Why should traffic be temporarily opened before asphalt pavement construction to avoid water damage caused by weather and vehicles at the grass-roots level? Who can explain it in detail?

Why should traffic be temporarily opened before the construction of the filter road? Avoid Jean weather, the vehicle is running at the water level, and it will be displayed when running. What I said and what you said are superfluous. Those who don't need to temporarily open the traffic before the whole day's construction can go to the flood together, and it is also possible to release the traffic after the completion of the main road construction.