Half-rib type section with PP DN 400 mm exhaust manifold in the presence of a retaining wall
In the event that the roadway has a transversal slope directed towards the valley, a triangular ditch will be made again in the upstream section, which however in this case will convey the water from the upstream basin to the relative well, while the precipitation that affects the roadway is discharged by making roof tiles near the curb breaks where road barriers are fixed. At the foot of the embryo, the laying of a Reno mattress is again envisaged in order to limit the erosive action on the ground.
