Steve has extensive experience in evaluation of the built environment and travel behavior, including how socio-psychological factors (attitudes, perceptions, and habits) affect transportation choices and how these factors interact with urban design to influence travel and physical activity.

His research has examined travel behavior change, naturalistic cycling behavior, and the modeling of pedestrian and bicycle traffic volumes. This includes studies of route choice and safety behaviors among children and adolescents, the effect of bicycle daytime running lights on driver passing behavior, and cyclist behavior and traffic stress. He has also conducted research on how new public transportation service affects car use and active travel.

He additionally has more than a decade of experience in aviation, including airport engineering and planning, airborne atmospheric research, and project management.