This winter has been particularly crazy in Madison. We have had record amounts of snow (over 80 inches so far) and several cold spells that have included wind chill warnings. We live close to my sons' school so they have always walked to school except in bad weather. I have used a zero degree guideline during the winter so that when the temperature with the wind chill is below zero, I drive them to school. At times, I think I am driving them more than they have been walking this year. Yesterday, after I dropped them off at school, I