This is more like. Keep the routes seperate, as having it one constant route makes it a bit unfocused.
One A route from Ourimbah to Gosford, one B route weaving around Woy Woy / Empire Bay.
While we’re at it, can we remove B83 from the old highway between Cowan and Somersby? Unrelated but it’s a pretty unused road, it has no need to hold a state route number as it’s essentially a D route (which it’s already signposted as)