The old N 31 (now D 931) skirts the Forêt du Parc Saint-Quentin before entering Beauvais. In the town it crosses the N 1 (now numbered the D 1001). To the east of the town is a junction (15) with the A16 autoroute.
The old N 31 (now D 931) borders the Forêt du Parc Saint-Quentin as it approaches Beauvais. In the city, it intersects with the N 1 (now D 1001). To the east of the town is junction number 15, connecting to the A16 autoroute.