I have one of these almost finished. I only need a mast and then knock up a body shell/seat arrangement. I also have most of the parts for a second one. These things will cruise easily at 50 mph and if you push it, you can get over 60 mph on the beach. I saw on TV where a group of these crossed the Sahara Desert with little trouble. I would love to fit skis on mine and take it to the snow fields. Main problem here is there is very little flat country and not much consistent wind in the snow areas. The speed available is at least 3 times the wind speed. With ice skates, they do over 100mph. On snow, I would think they would do a minimum of 50 mph. If I lived in the US, I would sail/drive it along the long paddock when the roads were all blocked or even on the snow covered roads. At least if you were running it in the long paddock, you wouldn't hit any cars. As for stopping, yes, they do stop or you can do a 180 in twice its length and then stop. They can also carry two people at 60 mph. I would love to try it out on the snow.

I had a video of two people sitting in tandem doing 60 mph on the beach somewhere. They did a 180 to stop, very exciting stuff. If I can find the video, I will post it for you to see.
Kody
Never be afraid to ask questions here, Prov. 11:14