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On the slope of Mount San Martino towards Cantiano, in a craggy and landslide area, the remains of the Three Arches Bridge, with related upstream substructures and a stretch of paved road in the continuation of the road to the valley, are preserved.

The Archaeological Superintendence of Marche (P. Quiri), in accordance with the City of Cantiano, intervened to secure and "musealize" the bridge, preserved with original stonework at the bottom and with three arches, thanks to the subsequent restoration, to ensure continuous transit in this difficult and almost obligatory site.

Even the substructures upstream, reinforced by a massive buttress, are realized with a construction technique similar to the nearby bridge and the others along the way. These significant works appear to be part of a broader overall safety project of the consular road, probably due to an intervention of Augustus. An inscription attests building works carried out by Adriano to further ensure the viability of this inaccessible place, where there are also various sections of the containment walls upstream of the bridge, some semi-underground, in addition to a wall structure in the form of apse to stem the thrust of a landslide at the top of the hill.

Remains of the ancient roadway can still be seen in various places, with a preserved pavement, especially downstream, made up in local stone blocks laid tight to each other, to ensure the transit of the chariots on dual carriageway: it is a well-ordered roadbed, which sometimes presents the lateral curb consisting in stones arranged along the long side. This structure appears to be connected to the same restoration that led to the reconstruction of the three arches of the bridge.