I came to know from previews and inf about Dominion of Sword Mod that their is problem about how to cross armies over 'in land rivers'(made actually by taking sea into land in thin line form to enable ships to travel in lands assuming they are travelling through rivers). the idea is that wherever road needs to cross river and a bridge is needed, you can put a "green arrrow like path"(as in m2tw vanilla, there is a pass from constantinople towards turks over thin sea line, ships can pass through there, whereas armies can also pass ocean without using ships).
Hope that this will be greatly useful for Modder Team of Dominion of Sword if any other has not mentioned it before me.
if you didnt understand my idea yet, then post quiries here i will try to clarify.
thanks
waiting eagerly for releasing date of mod