Travel behaviour research has a pivotal role to play in informing the worldwide debate over the degree to which the growth in personal travel, notably by private motor vehicles, should be encouraged or controlled. At stake are complex public interests concerning air quality, energy, lifestyle, economic development and the built environment. This international collection of papers on current methodological and substantive findings from the analysis of personal travel is written by travel behaviour researchers from the social and engineering sciences. It is organised into four sections: traveller activity and perception; state preference methods; dynamic behaviour; and improvement of behavioural travel models.