Build a Magnetic Lift-out Bridge
Model Railroader 1999-12 pg. 97 Scale: (none) Category: "Layout Construction"
Using magnets to hold a lift-out section in place and using it to conduct trackpower, so that when the magnets are disconnected, trackpower is removed.
Build a Scale Track
Model Railroader 2002-09 pg. 68 Scale: (none) Category: "Track"
Using two set of points to divert the track to a scale. Includes diagram, construction and prototype photos.
Building a River Crossing
Model Railroader 1996-09 pg. 72 Scale: HO Category: "Structures - Bridges"
The author uses foam board for his layout's construction, so this article describes how he fit a bridge into the scenery. The result is very convincing.