Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4723450.
This is a remix of the base tile from alex80it, who has some really excellent Gravitrax designs. I split his model in Shapr3D to make it print in 2 pieces so it could be printed without supports and without needing any glue. I didn't even think to check to see if there are other remixes (there are!), but I see those take a different approach than mine. The biggest difference is I did not change ANY dimensions or otherwise modify the original model, so once put together this should be very close to dimensionally identical to alex80it's model, so if you've already printed a bunch of his models (such as the excellent elevation system), this model is completely compatible.
This needs to be printed at 0.2 mm resolution. Make sure to print the "bottom" upside down. Then simply carefully snap them together. While it's possible to use these without glue, I would recommend a tiny bit of CA before snapping the pieces together.