I'is important to know position of the roads in a construction site.
Especially in an excavation quarry.
Especially if the change quickly.
Especially if it is a quite "vertical"site.
In the Apuanian Alps, North …
You can use a Total Station placing it on a point measured with GNSS receiver, in nRTK mode.
In this case you have a 2D precision of around 2/3 cm.
Or, better …