In a normal world, infrastructure damage with an impact as large as this would be fixed in a week or two. For anyone not familiar with the east coast of the US, this is the north-south corridor which runs from Miami, Florida to the Canadian border in Maine. There are alternative routes for through traffic (namely the NJ Turnpike) but diverted traffic is going to be a nightmare while we wait for this to be repaired.
Why would this take a week anywhere? Building an overpass is hard.
working triple shifts to get it done vs. the graft-ridden american process where both the contractors and unions are mafia outfits
"Let's make the people building critical infrastructure exhaust themselves working triple shifts" doesn't sound like the best idea
almost like you can hire 3 shifts of people to work
that isn't what triple shifts means. 8 hours x 3 shifts = 24. it means you have 3 people working three shifts instead of 1 person working 1 shift, so the site is constantly open with prep, material delivery/staging, demolition/clean up, inspections etc.
Concrete has very long cure time outdoors
https://hexbear.net/post/272284/comment/3525953
You essentially need a stockpile of pre-assembled replacement parts to do something like this, so it will never happen here with just-in-time manufacturing. On the same note, we are beyond megafucked if and when we get hit by "The Big One®" solar flare edition.