Route nationale 1b (Madagascar)

Route nationale 1b (RN 1bis) is a secondary highway in Madagascar of 94 km, running from Analavory to Tsiroanomandidy. It crosses the region of Bongolava and Itasy.

Selected locations on route
(east to west)
 * Analavory - (intersection with RN 1 from Antananarivo)
 * Ankadinondry Sakay (Babetville)
 * Tsinjoarivo
 * Tsiroanomandidy - (intersection with RN 1)