An order when riding

When they take the streets, the groups can be pretty large. They have a particular order to ride in with the road captain and the charter president in the front. After them, every single line is based on rank and seniority. The members that have been in the club longer will be close to the front, while new members and prospects stay in the back. If one member gets pulled over by the police, everyone in the group stops. By stopping at the same time, the order is kept the same, plus it gives you the idea of how close are the members.