Route national 57 (Madagascar)
The Route nationale 57 (RN 57) is an 11 km long national road on the island of Nosy Be belonging to the Diana region off the northwest coast of Madagascar. It begins in the island's capital Andoany (Hell-Ville) on the RN 30a in the south of the island and leads in a north-easterly direction to Fascene Airport in the east. The RN 57 bears the street name "Route de l'Est" (East Street).