The problem is not the width; a) they are already broad enough to let lorries turn around easily, b) but they don't have to, as they load and unload via the bow in one port and the stern in the other. The problem with ROBIN HOOD is that the bow offers only a narrow one-lane bow gate and only to the main deck. That's why NILS DACKE doesn't have the same problem in Trelleborg (but probably on the Continent), as she is loading/unloading via the stern there.3 hours for loading is much to much... - then i would try to find other solutions instead of TT, more or bigger ramps inside the ferries and in the harbour, bigger broad/wide of the ferry (the newbuildings has it in compare with the older ferries) that trucks can easy turn inside, more drivers in the port for to move the trailers etc. .
PETER PAN actually has 3600 lane meters on four decks, so in spite of having gates even to upper deck, it does take time.
What definitely consumes time, especially on Stena Line's SKÅNE and MECKLENBURG-VORPOMMERN, but also on the TT-Line ferries, is the increasing number of piggy-backs without trucks, that has to be loaded and unloaded by the tug-masters of the port, even if they put in up to ten such tug-masters on one ferry.