Very cool. Reminds me of this video I saw recently about the new subway being dug in Vancouver. There they build a temporary road surface above the underground

Very cool. Reminds me of this video I saw recently about the new subway being dug in Vancouver. There they build a temporary road surface above the underground work: https://www.youtube.com/watch?v=D4YFFtTEUQc&t=380s https://www.youtube.com/watch?v=D4YFFtTEUQc&t=380s (I linked to the most relevant part, but the coolest part of this video is probably the machine that bores and reinforces the tunnel in one pass.)