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Caen is connected to the rest of France by motorways to Paris (A13), Brittany and Southern France (A84) and to Le Mans and central France (A88–A28). The A13 and A88 are toll roads while the A84 is a toll-free motorway. The city is encircled by the N814 ring-road (Boulevard Périphérique) that was completed in the late 1990s. The N13 connects Caen to Cherbourg and to Paris. A section of the former N13 (Caen-Paris) is now D613 (in Calvados) following road renumbering. The Boulevard Périphérique includes an impressive viaduct called the that goes over the canal and River Orne. The canal links the city to the sea to permit cargo ships and ferries to dock in the port of Caen. Ferries which have docked include the "Quiberon" and the "Duc de Normandie".