When exiting the Butterfield roundabout (by AL Thompson’s) heading to Camana Bay, who has right of way to merge, if two cars are turning off at the same time? I understood it was always the right-hand lane which had priority, but my Canadian work colleague believed it was the inside lane who had priority.
Auntie’s answer: This actually is pretty straightforward, except your question might confuse people a bit, so I will clear that up first. When on a two-lane roundabout, which is what the Butterfield is, the inside lane is the same as the right-hand lane.
I think your description comes into play as you enter the Esterley Tibbetts Highway (ETH), which starts with two lanes, one containing arrows indicating a merge. That merge lane is the right-hand one.
What this means is that if you exit the roundabout from the inside lane, you would be entering the ETH in the merge lane and so would need to give way to the cars entering on your left.
Here is the Streetskills brochure, which I hope will help to explain the mysteries of the roundabout.