There is apparently a phenomenon in the US now, where parents drive to the school individually to pick up and drop off their children at the beginning and end of the day. Some people I work with even take time off from working to do this. When the parents descend on the school each day there’s insane traffic, cars lined up for miles, all idling their engines. What happened to school buses?
When I was a teacher, the main reason so many students were dropped off and picked up at my school was because of what we call “School of Choice.” Essentially instead of parents being required to send their kid to the school their home is zoned for, they can send their kid to any school in the district, but if they do, they have to provide transportation.