Silly Question!!
I've watched Cycling (plus raced some road and circuit races for some years) for donkeys years and never quite worked out why do breakaways seem to ride Double line? In a TTT they usually ride in a single line (like on the track) and then there'd be only one guy on the front. I know one line is returning to the back so easing off but they're still in the wind.
Never understood the double line. :roll:
Never understood the double line. :roll:

“Life is like riding a bicycle. To keep your balance you must keep moving”- Albert Einstein
"You can't ride the Tour de France on mineral water."
-Jacques Anquetil
"You can't ride the Tour de France on mineral water."
-Jacques Anquetil
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https://www.youtube.com/watch?v=kWEoBFkwsc0
The direction of rotation should be chosen so the line dropping back shields the faster line from the wind.
It's a bit weird though as millions are spent to decrease drag and then they choose to double the frontal area. I guess going through towns etc then a single line may go across the road in an echelon and become difficult where it gets a bit technical. A more compact group would be less wide. But out on the open wider roads then a single line would be more efficient.
"You can't ride the Tour de France on mineral water."
-Jacques Anquetil
This:
In a single file pace line one rider normally spends a lot longer on the front, in a chaingang you are only really on the front for a few seconds, which makes it easier to keep up for a long time.
"You can't ride the Tour de France on mineral water."
-Jacques Anquetil