Alcohol in almost all cases.
I considered that.
It was just after noon.
Not that people don’t drink before noon.
It was a vehicle in MN with Iowa plates.
We all get confused.
;-)
Occasionally it’s just the driver’s lack of familiarity with the road. I once found myself in this situation in the KC suburbs. It was very dark, and I took a left turn at a stop sign onto what I thought was a two lane street. Turned it had four lanes with a very low curb in the middle. After a couple of oncoming cars flashed their bright lights at me, I realized my mistake and drove over the curb into the correct lane. I was cold sober in an strange part of town, and it scared the crap of out me. Thank goodness traffic was very light.