Remember that old driving school advice that bridges freeze before roads? Well, it's true (and it happens because bridges lose heat from both above and below, unlike roads, which are insulated by the earth), and it's a major problem for highway officials who want to ensure safe driving for their communities.  See full article.

  Remember that old driving school advice that bridges freeze before roads? Well, it's true (and it happens because bridges lose heat from both above and below, unlike roads, which are insulated by the earth), and it's a major problem for highway officials who want to ensure safe driving for their communities.  See full article.