<p>The choice set and the associated differences in choice behavior are often captured by assuming the choice set to be latent. However, such model structures are of limited use for practitioners and policymakers and might not help frame choice set specific policies. In the absence of empirical application/calibration of model structures that capture behavioral differences among commuters whose choice set vary, choice set specific behavioral investigations and more meaningful choice set specific policy proposals might be challenging to achieve. Under such circumstances, a deterministic choice set model which classifies commuters based on choice set differences would aid in analyzing the behavioral difference among these segments. In this regard, the paper attempts to develop a mode choice model which captures the differential choice behavior across various choice set groups – captive commuters, commuters who do not have access to either personal vehicle or public transport, and those who have access to both. It also attempts to propose target segment (choice set group) based policies to promote sustainable modes. Evident behavioral differences in the choice of work mode were observed among these choice set groups. It was found that non-captive commuters could be attracted to company bus/cab by subsidizing its monthly fare Commuters who have access to both personal vehicle(s) and public transport were the responsive target segment that might shift to bus and metro on providing new routes and free metro cards, respectively.</p>