Thanks 
The traffic on Mississippi, Amazonas, Columbia River, Rio de la Plata, Panama Channel, the Great Lakes is there hidden under the water due to a bug in the sim making all water sim objects stick to ground level. As mentioned on the Lakes it can be fixed and I will most likely do this with a temporary package, which can be uninstalled the day Asobo corrects the bug - for the rivers it is more complicated but once I get time to do some geographic studies I think something can be worked out. Taking it to more rivers like e.g. the Rhein would require new models. so that is not immediately on the list.