Yellow drivers in very slow moving traffic. Blue cars all moving with no traffic. This means that the queue of pink cars turning right can be quite long (maybe 10 cars long).
Grey cars turning left always get out quite quickly as the blue cars have no traffic.
I notice quite a few cars that are turning right at this junction join the queue of grey cars rather than pink. (EG. The grey car circled). This slows down the people turning left as obviously these people need to wait for somebody in the yellow queue to let them in. They obviously join this queue as it’s much quicker moving than the pink queue (as the majority are turning left).
AIBU in thinking the way this junction is designed is so that the people turning left can do so quickly without having to wait for gaps in the traffic for people turning right?
The central island is fairly big and contains many trees. My drawing is quite a bit out of scale - the middle island is probably three full road widths in size.