Three ways under the ground: a box buried in an open trench, a bored tube, and an immersed tube. Cover is what a job measures.
Turn the form
A cut-and-cover tunnel is a box built in an open trench, then buried. The roof of the box is the street.
A cut-and-cover tunnel is a box built in an open trench, then buried. The roof of the box is the street.
A tunnel section. Toggle cut and cover, bored tube, and immersed tube. Do not state a cover depth.
Use this on its own, or on a real site
This copies the Tunnel teaching spec. Illustrative numbers stay illustrative. A standalone example has no site. Associating it with Orbit names the tiles and, when the point has an address, only that place's code card.
Standalone example. Scene: teaching-plan. No site tiles, and no local code.
