 The main road of the municipality is the National (now Local) Road n.30 Strada Provinciale 30 di Valle Bormida, passing through the hamlet Piana, in the valley of river Bormida di Spigno.Montechiaro d'Acqui has a train station on the railroad Alessandria-San Giuseppe di Cairo, located in the hamlet Piana.It is served by local trains connecting villages and towns between Alessandria and Savona.