I made significant progress on my staging yard and lift bridge this
week. I laid track in the staging yard and added a safety fence to
shield the trains against the long drop as well as stray elbows.

The staging yard can hold 4 full-length trains.
In
addition, I added the safety stop that cuts off power to the staging
yard, bridge, and both approach tracks when the bridge is up. After two
failed attempts using metal contacts (getting them to touch was a
hit-or-miss scenario) and momentary switches (reversed functions;
bridge is up train goes, bridge is down train stops!) I finally hit on
the solution using a default-off button. Now I have good contact, the
switch triggers easily, and the train stops when the bridge goes up!
Photo
lights are really useful when taking photos under the benchwork!
The tiny little pin is the button itself, with the wiring visible
below. It's actually a complete mess down there, with a lot of remnants
of old wiring from the two failed attempts before that. I ended up only
isolating the inside rail, since with no ground, trains won't move. So
I have a lot of redundant wires down there. The large dowels are my
method of keeping the bridge in alignment.
Now all that's left is to add track on the bridge... It will have to be glued with wood glue or plain white glue, since the hardwood is impossible to drive track nails into, screws don't go into it, and pre-drilling holes is out since I don't have a bit small enough.