http://www.roadid.com/RoadRules/
Go to the link above and watch the videos they are pretty cool.
The one video that may raise some eyebrows around these parts is called group riding.
It talks about the importance of pointing out road hazards to others in the group.
It specificly says "Point out hazards, Do not call them out as other rides will most likely not understand you"
I believe this to be somewhat true.
Of course doing both is the best and I understand that you cant relay info up
like car back with hand signals.
Any Thoughts ????????