@stux on rural highways here, they use a "train" where they grind, recycle, and re-lay the asphalt in a continuous process. One full lane at a time. It does a few kms in a day. But even with moderate traffic, it's a challenge not having a lot of accidents and killing workers. They have to setup escorts to lead the traffic. So that's pretty awkward too. If this overpass moves along, it's a lot safer.
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