In order to study which factors are important in children’s cycling an experiment with 144 children between the ages of and 13 was carried out in which skills in manoeuvring, accelerating and braking were tested. The tests, conducted at nine separate stations, were intended to measure behaviour which is actually occuring in traffic situations, e.g. the ability to look backwards while cycling. After the tests, each subject was interviewed about his cycling habits, attitudes and any accidents he may have had.