by the Sabis mansio and the current Cervia saltworks. North of Ravenna it continued towards the lagoon of Comacchio flanking the Augusta canal commissioned by the emperor Augustus to connect Ravenna with the southern branch of the River Po, passing by the mansiones of Butrium and Augusta. The next mansio was Sacis ad Padum, near Spina, which was named after the Sagis branch of the Po. The road then crossed the Neronia canal and the Flavia canal and had the Neronia and Corniculani mansiones. It then reached the Hadriani mansio. Here the route split into two. The older one went to Atria. The other one went through the lagoon belt of the southern Veneto and reached Altinum. The Ariminum to Ravenna tract seemed to use the coastal cliff and sandy strip. However, it seems to have later run into problems and for a stretch a more inland route, which in part followed the current via del Confine, was preferred, even though the coastal route continued to be used. The road must then have gone along a coastal path again and must have reached Cervia, on the coast, where archaeological ruins have been found. The Sabis mansio on the River Savio seems to have served both routes. The road then reached Ravenna. From there it followed the Augusta canal until Butrium (in today's Sant’Alberto, on the southern shore of the lagoon of Comacchio) which was on the now extinct Po di Primaro branch of the River Po and skirted the mentioned lagoon. Perhaps there was a port there. It then followed the Augusta embankment where there was the Augusta mansio of the Tabula Peutingeriana. It then crossed Valtrenus. It was thus described by Pliny the Elder, "By the Augustan canal the Padus [Po] is carried to Ravenna, at which place it is called the Padusa … The nearest mouth to this spot forms the extensive port known as that of Vatrenus …” Slightly further north the road reached the now extinct Po Spinetico branch of the River Po, just before ancient Spina, just to the north of Comacchio. It then followed another extinct branch of the river, the Sagis, and reached the Sacis Ad Padum mansio, where a canal which was probably commissioned by the emperor Nero started. The road went through the Corniculani and Hadriani mansiones (perhaps in Codigoro and San Basiglio in the municipality of Ariano nel Polesine respectively).