The Geographical Sciences Committee of the National Academies of Science, Engineering and Medicine has posted a recording of my 1 March 2017 webinar on “Using GIS to Make Urban Mobility More Sustainable.” Thanks to the GSC for sponsoring and hosting this event!
Tribby C.P., Miller H.J., Brown B.B., Smith K.R. and Werner C.M. “Geographic regions for assessing built environmental correlates with walking trips: A comparison using different metrics and model designs, Health and Place, 45, 1-9.
- We assess walking with audit and perceived built environment measures.
- Spatial measures are walking activity spaces and self-defined neighborhoods.
- Findings indicate that environmental measures have preferred spatial extents.
- Researchers need to consider varying spatial measures to assess walking correlates
There is growing international evidence that supportive built environments encourage active travel such as walking. An unsettled question is the role of geographic regions for analyzing the relationship between the built environment and active travel. This paper examines the geographic region question by assessing walking trip models that use two different regions: walking activity spaces and self-defined neighborhoods. We also use two types of built environment metrics, perceived and audit data, and two types of study design, cross-sectional and longitudinal, to assess these regions. We find that the built environment associations with walking are dependent on the type of metric and the type of model. Audit measures summarized within walking activity spaces better explain walking trips compared to audit measures within self-defined neighborhoods. Perceived measures summarized within self-defined neighborhoods have mixed results. Finally, results differ based on study design. This suggests that results may not be comparable among different regions, metrics and designs; researchers need to consider carefully these choices when assessing active travel correlates.
Miller HJ, Tribby CP, Brown BB, Smith KR, Werner CM, Wolf J, Wilson L, Oliveira MGS (2015) “Public transit generates new physical activity: Evidence from individual GPS and accelerometer data before and after light rail construction in a neighborhood of Salt Lake City, Utah, USA,” Health & Place, 26, 8-17. doi:10.1016/j.healthplace.2015.08.005
- We track physical activity time before and after construction of a light rail line
- Study participants wore accelerometers and GPS recorders
- Changes in physical activity time relate directly to changes in transit use
- No substitution of transit-related physical activity time for other activity time