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?
Why would orange indicate? Blue is merging into orange's lane. Orange is going straight. Blue indicates.
I think there are two types of merges, this one is 2 into 1, not left lane ending
This is correct.
There's a video on this page that shows only the blue car signaling.