Table 1 Overview of hypotheses tested within this study

Openness to use a combined mobility service for commuting, short weekday leisure trips and weekend leisure trips is significantly higher for the following groups:

H1: Middle-aged (ages 35–54) participants as compared to younger (ages 18–34) and older (55 and above) participants

H2: More educated participants

H3: Infrequent car users as compared to very frequent car users

H4: Participants that use carsharing (including peer-to-peer carsharing) at least a few times a month compared to those that never use carsharing

H5: Participants with pro-environmental attitudes

H6: Participants with the intention to reduce car usage

H7: Participants who were shown a hypothetical top rating (for example, five out of five stars) for a combined mobility service compared to showing them a lower rating (four stars out of five)

H8: Participants who receive an announcement of future decided policies directly affecting them