Climate change is today's big threat to which the transport sector's continued increasing emissions of greenhouse gases must be considered co-responsible. This project wants to promote environmentally and climate-friendly transport and investigates which traffic policy instruments can most effectively affect transport behavior towards increased use of public transport. The starting point is a literature study of possible political tools as well as experiences with this. Subsequently it analyzes how the environmental and climate challenges have been handled since this was added to the traffic policy agenda in 1990. The issue is further investigated through a questionnaire survey focusing on a Stated Preference study among 796 respondents residing in the Capital Region of Denmark.

The Stated Preference game showed that it is extremely difficult to influence transport behavior, where changes in the form of fare reductions, reduced travel time and taxation had a limited impact on the respondents. However, the results showed that the improving of public transport had a slightly greater impact when combined with instruments such as a toll ring or road pricing, which is directly targeted to motorists’ driving.