DMcG I was talking about the present situation. Your contribution assumes a change in the status quo. It is patently obvious that a change could conceivably modify the present economic model.
I could be wrong but I believe the present schedule of the superferry to europe carries primarily tanks and trailers and few tractor units.
Who wants a tractor unit trapped on a ferry for 80 hours per round trip?
But not every truck is an artic. in fact they are a minority.