My mistake. Got my bridges mixed up. Too much sun today!Martin, if I'm not mistaken, that backstage bridge has always had high walls on it. Since you could see it from the river boats (and possibly *just* from Africa or the CMM bridge) they needed to be able to hide service trucks heading to Discovery Island, or perhaps ambulances heading to First Aid.
If they intend to bring that bridge on-stage, I'd think they'd remove the walls to give views from the bridge rather than leave them.
-Rob