High Quality Content by WIKIPEDIA articles! Traffic psychology is a relatively young field of psychology. Often subdivided between two areas of study, traffic psychology is primarily related to the study of the behavior of road users and the psychological processes underlying that behavior (Rothengatter, 1997, 223) as well as to the relationship between behavior and accidents, transportation psychology, sometimes referred to as mobility psychology, focuses on mobility issues, individual and social factors in the movement of people and goods, and travel demand management (TDM).