This study was carried out to identify potential sources of stress for bus drivers working for the established operator in a major UK city, six months after the deregulation of bus transport. The focus was to assess the mental health and job satisfaction of the drivers. An interview programme was followed by a questionnaire survey of376 male bus drivers. Major problem areas related to health and home-related concerns, problems intrinsic to the job, lack of involvement and support during the organizational changes occurring and fears regarding physical assault. Existing problems had been intensified as a result of streamlining and increased competition. The bus drivers were found to demonstrate lower levels of job satisfaction and unfavourable scores on mental-health indices when compared to normative samples, which was associated with their work-related stressors. The impact was significantly reduced for those men driving the newer minibuses in contrast to the traditional 72-seater double-decker buses.