Advanced Traveller Information Systems (ATIS) help in improving the overall traffic performance of the network by providing travellers with information about rapidly changing traffic conditions, thus enabling them to avoid delays and dangerous situations. Quantifying the benefits provided by these systems requires knowledge of the type and quality of the information and user response. Owing to the lack of fully operational ATIS deployments, very few studies on travel behaviour and response to ATIS have been reported for heterogeneous traffic conditions. This study investigates travellers’ responses to different information types and contents, on route choice and departure time choice behaviour using stated preference data from a travel simulator. Respondents are provided with quantitative and qualitative information along with information on source of delay and magnitude of delay on their chosen O-D pairs along a study corridor. Analysis of the collected data is carried out using discrete choice models. The results illustrate that travel time savings and variability are major determinants of route choice behaviour, whereas for departure time choice, information states and source of delay are critical in deciding the responses. Sources of heterogeneity in the choice decisions are identified. The effect of different modes of travel on these responses are also evaluated. The findings from this study can assist in the design of information services and ATIS deployments for mixed traffic conditions.