MoDOT adjusts its practices to deal differently with each storm and tries to return major roads to near-normal driving
conditions as soon as possible after a storm’s end. Because MoDOT doesn’t have enough workers or trucks to clear every highway immediately after a snowstorm, the department has set priorities for which roads to clear first.
Roads with the highest traffic volumes are plowed or treated first. These roads include interstates and other heavily traveled state routes, which receive ongoing operations in a storm.
Lettered and numbered routes with lower traffic volumes are plowed to allow for two-way traffic, with concentration on hills, curves, and intersections. Traffic on these roads may have more snow on them until the higher-volume roads are mostly clear.
As soon as possible after a storm ends, our goal is to return highest traveled routes to mostly clear conditions and to plow and treat the critical areas of hills, curves and intersections on all other routes.
Even after all the driving lanes are mostly clear though, MODOT's work is not done. Workers now must clean up the accumulation of snow on shoulders, bridge edges and at interchanges during normal working hours.
Interstates and High Volume Roads Plowed to Mostly Clear
- Roads with the highest traffic volumes are plowed or treated first. These roads include interstates and heavily traveled roads.
- Crews will work continuously on these routes until conditions are mostly clear, meaning only a ribbon of snow remains on stripes and shoulders.
- Overnight, emergency crews will monitor for slick spots.
- The following day, during normal business hours, crews will continue to work on these roads and
work more on lower-volume routes.
Mostly Clear Condition
Other State Routes Plowed to Passable
- As soon as possible after a storm ends, our goal is to plow loose snow off the lower volume roads until passable for two-way traffic.
- We will also treat the critical areas of hills, curves and intersections.
Plowed to Passable
More information to help you handle winter driving conditions
Traveler Information Map
Go here to see a map of road conditions for major Missouri
Get driving tips and a list of emergency equipment
How to Keep Your Driveway
There is a right way to shovel your driveway
Road Conditions in States bordering Missouri