The purpose of riding in an organized group instead of an undisciplined pack is to provide the additional safety that a well-organized group inherently generates. This comes from within the group and from the outside. When a group rides in an orderly fashion, people don't get in each others way, and the organization of the formation itself discourages cars from attempting to cut in. I have seen trucks move to the far side of their lane to minimize wind blast when they see a well-ordered formation "single up" and move as far away from the truck as their lane allows. Once riding rules have been adopted by a group, EVERYONE riding with that group is expected to follow them. Anyone violating the rules and compromising everyone's safety, will be warned, and if their actions continue , will no longer be welcome to ride with the group. The following rules are compiled from a number of sources. Most groups that ride in orderly formations follow similar rules. Details may vary from one group to another, sometimes because of the style of riding they do, or sometimes because there are a number of reasonable options, so they choose the one they prefer.