Snowplow sharing the road — Iowa Permit Test

Snowplows typically operate at 25-35 mph, and many drivers hit them from behind.

A plow moves much slower than other traffic, and it is easy to close on it too fast in blowing snow. Expect it to be slow.

Snowplows typically operate at 25-35 mph.

Never pass a snowplow on the shoulder side, because plows move snow to the shoulders.

The plow throws snow toward the shoulder. A car passing there drives straight into that snow and can be buried or pushed off the road.

Never pass on the shoulder side of a plow.

Allow plenty of room when passing a snowplow, because its blades may stick out farther than the plow truck itself.

The blade can reach into the next lane. Passing close can mean hitting a blade you did not expect.

Plow blades may be sticking out further than the width of the plow vehicle.

Snowplows have large blind spots and kick up clouds of snow, so stay back and be patient until you can safely pass.

In the snow cloud you cannot see the plow and its driver cannot see you. Hanging back keeps you out of that hidden zone.

It’s best to stay back and be patient until you can safely pass.

How fast do snowplows typically travel?

25-35 mph. A plow moves much slower than other traffic, and it is easy to close on it too fast in blowing snow. Expect it to be slow. Iowa Driver's License Manual, p.61: “Snowplows typically operate at 25-35 mph.”