Here, we see a trolley for each of the tracks underneath one of the caissons. There is an extremely delicate plan in place for moving each one of the caissons into position to be rolled onto the Syncrolift. It involves sliding them forward and to the side from their construction places. When moving to the side, each trolley will lower its jack, rotate 90 degrees, and then raise its jack, one trolley at a time. This is expected to be a very slow, laborious process.