Understanding the factors influencing public transport mode choice behavior of Vietnamese motorcyclists

Many previous studies evaluated modal choices of car and public transport users. In contrast, there are very few studies on modal choice in motorcycle dominant countries like Vietnam. Thus, this paper reviews studies on travel mode choice to identify factors influencing mode choice in Vietnam. Most of the frameworks in previous studies divide boundaries between different levels such as the utility function, social-ecological system, socio-demographics, and psychology. These frameworks also list objective factors (gender, age, ethnicity, etc.) and subjective factors (attitudes, subjective norms, perceived behavioural control, etc.) within each level but rarely provide the interactions among them. Therefore, this study discusses the challenges in the travel mode choice and attempts to introduce a model linking objective factors and subjective factors in understanding the modal choices of the Vietnamese population.