Translate the following English sentence to French:
"If those involved take up their responsibilities, we are bound to conclude in a number of years what the Netherlands already knows: "Transport by sea, the best route" !"
Lorsque les parties impliquées prendront leurs responsabilités, on ne pourra que conclure ce que l'on sait déjà aux Pays-Bas : "le transport sur l'eau, la meilleure voie" !