This study uses structural equation modeling to test a model hypothesizing the impacts of overload and non-participation on job strain, turnover and commitment of urban transit drivers. The study sample comprises 331 responses from transit drivers from bus companies in Australia. The results show that non-participation has a direct and negative impact on organizational commitment while role overload has a direct and positive influence on intent to leave. An unexpected finding is that while overload and non-participation have significant positive impacts on job strain, there is no significant relationship between strain and organizational commitment. The implications are that work-related stressors appear to influence the organizational commitment and intent to leave of transit drivers directly rather than indirectly through job strain. Role overload and non-participation have not often been considered in the context of the commitment and intent to leave in stressful occupations such as urban transit driving.