A method performed by a vehicle route assessing system for assessing one or more navigation routes of a vehicle in consideration of cellular and/or non-cellular communication of an Internet connection system of said vehicle, said method comprising: determining with support from a navigation system of said vehicle, one or more potential vehicle navigation routes (3, 4) from a start position to a target position; determining respective predicted bandwidth capacity available to said Internet connection system along one or more route sections of the one or more potential routes (3, 4), said respective predicted bandwidth capacity being based on statistical bandwidth data derived from previous data gathered by a remote vehicles management system supporting communication with one or more vehicles, said previous data indicating previous bandwidth capacities experienced by Internet connection systems of vehicles having previously been positioned along, or in vicinity of, said one or more route sections; suggesting out of said one or more potential routes (3, 4), at least a first route determined to be favourable in view of predicted bandwidth capacity available to said Internet connection system; visualizing with support from a digital map of a display of said navigation system, a mapped route reflecting said first route, wherein along said mapped route, the predicted bandwidth capacity available to said Internet connection system for the one or more route sections along said first route, is visualized; the method being characterised in that it further comprises the step of: visualizing a warning indication upon said vehicle approaching a route section of said first route having a predicted bandwidth capacity below a predetermined level threshold, wherein said warning indication is visualized in association with a segment of said mapped route reflecting said route section. determining with support from a navigation system of said vehicle, one or more potential vehicle navigation routes (3, 4) from a start position to a target position; determining respective predicted bandwidth capacity available to said Internet connection system along one or more route sections of the one or more potential routes (3, 4), said respective predicted bandwidth capacity being based on statistical bandwidth data derived from previous data gathered by a remote vehicles management system supporting communication with one or more vehicles, said previous data indicating previous bandwidth capacities experienced by Internet connection systems of vehicles having previously been positioned along, or in vicinity of, said one or more route sections; suggesting out of said one or more potential routes (3, 4), at least a first route determined to be favourable in view of predicted bandwidth capacity available to said Internet connection system; visualizing with support from a digital map of a display of said navigation system, a mapped route reflecting said first route, wherein along said mapped route, the predicted bandwidth capacity available to said Internet connection system for the one or more route sections along said first route, is visualized; the method being characterised in that it further comprises the step of: visualizing a warning indication upon said vehicle approaching a route section of said first route having a predicted bandwidth capacity below a predetermined level threshold, wherein said warning indication is visualized in association with a segment of said mapped route reflecting said route section.