During our two driving trips to Alaska I had the habit of waving to on-coming rv's as we traveled the Alaska Highway. The on-coming drivers very, very seldom waved back. When a driver failed to retu...
I see the low wave mostly from cruisers. Sport bikes and touring bikes usually use the 2-finger "V" wave (signifying 2 wheels?). Maybe this is a regional thing? I've been riding since 1960.