The Missouri Department of Transportation Monday kicked off their annual Pothole Patrol.
During the campaign, MoDOT will fill all reported potholes on state maintained roadways within 24 hours.
During last year's Pothole Patrol, MoDOT filled over 75,000 potholes statewide. That number could grow this year because of the harsh winter.
Potholes are formed when water gets under the road, freezes and expands, then thaws and leaves a weak spot. Those weakend areas then get lifted away by cars and snow plows.
"It's never-ending, trying to keep up on them...it's one right after the other. Places we've never had them before either," MoDOT Senior Maintenance Worker Kent Cunningham said of this year's potholes.
To patch a pothole, crews first sweep debris from the hole, pour oil in it, then add asphalt and smooth it over. To pack it into the ground, they back over the spot in a truck.
So far this winter, MoDOT has spent $62 million on road maintenance statewide; that's about $20 million more than the average of the last five years.
MoDOT also reminds drivers to be aware of workers on the highways and shoulders.