The number of construction vehicles doing something versus sitting around waiting for labor in that shot is impressive.
And the narrow access road is way too congested for all those to actually leave or arrive at that rate. Moments after the shot, the trucks will clearly all have to stop and wait.
This being said, there is power in that many machines in the same place at one time. They would cetainly be able to get work done quickly. Just not quite as quickly as it appears in that shot. Waiting is part of the process, you cant have a system where every component works at 100% capacity