mean dad
verum super omnia
There is no reason for it to be 1/4 mile, that was just an observation that with 1/4 mile remaining everybody had already merged.
What is your preference? That they merge right up to the single lane?
Why are you stressing on '84 car lengths'? What have you lost with everybody merging well before the single lane? You think they're stupid?
Average car length is 15.75 feet. 1320 divided by 15.75 rounds up to 84 car lengths.
You brought up the 1/4 mile measurement and when you were countered that it was too early to merge, you immediately imply that the only other choice is to wait until the last minute and slam on brakes.
Ridiculous.
And as to time saved, two lanes move more cars than one. Period. Assuming there are no assholes waiting until the last minute and slamming on their brakes and causing issues, the shorter the distance traveled in one lane instead of two, the better for everyone.
I kept getting lost in Washington DC with all those streets leading in/out of those roundabouts! 



