Hallu is a commune in the Somme department in Hauts-de-France in northern France. Hallu is situated on the D39 road, some 26 miles so…Hallu is a commune in the Somme department in Hauts-de-France in northern France. Hallu is situated on the D39 road, some 26 miles southeast of Amiens, just a few hundred yards from the A1 autoroute.