Evidence base review on mobility : choices and barriers for different social groups SmithNoel BeckhellingJacqueline IvaldiAntonia KellardKaren SanduAdriana TarrantCarolyn 2007 The Department for Transport (DfT) aims to provide transport which works for everyone. In order to achieve this aim, it is crucial to have a comprehensive picture of the mobility of different social groups and of how transport provision and policy impacts upon their choices. Individual pieces of social research have previously analysed and reported these differences, but there is a need to review and draw together this evidence.