The aim of this research was to investigate the behaviour of on-road commuter cyclists and their interactions with other road users in urban areas using a helmet-mounted video camera. Cycling is increasing in popularity popular in Australia; however, cyclists are physically vulnerable road users. To date, there has been little research on behavioural risk factors associated with collisions between cyclists and drivers, and much has relied on post-event data. Absent from this approach is an understanding of what contributed to collisions and near-collisions, in particular the behaviour of cyclists and drivers.