> First of all, the possibility of ice is obvious. No warning is needed. That is just silly. Partly correct. Yes, the possibility may be in part obvious by con

> First of all, the possibility of ice is obvious. No warning is needed. That is just silly. Partly correct. Yes, the possibility may be in part obvious by conditions such as temperature. But I think most people who are used to driving on icy conditions can tell you that the ice may still come as a surprise. A system that could _reliably_ warn about slippery conditions would be good.