Pollution caused by traffic is one of today's fastest growing environmental problems in urban areas, but the pollution could be reduced if people's modal choice had been more environmentally responsible. From an environmental psychology perspective, this study analyses the importance of attitudes and environmental knowledge to driving distance, travel behaviour and acceptance of various traffic restrictions. The analysis was based on a questionnaire answered by 422 (51% response rate) citizen of Lurid in the South of Sweden. Five different attitude dimensions were defined in a factor analysis. Three dimensions interpreted as environmental concern, hazard/efficacy perception and car dependency were connected with driving distance, travel behaviour and acceptance, whereas two dimensions public transport attitude and environment and health interest were not. Neither was environmental knowledge. Politicians and civil servants are in decision-making positions, with tools as well as responsibility for actual implementations of traffic restrictions. 122 (51% response rate) local politicians and civil servants in the municipality of Lurid were asked to complete a similar questionnaire as the public previously had answered. Also in this group of local decision-makers, acceptance of traffic restrictions was related to environmental concern, perceived hazard and car dependency. Naturally the decision-makers had a wider knowledge of the environmental impact of traffic. They held the same level of acceptance as the public, but preferred restrictions of a more financial nature. This enhance the importance of a well functioning communication between local decision-makers and the public, as to what restrictions should be implemented. A similar psychological process seems to direct the acceptance of traffic restrictions for both the general public and local decision_makers. Personal attitudes stand out as important, foremost towards the environment and the car. These results suggest that it may be important to focus attitudes when promoting an environmental travel behaviour rather than solely relying on factual information. Environmental attitudes begin to develop in pre-school age and it may be advantageous to attend to environmentally responsible attitudes and travel behaviour among children.