Originally Posted by
Machka
I don't know what you mean.
Participants can use whatever navigation systems they like. A number of years ago, it was maps and know-how. More recently, people might be able to use GPS, I'm not sure. GPS might be useful, but then again, GPS might not take people down the little back alleys and connector paths.
What I'm basically asking is whether people put together competitive navigation system that allow really fast cyclists to dominate in a race without having personal familiarity with the route from experience. It would be difficult to put together really good routes with all the shortcuts, etc. you mention, and to make it work in a way that it wouldn't slow you down to pay attention to it while racing.