The participants were asked to indicate how
often they had committed each of the violations during the
past 6 months using a 5-point Likert scale ranging from 1
(never) to 5 (very often). A high score indicates a greater
degree of driving-violation behaviour.
A total of 774 questionnaires were sent out, of which 621
were returned fully completed. This resulted in a response
rate of 80.23%. All participants replied to the questionnaire
anonymously and voluntarily.