I just saw an article about how children get to school. The numbers were (approximately):
65% get driven or drive
25% take the school bus
3% take public transit
Biking and walking had high fatality rates. Buses had the least. The worst though were kids who were driven by a teenager.
I don't think I was ever driven to school as a kid. It was bus, bike or walk. It's probably not a coincidence that biking was my main mode of transportation as a child--and still is.