Reply to Dessie Doolan in comments of Jeff Roberts flyover Day 551, this date.
At 3:57 the two groups of conduits are covered with concrete, one looks narrower than the other. I think this narrower one is for datacomm and telecom. If so, I don’t think they would need to run that much datacom to the switchyard/substation. The number of datacomm and telecom conduits would be more appropriate if it was going to a new building or complex.
However, if you look at the flyovers of Fremont campus, they have modulars or trailers that are semipermanent. Now that the GF Texas trailers have been moved to their present locations, they may be planning on making them semipermanent and connecting them up to the main building. There is a huge amount of land that has to be dealt with, so it may be years while Tesla deals with contractors to build future buildings on this campus. We already know that there will be a cathode plant building built so that’s another year of contractors working on site.