The AH1 sign at the Marine Drive intersection could be interpreted as signifying that the expressway it is attached to is AH1 because the sign does not face traffic on the suggested new route. Plus, because the suggested route joins the expressway at exit 106, I don't see why the route wouldn't get on the expressway at exit 108 which is just a few meters from the turn out of the ferry dock area. Is the suggested change based on the mileage log, because I don't see any signage that is conclusive.