+1 for me too. Heading to Alaska - I want to use the Alaskan Marine Highway. At minimum, allow the user to re-route (drag-n-drop) the road route to the Ferry dotted line

A good suggestion. A field saying, "not by car" might go a long way - put a dotted line instead of the normal black line. You could even add things like a plane flight where you move to a different (rental?) car.

me too

Me too!