Greg Rybarczyk

Dr. Greg Rybarczyk

University of Michigan - Flint
+2
orcid

Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 April 2010 in Applied Geography
Verified
Journal Article
Closed access
GRGreg Rybarczyk
Greg Rybarczyk
Changshan WuChangshan Wu
Changshan Wu

1 July 2014 in Journal of Transport Geography
Verified
Journal Article
Closed access
GRGreg Rybarczyk
Greg Rybarczyk
LGLaura Gallagher
Laura Gallagher

AOAyseOzbilTorun Ozbil
AyseOzbilTorun Ozbil
Demet YesiltepeDemet Yesiltepe
Demet Yesiltepe
GAGorsev Argin
Gorsev Argin
GRGreg Rybarczyk
Greg Rybarczyk
Increasing active school travel (AST) among children may provide the required level of daily physical activity and reduce the prevalence of obesity. Despite efforts to promote this mode, recent evidence shows that AST rates continue to decrease in suburban and urban areas alike. The aim of this research study, therefore, is to facilitate our understanding of how objective and perceived factors near the home influence children’s AST in an understudied city, İstanbul, Turkey. Using data from a cross-sectional sample of students aged 12–14 from 20 elementary schools (n = 1802) and consenting parents (n = 843), we applied a nominal logistic regression model to highlight important predictors of AST. The findings showed that street network connectivity (as measured by two novel space syntax measures, metric reach and directional reach) was the main deciding factor for active commuting to school, while parents’ perceptions of condition of sidewalks and shade-casting street trees were moderately significant factors associated with AST. Overall, this study demonstrated the significance of spatial structure of street network around the homes in the potential for encouraging AST, and more importantly, the need to consider objective and perceived environmental attributes when strategizing means to increase this mode choice and reduce ill-health among children.

1 April 2014 in Environment and Planning B: Planning and Design
Verified
Journal Article
Closed access
GRGreg Rybarczyk
Greg Rybarczyk
Changshan WuChangshan Wu
Changshan Wu
Nonmotorized transport modes such as bicycling are becoming important components to urban transportation systems in the United States, in particular with the recent emphases on sustainable urban development. Recent bicycle forecasting methods have included urban design elements to help explain bicycle behavior but most measures lack accountability of microscale built form attributes that address bicyclist perception. This study developed a discrete choice model to examine the impact of urban morphological factors on people's utilitarian bicycle mode choice decisions. In the model, traditional factors considered include personal, household, and environmental variables. Urban morphology variables from space syntax were also incorporated in the model to test for the marginal influence of microscale design and space characteristics in the decision to bicycle. Results indicate that microscale built form factors that enhance visibility and contain well connected street networks significantly affected bicycle mode choice decisions at the trip origin. The finding that built form variables by and large influence the probability that someone will commute via bicycle suggests that policies and planning efforts aimed at increasing bicycle mode share should include human-scaled built form metrics that address urban space and cognition.

26 June 2018 in The Journal of Wildlife Management
Verified
Journal Article
Closed access
PDF file
MSMelissa D. Starking‐Szymanski
Melissa D. Starking‐Szymanski
TYTeresa Yoder‐Nowak
Teresa Yoder‐Nowak
GRGreg Rybarczyk
Greg Rybarczyk
HDHeather A. Dawson
Heather A. Dawson

GRGreg Rybarczyk
Greg Rybarczyk
DTDorceta E. Taylor
Dorceta E. Taylor
SBShannon Brines
Shannon Brines
RWRichard Wetzel
Richard Wetzel
To date, the research that examines food accessibility has tended to ignore ethnic food outlets. This void leaves us with a limited understanding of how such food stores may, or may not, impact food security. The study discussed herein addressed this by conducting a geospatial assessment of ethnic food outlet accessibility in two U.S. cities: Flint and Grand Rapids, Michigan. We used Geographic Information Systems (GIS) tools to create a revealed accessibility index for each food outlet, and used the index to determine access within active travel service areas. We utilized an ordinary least squares regression (OLS), and two local models: spatial autoregression (SAR) and geographically weighted regression (GWR) to enhance our understanding of global and localized relationships between outlet accessibility and type (while controlling for known covariates). The results show that the local models outperformed (R2 max = 0.938) the OLS model. The study found that there was reduced access to ethnic restaurants in all service areas of Grand Rapids. However, in Flint, we observed this association in the bicycling areas only. Also notable were the influences that demographic characteristics had on access in each city. Ultimately, the findings tell us that nuanced planning and policy approaches are needed in order to promote greater access to ethnic food outlets and reduce overall food insecurity.