(KMOV.com) - Road crews in Missouri and Illinois were working through the night in preparing for an icy Presidents Day.
Cold temperatures and rain gave St. Louis area roads a coating of ice Monday morning.
The Missouri Department of Transportation said they had about 210 salt trucks out before dawn pre-treating highways. Officials said St. Charles County roads were the biggest issue after getting the heaviest pockets of freezing rain.
Officials told News 4 crews were "chasing the radar" to determine where to focus their efforts.
The Illinois Department of Transportation says state roads already had a salt coating left from Friday. Crews started treating the roadways around 4 a.m. IDOT officials said road conditions varied greatly from one area to the next.
In St. Louis, streets director Todd Waelterman said the department had dumped about 60,000 gallons of brine salt water on its snow routes and were continuing to treat city streets. Waelterman said the city had about 50 trucks on duty at one point.
MoDOT officials advised motorists who have to travel in the St. Louis area to delay driving or to leave extra time because of the icy conditions.