While the scale is not so impressive, the cost is.
The initial Boring Convention Center Loop cost $47 million for 1.7 miles of tunnels. It's hard to find prices for this next set of 68 miles of tunnels, but if it's on track with the earlier ones, it seems cost effective
Sure, it would be great if we lived in a world in which public transit agencies used Prufrock machines to dig cheaply and at scale, but we don't
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