After the tunnel the road is marked by many galleries and strong avalanche-control curves back down into the Misox, using two long bridges to allow wide turns in this steep valley.
Between Ascona and a roundabout south of Gaggiole in the Canton of Ticino, A13 is extended as the N13 highway; however, it is indicated by the crossed-out highway signs that Switzerland motorway sticker on this route is not necessary.