As somebody who has once lived next to a major crossroads in a big German city. When I sat at my balcony after wiping a layer of black dust from the table and chair I could witness the daily spectacle of the commuter induced traffic jams.
The most surprising finding for me was how rare one could see more than one person in a car. Most of the traffic where you saw more than one person inside was vans with workers of some kind. Regular cars were mostly just the driver with their personal 6m².
If cars didn’t exist and we had to come up with a system of individual transportation today, it wouldn’t look anything like a car. And I think one can see that more clearly living in Europe, where most cities weren’t designed with cars in mind.