Gas, pollution, health, schools, parents

Some facts that seem to be related.
1. Gas prices are still high and driving, particularly for short hops, is expensive.
2. Automobiles are a source of pollution.
3. Parents are busy people.
4. "More than 80% of kids ages 11 to 17 surveyed in the Alberta study had one or more risk factors..[for Type 2 diabetes] because they were inactive….[and did not eat healthily]. [Vancouver Sun 2009-03-13].
5. Elementary schools are located to be within easy walking distance of the area they serve.
Now here is the observation that seems to me to be out of place.
I live across the street from an elementary school and twice each day there is
heavy traffic with children being dropped off or picked up. Each day I ask myself "why?".