Economic poles and axes

The Val d'Oise department has mutually complementary economic poles:
- in the heart of the Plaine de France area, opening of the A 16 motorway has caused the current expansion of activity zones along the RN 1 between Deuil-la-Barre, Domont, and Monsoult, built near quality urban centres,

- the " Vallée de Montmorency " is above all a much sought-after residential area, but the human-scale activity zones located along the RER suburban train route also provide a fabric rich with specialised small and medium sized firms and companies: high technology and subcontracting in mechanics, plastics, and electronics.