Arch / bridge / tunnel for Lego train

This is an arch to create bridge and / or tunnels for Lego train tracks. It's designed to support 2 train tracks at their connection point.

It measures 12 bricks high, which is enough for most trains, 16 bricks wide and 4 bricks long.

It has connectors to attach it to any other Lego piece.

I recommend printing it upside down with support just for the first layers.

Included the fusion file for remixes.