Modeling spatial segregation and travel cost influences on utilitarian walking: Towards policy intervention.
We develop an agent-based model of utilitarian walking and use the model to explore spatial and socioeconomic factors affecting adult utilitarian walking and how travel costs as well as various educational interventions aimed at changing attitudes can alter the prevalence of walking and income differentials in walking. The model is validated against US national data. We contrast realistic and extreme parameter values in our model and test effects of changing these parameters across various segregation and pricing scenarios while allowing for interactions between travel choice and place and for behavioral feedbacks. Results suggest that in addition to income differences in the perceived cost of time, the concentration of mixed land use (differential density of residences and businesses) are important determinants of income differences in walking (high income walk less), whereas safety from crime and income segregation on their own do not have large influences on income differences in walking. We also show the difficulty in altering walking behaviors for higher income groups who are insensitive to price and how adding to the cost of driving could increase the income differential in walking particularly in the context of segregation by income and land use. We show that strategies to decrease positive attitudes towards driving can interact synergistically with shifting cost structures to favor walking in increasing the percent of walking trips. Agent-based models, with their ability to capture dynamic processes and incorporate empirical data, are powerful tools to explore the influence on health behavior from multiple factors and test policy interventions.
School of Public Health, University of Memphis, Memphis, TN, USA.
Yong
Y
Yang
Department of Epidemiology and Biostatistics, Drexel University, Philadelphia, Pa, USA.
Amy H
AH
Auchincloss
Department of City and Regional Planning, University of North Carolina, Chapel Hill, NC, USA.
Daniel A
DA
Rodriguez
School of Natural Resources & Environment, University of Michigan, Ann Arbor, MI, USA.
Daniel G
DG
Brown
Center for the Study of Complex Systems, University of Michigan, Ann Arbor, MI, USA.
Rick
R
Riolo
School of Public Health, Drexel University, Philadelphia, PA, USA.
Ana V
AV
Diez-Roux
Agent-based model; Behavior feedback; Socioeconomic disparities; Spatial segregation; Travel costs; Utilitarian walking