I have friends with school-age kids ranging from 9-12 years old living in Stockholm, Berlin, Amsterdam, Düsseldorf, Münich, and Milan. Almost all of them go alo

I have friends with school-age kids ranging from 9-12 years old living in Stockholm, Berlin, Amsterdam, Düsseldorf, Münich, and Milan. Almost all of them go alone to school: walking, biking, or using public transport, the only exception is the couple who lives in Milan.