Here is an interesting short article from the Nov 2012 issue of Tire Technology International about indoor winter tire testing at Test World in Ivalo, Finland.
http://viewer.zmags.com/publication/cc7bad6e#/cc7bad6e/56
The average S.D. for outdoor ice braking tests is 4.7%, but in their new indoor facility, the S.D. is lowered to 3.0%
http://viewer.zmags.com/publication/cc7bad6e#/cc7bad6e/56
The average S.D. for outdoor ice braking tests is 4.7%, but in their new indoor facility, the S.D. is lowered to 3.0%