that must not be named", but that day just happened to be the first hot day of the year. T-shirt and shorts weather. Well the cabin was warm, but not unbearably so. And the ride is around 10-12 minutes one way, so we were in it for 20 to 25 minutes. Air conditioning wasn't working (the guy told us that before we got on), and it was bearable. So 5 minutes in Florida should be fine, even in the humid climes.