Hand Signals
There is an unspoken code of respect between motorcyclists. There is a specific way that members of biker clubs wave to each other, by extending their hand low instead of high. They also use specific hand signals to warn one another about speed traps, police, or other traffic issues.
Safety in Numbers
Motorcyclists are 27 times more likely to be involved in a fatal accident than those in passenger cars. By riding as a large unit, biker clubs can heighten their visibility, therefore lessening the chance of an accident.