Rising traffic congestion and severe air pollution in urban areas have led policymakers to find appropriate strategies to encourage the use of sustainable modes.Conventional mode choice models assume that the set of alternatives or modes of travel available is the same for all individuals. These studies are also based on a one-time cross-sectional choice and do not consider the use of multiple modes for a more extended period. However, such assumptions are behaviorally unrealistic as individuals may not consider some modes due to unavailability or lack of information etc. Furthermore, it is not uncommon for individuals to shift modes over different days. Thus, individuals may consider multiple modes for the work commute but choose only one mode as a primary mode. Among these individuals, some may decide tochoose another mode occasionally, depending on the situation at the time of travel.In this context, this study investigates the three choice dimensions of interest a) consideration, b) primary mode choice, and c) secondary mode choice. As these three choice dimensions are interdependent due to common and persistent psychological attributes and modal service characteristics, they need to be modeled jointly. The dimensions investigated in this study are analyzed using data of workers from Chennai, India. Modeling consideration of public transit and primary mode choice jointly captures two different sources or endogeneity. Firstly,at the unobserved level, a positive correlation between the consideration of bus and train is obtained. Secondly,a positive structural effect of consideration on primary mode choice is captured.Modeling consideration of sustainable modes and secondary mode choice show significant endogeneity, state-dependence, and unobserved correlation across the choice dimensions. The results also show that some of the factors affected both the consideration and choice decisions, thus providing evidence that there is a partial (not full) mediation effect of consideration on choice. Also, the degree of vehicle availability and accessibility to transit stations exhibit varied effects in the choice of bus and train as primary modes. Lastly, perceptions regarding walkability and environmental impacts of travel modes affect only the consideration of sustainable modes, while vehicle ownership and accessibility to transit affect all choice dimensions. The findings from this study can help encourage the use of sustainable modes through different strategies for different levels of mode choice.