Looks like a long night if folks are not at home by now.
http://denver.rockymountainnews.com/news/traffic/index.shtml#10
Blowing snow is whipping across the Colorado plains and along the Front Range, and Interstate 70 is closed from Airport Road in Denver all the way east to Kansas.
I-25 is closed from Pueblo to the New Mexico border and from Colorado Springs to Castle Rock.
Colorado 23 between Holyoke and Nebraska, U.S. 385 between Burlington and Cheyenne Wells, and U.S. 6 paralleling I-70 have all been closed as well...
If it weren't for the many different driving styles in the cities down there,... Most roads on the Range get plowed and sanded in spots. We drive over a few miles of unplowed, unsanded, paved road with an inch or two of ice on it for a few days every year, and there are no problems there. All of the long-term neighbors are accustomed to driving on it.