Vianen is a municipality and a city in the central Netherlands, in the province of Utrecht. It is the only municipality in Utrecht located south of the Lek River. Before 2002 it was part of the province of South Holland. Vianen is bordered by two major motorways leading to Utrecht: the A2 (Amsterdam-Maastricht) on its west, and the A27 (Breda-Almere) just east of the town. Both roads can be notoriously congested near Vianen during peak commute hours.