Francis Scott Key Bridge collapse in Baltimore...

Merl said
A report I heard a little while ago said the MayDay call was received about 4 minutes before it hit the bridge. For that to be relayed to someone on both ends of the bridge to shut down traffic was as quick as it could be and a great job by those in the port and officials on the bridge to get it shutdown.

There is a briefing any moment by the NTSB so we may hear more about this.
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I would be shocked if there was an actual relay from the ship to the local Coast Guard to the road repair team.

I think its much more likely there was no real warning on the bridge except for seeing the damn ship coming at them in the final minute. But we'll see.