Hi mylocat,

I don't think these access tags are the best to use on ferry roads. access=customers and access=private would be more typically be used on the last roads leading to a destination like a residence or a business, not a major state through-route. Routers will take these tags to mean that the roads in question shouldn't be routed on unless they are the last segments of the trip.

I'm going to go ahead and replace those access tags with toll=yes, which will indicate that the roads can't be used without payment while still indicating that they are valid for routing through.