You can’t sync all work schedules but you can match the mode.

Not sure why you think taking kids to school separately and then driving to work is less traffic?

Jobs could still be open later but maybe those jobs would be less attractive to people with kids.

It wouldn’t be a world halting event. It would just mean less traffic, less money spent on childcare, and less stress for families.

France does something somewhat close to this / at least makes an effort to minimize the wide gap between work and school start and end times.