But it is not until navigation is restricted that their importance truly catches the eye. Be it ice in winter or a shipping accident: All of a sudden, hundreds of tons of cargo are held up.
Rivers are also used as travel routes for passengers. And as popular places for relaxation. In any case, there is plenty of traffic on waterways.
Traffic which flows more efficiently as modern propulsion and steering technology makes maneuvering safer and more precise. And there are other ways technology is making shipping more efficient such as using the engine waste heat to provide additional energy. Be it in a barge train, a work boat or a yacht.