 From Abbeville, the A16 runs parallel to the English Channel and then the North Sea coast.The motorway was built in the 1990s to relieve the congested RN1 between Paris and the Côte d'Opale (Boulogne and Calais).Between L'Isle-Adam and Boulogne it is operated by the Société des Autoroutes du Nord et de l'Est de la France (SANEF) and is tolled.