TMR put this up on their Facebook asking who has to give way, but that's too easy. A much more complicated question is: what does the law say around indicating?
I've seen people say only blue must indicate, others say both must indicate, and yet others say neither must indicate. Which is correct?
I think you're imagining these sort of "two merge into one but you have to guess which" lanes. I'm not sure but i think you might.
The image clearly shows the blue lane merging into the orange, not them "merging equally."
But on that note we do have a sign showing that people need to join "like a zipper" as it were, taking turns.
So it'd depend on which lane last had a person merge.
But this is in Finland. Dk bout straya