They didn't plan on the ground force from the cars sucking up the water valve covers in the street of the race track which requires asphalt repairs so I don't think we can expect them to plan on delays for staffing either. I have to think they were already maxed here as it was.

I'm surprised to read they are running cars at 230 am to 4am. I understand the time constraints but that racket at the middle of the night. Good thing it's in Vegas I guess.

As for why they water pipes under roads a part of me doesn't get for disruptions to traffic. I would have thought these would be better run under sidewalks and the edges of roads but I'm a layman in these areas. I suspect there's good reasons for this?