One key way to reduce transport CO₂ emissions is to effect behavioural change in mobility patterns: how, how often, where and when people travel. Examples include switching from cars to (electric) bikes and/or public transport and less travel by working from home and use of video-links for meetings. Behavioural measures can also contribute to other policy targets, such as improved health through more exercise, reduced air pollution and noise nuisance, and reduced land-use needs and congestion, thus improving overall quality of life. At the request of the Dutch ministry of Infrastructure and Water Management CE Delft has carried out a study to provide insight into how behavioural change in passenger transport can help achieve CO2 emissions reduction and how, in doing so, one can build on the behavioural measures developed over the past few years under the Beter Benutten (‘Optimising Use’) programme, aimed specifically at reducing congestion. The report’s conclusions are summarized in an infographic.