Originally Posted by macro
Good points. I can't disagree.
In that case, why couldn't they just enclose the whole thing like a tube at a water park? Make the top half clear so they'd still be visible. It seems like common sense to me, but I admittedly know nothing at all about this sport.
Frost. It really is impractical to enclose the track when you consider the excess heat that the track would maintain. Then you have the temperature of the ice and freezing that. If they enclosed the track I am pretty sure the clear top would be full of frost and have very little viability.