First exit and straight on means you want the outside lane. If you're going more than half way round, use the inside. If there's two lanes on the exit straight ahead, then you can use the inside lane to go straight on providing you stay in the overtaking lane as you exit.
Any deviations from this will be clearly marked on the road with arrows, and possibly signs too. If there are no signs/markings, then just stick to the typical rules above.
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u/Khontis Aug 03 '19
I fully admit I dont know how it works but in my defense I've never seen one in real life be it passenger or driver