This report describes the results of an extensive online survey that has been conducted to collect empirical data on the psychological determinants and barriers of a travel mode shift in favour of active transport modes. The modes that have been focused on are walking, cycling and the use of Personal e-Transporters (PeTs) (e.g. electric scooter, monowheel, Segway,…). The survey was conducted in nine cities spread over the four countries of the consortium partners involved in the ISAAC-project: Tilburg and Groningen (The Netherlands), Ghent and Liège (Belgium), Trondheim and Bergen (Norway), and Dortmund, Düsseldorf and Berlin (Germany). A representative sample (in terms of age and gender) of 250 respondents per city was interviewed. The aim is to better understand people’s travel mode choices, and to investigate how the use of more sustainable active transport modes can be increased. A factor and cluster analysis was conducted to identify coherent groups of participants that are similar to each other regarding psychological determinants of travel mode choice, but different from participants in other groups. Two clusters of participants with similar psychological determinants of travel mode choice were identified. The difference between both clusters was mostly explained by cycling related factors. As a result, a clear ‘pro-cycling’ cluster was identified (55.6% of participants in the sample), consisting of people with more favourable cycling-related factors, and a ‘non-pro-cycling’ cluster of people with less favourable cycling-related factors. This suggests that the psychological determinants of cycling have a higher level of variation compared to the psychological determinants of walking. In other words, respondents’ answers related to cycling are more diverse than answers related to walking, or alternatively, people’s feelings related to cycling are more ‘pronounced’ than those related to walking. Significant differences in respondents’ characteristics are identified between both clusters. Higher shares of respondents from Groningen, Tilburg, Ghent and Düsseldorf are found in the pro-cycling cluster, while this cluster contains a lower fraction of respondents from Bergen, Liège and Trondheim. In addition, the pro-cycling cluster contains more young people (aged 18-34), more men and higher-educated, and more people living with a partner and children. They possess a higher number of all types of vehicles (including PeTs), except cars. The pro-cycling cluster also contains a higher share of respondents with a season ticket for public transportation and to a car or bike sharing system. The pro-cycling cluster contains fewer people who have difficulties to park a bicycle at home. Respondents in the pro-cycling cluster logically cycle significantly more often, but they also show higher rates of walking, riding a moped or motorbike, taking a taxi and using a PeT.