I used to take the same way to work every day. After a while you see the same faces again and again. Day after day. It was grinding. It can get awkward at times.
For example there used to be the same rough beaten up old van with a real asshole of a driver at least once a week in front of me. I saw him pulled over one morning, then he never showed back up.
I pass 20/30 cars on cue in the mornings and evenings. I just wonder about the people really. Occasionally I make up stories about their lives.