A small service pack set, providing the builder with another piece of railway. This is an interesting piece though because it is a criss cross.
Feel like I would be pretty worried that two trains would crash into each other. Also feel like the most basic design for train tracks is the oval or circle, but this allows the builder to create the figure-8, which is another popular track layout. However, the cross pieces generally don't make right angles, but rather are slightly askew, if that makes sense. It's an interesting choice, but I'm not sure if it's something that I would use in any of my layouts.