In view of the fact that it's always slippery when wet(as advised)enquire from tower the latest 'braking' pireps,or where did they(the proceeding traffic) clear the runway...In view of the fact that no authority 'certifies' to ICY'conditions- don't go there.All one can rely on are the latest comments of 'experienced' conditions......For the landing case and on Taxiing out......
