(KMOV.com) -- In Jefferson County crews face the daunting task of covering 680 miles of rural roads.
The variety of roads- hills and valleys- and a variety of weather each part of the county is getting, makes it a real challenge.
After pre treating the roads Wednesday with brine and calcium chloride, crews were spreading a mixture of salt and cinders Thursday. The cinders improve traction for car tires.
Drivers are working 12 hour shifts crisscrossing the county in 34 trucks to treat all the 418 roads and 150 bridges.
The combination of treating roads and steady traffic helps keep the roads clear, but when the sun goes down and traffic gets lighter the risk of black ice goes up.
“It will come down to the effects of our pre treating, more than likely it will not be an issue till the dawn,” said Jefferson County Public Works Director Jason Jonas. “Again we will be running 12 hour cycles. We’re going to just try to stay on top of it.”