Route national 58b (Madagascar)
The Route nationale 58b (RN 58b) is a 6.5 km long national road on the south-eastern edge of the capital Antananarivo in the Itasy region in the center of Madagascar. It leads from Ankadindratombo in a south-easterly direction to Ambohimanambola . It crosses the RN 60 about halfway and runs along the Ikopa River .