Two lanes into one, one merging point, after you after me, smooth and simple with minimum disruptions.
Two lanes into one, multiple merging points over half a mile, chaos, people carving in all over the place, harsh braking as people get cut up, the self-righteous intentionally blocking both lanes at whatever arbitrary point they’ve decided is ‘right’, stress, road rage.
What is there to gain by piling into one line ages before the junction, other than to double the length of the queue (and thus the pinch point)? The road’s open for a reason. Use it.
+1