Not much else to say. The lower-end of the temperature range that was possible was realized tonight and thus, roads are exceptionally slick and hazardous out there across much of Oklahoma (and soon to the North and East).
No vehicle is set up to stop on a sheet of ice, so driving is going to be an especially troublesome experience. The Oklahoma City Police Department is reportedly not responding to non-injury accidents at this hour. So it’s a good idea to stay home through tomorrow morning when the temps get above freezing again.