The increase in traffic is because more households need both parents to work.
Hence they are generally in cars.
It's not fun the school run you know people don't do it once their child finishes school. Little ones can't walk on their own.
Yes you can ask the Head to suggest carpooling but realistically it's not going to happen unless their journeys are identical.
If the cars are using the roads legally there is absolutely nothing you or the head can do. Not even the police.
You could ask the school if there is somewhere you could keep a bicycle on their grounds perhaps.
One parent and one child means two passengers that is double most cars.
Get a book. Enjoy the extra 15 minutes reading. Find some podcasts, watch the world go by. You need to change your mindset about this situation. You are going to be stuck in the bus for an extra 15 minutes most school days.
Most people's commute is longer than 25 minutes you are quite lucky really.
As much as we all want the roads to ourselves that just doesn't happen if the roads are clear I can do a circular drop and back to school in 17 minutes but when there are other cars on the road going to work/school and the annoying buses which are so slow changing lanes and at roundabouts it takes 45 minutes so a greater increase than your 15 minutes and I have to do the driving I can't even read. All those other bloody people going places they have to the roads should be just for me me me......