The Route nationale 30 is a highway in Picardy and Nord-Pas-de-Calais, northern France.
Before 1973, The RN 30 was connecting Rouen to La Capelle.
The road has been renamed N 31 between Rouen and Gournay-en-Bray and N 29 between Saint-Quentin and La Capelle.
A downgraded N 30 continues to the north of the autoroute through Bouchain and crossing to the south to go through Douchy-les-Mines and into the town of Valenciennes.
The N 30 continues to the north east passing through the town of Onnaing before reaching the frontier with Belgium.