Special Weather Statement issued December 23 at 8:33PM EST by NWS

…Areas of Black Ice possible tonight… Temperatures are forecast to eventually drop back below freezing tonight. Initially wet surfaces combined with freezing temperatures, will lead to areas of black ice on untreated surfaces. Elevated roadways such as bridges and overpasses, highway on and off ramps, as well as sidewalks, driveways and

Source: National Weather Service Alerts for Vermont