Using natural resources and taxes to develop infrastructure for private car use takes funding away from other projects such as the development of social infrastructure, neighbourhood parks and alternatives to fossil fuels. The 'E's are an easily communicable theoretical framework which can guide the governments approach to “catalyse” change in attitudes and behaviours of people and communities. Behavioural change takes time, governments must be aware of this, and dedicate sufficient resources and sustained effort while following the four E's to Enable, Encourage, Engage and Exemplify.