Here is the network of motorways
A1: to drive from Milan to Naples via Bologna, Florence, Rome.
A4: to drive from Turin to Trieste via Milan, Bergamo and Brescia.
A7: to drive from to Genoa via Pavia and Voghera.
A8: to drive from Milan to Varese.
A9: to drive from Lainate to Ponte Chiasso and Switzerland, passing through Como.
A21: to drive from Turin to Brescia via Voghera, Piacenza and Cremona.
A22: to drive from Modena to the Brenner pass via Mantova.