What you need to know to get around the region Friday. And by the way, Mayor Bil de Blasio and Sanitation Commissioner John Doherty warn: stay inside.  It will be COLD.  And with windy conditions and cold, dry snow, even plowed streets can get covered up soon.  Governor Chris Christie is agreeing.  He's declared a state of emergency, and is "encouraging all New Jerseyans to stay off the roads if possible."

And, after a debacle in 2010 when streets didn't get plowed for days and no one knew where the plows were, the city installed GPS responders on sanitation trucks so the city -- and the public can track plows.  Find out which streets have been plowed here.