I have been having trouble with making a bridge that can be lowered or moved across a gap, when a lever is pulled. Some help would be appreciated.
Have you tried using the bridge in the sewers?
What's exactly the problem? It crashes, it doesn't work?
Anyways:
Right now I don't have time, but in the cistern level you can see how FG made it.
All you need is a lever function, an then use the line: SetMoveObjectState.
You can find what needs to be inside it on the wiki