Route nationale 1b (Madagascar)
| Route nationale 1 bis | |
|---|---|
| Route information | |
| Length | 94 km (58 mi) | 
| Major junctions | |
| From | Analavory | 
| To | Tsiroanomandidy | 
| Location | |
| Country | Madagascar | 
| Highway system | |
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)
 
