I don’t think he was oblivious. While driving on 80/94 in heavy traffic, I was behind a truck and a car with an older woman driving the car. She continually tried to pass the truck on the shoulder. Each time, the truck would drift onto the shoulder to prevent this. Eventually, the woman decides to go for it and the truck moves over crushing the car between the truck and the retaining wall, disabling the car. The truck drove on, as did I.
What is it with drivers these days?! Where I am, the shoulder area is seen as another lane. Did they forget that one is supposed to pass on the left?