That picture of the road is remarkable. I can’t figure why or how the land managed to split literally and perfectly right down the centerline. That’s amazing.
They pave the road the same way we do, on half at a time. This allows traffic to proceed with minimum disruption. However it leaves a seam down the middle. The roadway acted as if it had a strip of adhesive tape on the surface. That allowed the land to shift underneath but it held together along the seam.
Over the years, in fault prone zones, escarpments are weathered, becoming natural paths. Many within inhabited areas may become natural boundaries in land ownership and natural unpaved roadways. As they are further improved, and land development spreads, the same routes remain in the same paths and later tend to get paved as major roadways.
I keep going back for another look at that....crazy...