Sweepers. They are ahead. Except I didn't see them. Sweepers sounded like something that might present an interesting challenge to a cyclist. Have you run into sweepers? Were they large, medium, or small? Were there clouds of dust? Brooms which threatened? Were they fixed in place, or mobile? Did they move in a pack, or singular (SWEEPER AHEAD). I may have to go out there on a work day, to see them in action. Get up. Go ride.