The DOT tried to stay ahead of the freezing rain Thursday evening but there was little they could do as a thin layer of ice covered everything.
The slick conditions made for a tough commute for motorists. The National Weather Service urged drivers to exercise caution and slow down to avoid accidents.
The slick roads sent a number of commuters sliding, including a driver who crashed on the Highway 5 bridge passing over Hwy 28.
Things got even worse the further west drivers went.
Cars were backed up for miles on I-80 as accidents and ice slowed everyone down.
At least one person was killed Thursday on Iowa roads.
A Wisconsin man rolled his truck in Pottawattamie County around noon just as the freezing rain started to fall.
DOT trucks are still out Thursday applying de-icing chemicals and spreading sand for traction.
You can check out the latest road conditions here.