Obey the rules of the road. Conduct yourself with the same consideration as you would expect from any other road user, particularly motorists. Aggressive behaviour and gestures by cyclists will alienate motorists and could lead to endangering other cyclists. Know and use all the basic hand signals.
Traffic: Lead rider must take responsibility for those behind when approaching turns, intersections, transitions from multi-lane to single-lane etc.
Traffic lights and stop signs: Do not cross an intersection, even if the traffic light is green, unless you are sure that the whole group will be able to cross safely before the light changes.
If the group becomes split at a traffic light, the leading riders should then slow, or stop in a safe place, to allow riders to re-group.
Crossing major highways and uncontrolled intersections: Do not act individually. Car drivers see the group as one entity and expect it to act as one.
The rider at the front takes charge directing everyone not to cross until there is a gap in traffic large enough for the entire group to safely cross the road.
Do not hold up following traffic: Ride single file on single-lane and busy roads where motor vehicles are frequently coming past.
On occasion, you must "take the lane" for your own safety. This is both legal and practical (such as a narrowed construction zone).
Your ID and emergency Contact Info Should be on you for every ride and easily accessible.