What is Breaking time on icy roads for cars driving?

To answer your question properly, you must provide additional information such as: 1. Approximate weight of car including passanger(s). 2. The speed you are travelling at when you commence to break. 3. What kind of tires are on the car such as suumer; all-season; regular snow; or studded winter tires? 4. If you have winter tires, are they on all 4 wheels or just 2 wheels? 5. Is the car a front or rear wheel drive?