Wednesday night temperatures were so low, that crews couldn't pre-treat the roads. Add in a little sun glare, a few accidents in key spots and late school openings and it proved to be a recipe for gridlock for commuters.
The state warns todays evening commute could be just as dicey if the snow hits as schools let out.
"The main goal with the crews is after the precipitation stops, we want to get to bare pavement in four hours. So people need to have realistic expectations when they're going out," said a spokesperson for the Maryland Highway Administration.
The state highway administration offers these tips for drivers this morning:
Fill your gas tank
Make sure you have window washer fluid, an ice scraper, a charged cell phone
Have an alternate travel plan if crashes or other incidents block your normal route
Leave yourself plenty of time to arrive at your destination.