"There is a lot that still can be done in terms of efficiency, not only on the terminal side, but also the ability to deliver boxes to customers," CEO Rolf Habben Jansen told analysts in an earnings call.

"That would allow us to get rid of some of the congestion," he said of the disruptions resulting from unexpected demand spurts, labour shortages and traffic snarl-ups amid the coronavirus pandemic.

(Reporting by Vera Eckert; Editing by Zuzanna Szymanska)