text: I used my Garmin on this intersection and I *really* disliked the instructions it gave me.  Looking at the current intersection layout, I can see why it described it the way it did -- the road is not a dual carriageway at any point on the bridge.  Not sure if it's a good idea to fix it for a specific router, but the two ideas are 1: to make the bridge dual carriageway even though it 's not (one wouldn't be making uturns on it anyway) or 2: make the road single carriageway just before or at the motorway links - but this would mean the road may be drawn on the island.  Yuck.  Might have to leave and live with it...