Comment by the_other

In the UK we have a great big yellow zig-zag road marking that extends 2/3rds the width of an average car across the road. It means "this is a school, take your car and fuck off". You find it around school gates, to a distance of a few car lengths either side of the gate, and sometimes all along the road beside a school.

It doesn't stop all on street parking beside the school, but it cuts it down a noticeable amount.