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It is either the classic problem of floating point precision or just data a data collection error. See my other answer.

I'm pretty sure some (if not most) of these problems are just polygonization issues i.e. when converting the image based approximation point cloud to polygons at a low level of detail. Those weird zigzag lines are clearly sign of incorrect topology / low polygon density; polygon edges should follow the curvature of the road, not go against it.

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