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?
I noticed the same thing with a local school in Canada.
It could be because kids aren’t within “walking distance” any more, could be because the kids have something to do right after school, could be less bus drivers (because who wants to put up working 4 hours per day for minimum wage dealing with all those kids), or finally just the culture has changed (to driving everywhere).