After the conquering armies of Domitius Aenobarbus, the land was settled and divided into sections of 710m sides. Parcels thus divided were allocated to settlers who often gave their names to the site. Indications of the original Roman occupier can be found from the present day naming of some villages where a suffix of '-an' or '-o' was added to his name. Thus the present day Siran is named from the villa of Sirius.

With the subdivision of the lands and the creation of secondary road systems, a new prosperity was established which perhaps bypassed the settlements still remaining on the oppida in the area. The road structure created from the primary route, the Via Domitia, was dense and indicative of the prosperity and level of economic activity achieved under the Romans. Since the minor roads were only made of packed stone, little remains of them today except their memory in terms of land divisions which used the roads as boundaries as for example, the limits of the church dioceses, commune boundaries and later the departments.

The Minervois was crossed East-West by the main route from Arles to Toulouse which passes through Ginestas, Sainte-Valière, Olonzac, Saint-Frichoux, Malves. Another road, further north and roughly parallel to this first one, passes through Agel, Aigne, Azillanet, Siran, Saint-Jean-d'Ognon, Trausse.

Two main roads ran North-South to link the plain with the mountains : one running through Oupia, Beaufort, Cesseras, Saint-Julien-des-Molières and called the 'chemin de la montagne. The second, called 'la voie romaine', crosses the Aude near Bassanel then goes to Pepieux, Siran, to Saint-Julien.