The #33253 Stacking Track Supports and older style #33557 Bridge Supports are fun pieces because you can get multi-layer track configurations, assuming you are using low-height engines and rolling stock, of course. An easy configuration for getting track layered on top of one another is shown below.
The top configuration is for Stacking Track Supports, and the lower is for Bridge Supports. Here’s the former in 3-D to help visualize it.
The idea is, you use a switch to branch off the main line, place an ascending track on the main, and then curve the branch back underneath it. This keeps the two branches almost exactly even, enough that the vario system can fill the gaps. To merge the two lines back, you simply mirror the arrangement on the other end.
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