Nice one, go kids!
Driving (hell, even cycling, I've been almost squashed more than once) anywhere near a primary school during the start or end of the school day is an absolute nightmare because of all the mum-mobiles fighting to get as close to the gates as they can. They're so stressed about getting their little cherub into their BMW ChildSquasher9000 that they forget to look at the road or their surroundings.
Unless you're in a small rural town or village, most the students at a primary school are within walking distance of school. So let them walk. Give them exercise, freedom, community, fresh air. Get P6s and P7s, brothers and sisters, to walk with P1s and P2s. Or if you're that scared of kid-snatchers, park at home, walk to the school, and walk home with them, get some exercise and fresh air yourself. Or even better, cycle!
I see literally no downsides to this initiative.