There are a set of channels cut into the road that you can't see in the photo. I'm not a civil engineer, but I can't imagine the impact of a bunch of cars driving over the work in progress will be particularly constructive.
You can sort of make out the holes and they look mostly on one side of the road. They could maybe open up a single lane, with temporary traffic lights, or put down some road plates. Which night be appropriate if it was a major route or something.
There are a set of channels cut into the road that you can't see in the photo. I'm not a civil engineer, but I can't imagine the impact of a bunch of cars driving over the work in progress will be particularly constructive.