@MichMatters When we're talking caps, just realize that we're most likely talking a few blocks at the eastern end of downtown (Grand, Washington, Capitol); it'd definitely won't be a full tunnel, which requires a complicated ventilation, drainage, emergenecy...systems. There was a mock-up by Dymaxion somewhere on the forum here some years back showing a concept of this.
I'd definitely love to see something like this. But I also understand how expensive it'd be to engineer something beyond open space that tops a cap, so I'm definitely not expecting something like that. Same reason I'm not expecting much more than maybe half-block extensions on either side. Like I said, after that, what you're building is a tunnel, and those are expensive. What I'm sure is being conceived is something like what we already have over parts of I-696 in Metro Detroit:
And a big reminder that even in those cases they did spend a lot of money to correct for a freeway cutting through a central business district, rarely do you have actualy skyscrapers built on the footprint.
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This is the concept you might be remembering, halfway down under "Mid Town Concept"
https://www.lansingoz.com/theproject
I'd definitely love to see something like this. But I also understand how expensive it'd be to engineer something beyond open space that tops a cap, so I'm definitely not expecting something like that. Same reason I'm not expecting much more than maybe half-block extensions on either side. Like I said, after that, what you're building is a tunnel, and those are expensive. What I'm sure is being conceived is something like what we already have over parts of I-696 in Metro Detroit:
And a big reminder that even in those cases they did spend a lot of money to correct for a freeway cutting through a central business district, rarely do you have actualy skyscrapers built on the footprint.