Snojoe' polarisrider1 had all the right answers , the one time a hand signal does come in handy is for the groomer operator, especially if your group is not riding tight, I just don't understand what is so hard about riding on the trails, it is, I assume ,the same rules as driving down the highway, what I don't get is when you ride down the middle never to look back, ( which shoukld be the #1 rule if no one is behind you, stop and wait or go back , they must be broke, took a wrong turn or had a mother nature call ),or you park in the middle or barely off to the side, or park double and stand all over the trail, or park on a corner, what's that about? Or your drag racing side by side on a corner??? Or when you come upon a group that is parked or driving extremly slow, you pass them full throttle to spray them down with loose snow,ice chunks,rocks etc. very impressive! Common sense is what should be used on the trails,along with common courtisey.