If your talking race situations etc, sure but most group rides simply rotate the same way almost all the time (2 person wide pacelines).
Originally 2-up pacelines had the two front riders peel off on their own sides and then drift back on the left and ride sides of the pace line. It had been done this way for years. Locally here in Ontario, where 2-up riding is allowed, this was what was done. Then a few years ago, most of the clubs decided to use a different approach and the Ontario Cycling Assoc. suggested it as official group ride protocol for all sanctioned clubs. Reason for the change - when the two riders at the front would peel off, you then were really riding FOUR abreast for a time until you reached the back.
Now most of the bigger clubs, for 2-up riding use more of what would look like an echelon turn-over at the front. The rider on the right at the front stays were he/she is. The rider on the left side moves up and slides over to the right side and leads momentarily the left line, and then the two following riders in the left line move up, the first one taking the lead position on the right line and the following riders takes the lead position on the left line. This way, you are truly never more than 2 riders wide.
So you are always working yourself backwards in the group when you are in the right line near the edge of the road, and forward in the line if you are in the left line. A nice side benefit of this is you get to talk with more people in the group as you are frequently changing who you are riding side-by-side with.
Steve Fleck @stevefleck | Blog
Originally 2-up pacelines had the two front riders peel off on their own sides and then drift back on the left and ride sides of the pace line. It had been done this way for years. Locally here in Ontario, where 2-up riding is allowed, this was what was done. Then a few years ago, most of the clubs decided to use a different approach and the Ontario Cycling Assoc. suggested it as official group ride protocol for all sanctioned clubs. Reason for the change - when the two riders at the front would peel off, you then were really riding FOUR abreast for a time until you reached the back.
Now most of the bigger clubs, for 2-up riding use more of what would look like an echelon turn-over at the front. The rider on the right at the front stays were he/she is. The rider on the left side moves up and slides over to the right side and leads momentarily the left line, and then the two following riders in the left line move up, the first one taking the lead position on the right line and the following riders takes the lead position on the left line. This way, you are truly never more than 2 riders wide.
So you are always working yourself backwards in the group when you are in the right line near the edge of the road, and forward in the line if you are in the left line. A nice side benefit of this is you get to talk with more people in the group as you are frequently changing who you are riding side-by-side with.
Steve Fleck @stevefleck | Blog