Just entering Iowa

We decided to take 169 down through Mankato. Then we took some other road (not sure what it is, I am not driving) from Mankato that would take us to the northwestern corner of Iowa. We are going to stop for lunch somewhere soon. This part of Minnesota it sure is flat. All it is, is fields for as long as the eye can see. Every time we get into a part of the road that goes down to 2 lanes we get stuck behind a semi, either hauling livestock or grain.