Full-time Academic Staff: Teaching Staff

Dr Calvin P TRIBBY


Room 10.18

391 77460

Assistant Professor

BS, MS UNM; MPH Columbia; PhD OSU




HKU Scholar Hub

Calvin Tribby is a transport and health geographer who examines the interactions between transport, behavior, and environments. He uses health and transport surveys, GPS, GIS, and accelerometers to understand the role of environments and context on transport and health behaviors.

The overall goal of Calvin’s research is to contribute to a broader understanding of behavioral and contextual barriers and facilitators for health promotion. One current research emphasis includes assessing associations of ultraviolet radiation (UV), behaviors, and environments using GPS and GIS. Another research emphasis is examining physical activity and the environment using GPS, GIS, and accelerometers.

Calvin received his PhD in Geography from Ohio State University. He received an MPH from Columbia University and his MS in Geography and BS in Mathematics from the University of New Mexico. He also had postdoctoral training at the National Cancer Institute, National Institutes of Health, USA.

Research Interests
  • Active transport: walking, bicycling, and public transport

  • Health behaviors: sun protection, sunburn, and physical activity

  • Global Positioning Systems (GPS) and accelerometers

  • Geographic Information Science (GISci)


6 credits

Transport Geography

6 credits

Health and Medical Geography

selected Publications


  • Tribby, C.P., A.K. Julian, and F.M. Perna. 2021. Perceived usefulness and recall of sunscreen label information by consumers. JAMA Dermatology Published online March 24, 2021. doi:10.1001/jamadermatol.2020.5394


  • Tribby, C.P., B.I. Graubard, and D. Berrigan. 2020. National and metropolitan trends in public transit use, transit-related walking, and ridesharing between 2009 and 2017. Journal of Transport & Health 19:100918.

  • Tribby, C.P., A.K. Julian, A.Y. Oh, F.M. Perna, and D. Berrigan. 2020. Associations between ultraviolet radiation, tree cover and adolescent sunburns. International Journal of Health Geographics 19:59.

  • Tribby, C.P., A.Y. Oh, F.M. Perna, and D. Berrigan. 2020. Adolescent physical activity at public, private, and homeschools. Preventing Chronic Disease 18:190450.

  • Tribby, C.P., D. Berrigan, and F.M. Perna. 2020. Association between walking and sunburn: a potential trade-off between cancer prevention and risk factors. Annals of Behavioral Medicine 54(2):125-131.


  • Carr, J.K., S.A. Fontanella, and C.P. Tribby. 2019. Identifying American Beer Geographies: A Multiscale Core-Cluster Analysis of US Breweries. The Professional Geographer 71(2):185-196.

  • Tribby, C.P., F.M. Perna, and D. Berrigan. 2019. Walking and sun protective behaviors: cross-sectional associations of beneficial health factors. International Journal of Environmental Research and Public Health 16(13):2361.

  • Tribby, C.P. and D.S. Tharp. 2019. Examining urban and rural bicycling in the United States: Early findings from the 2017 National Household Travel Survey. Journal of Transport & Health 13:143-149.the 2017 National Household Travel Survey. Journal of Transport & Health 13:143-149.


  • Werner, C.M., B.B. Brown, T. Stump, C.P. Tribby, W. Jensen, H.J. Miller, A. Strebel, and A. Messina. 2018. Street use and design: Daily rhythms on four streets that differ in rated walkability. Journal of Urban Design 23(4):603-619.


  • Tribby, C.P., H.J. Miller, B.B. Brown, C.M. Werner, and K.R. Smith. 2017. Geographic regions for assessing built environmental correlates with walking trips: a comparison using different metrics and model designs. Health & Place 45:1-9.

  • Tribby, C.P., H.J. Miller, B.B. Brown, C.M. Werner, and K.R. Smith. 2017. Analyzing built environment associations with walking route choice through machine learning and discrete choice techniques. Environment and Planning B: Urban Analytics and City Science 44(6):1145-1167.


  • Tribby, C.P., H.J. Miller, B.B. Brown, C.M. Werner, and K.R. Smith. 2016. Assessing built environment walkability using activity space summary measures. Journal of Transport and Land Use 9(1):187-207.

  • Brown, B.B., C.M. Werner, K.R. Smith, C.P. Tribby, H.J. Miller, D. Tharp, and W. Jensen. 2016. Environmental, behavioral, and psychological predictors of transit ridership: evidence from a community intervention. Journal of Environmental Psychology 46:188-196.

  • Brown, B.B., D. Tharp, C.P. Tribby, K.R. Smith, H.J. Miller, and C.M. Werner. 2016. Changes in bicycling over time associated with a new bike lane: relations with kilocalories energy expenditure and body mass index. Journal of Transport & Health 3:357-365.

  • Werner, C.M., B.B. Brown, C.P. Tribby, D. Tharp, K. Flick, H.J. Miller, K.R. Smith, and W. Jensen. 2016. Evaluating the attractiveness of a new light rail extension: testing simple change and displacement change hypotheses. Transport Policy 45:15-23.


  • Miller, H.J., C.P. Tribby, B.B. Brown, K.R. Smith, C.M. Werner, J. Wolf, L. Wilson and M.G. Simas Oliveira. 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 36:8-17.

  • Brown, B.B., C.M. Werner, C.P. Tribby, H.J. Miller, and K.R. Smith. 2015. Transit use, physical activity, and body mass index changes: objective measures associated with Complete Street light rail construction. American Journal of Public Health 105(7):1468-1474.


  • Tribby, C.P., H.J. Miller, Y. Song, and K.R. Smith. 2013. Do air quality alerts reduce traffic? An analysis of traffic data from the Salt Lake City metropolitan area, Utah, USA. Transport Policy 30:175-183.

  • Miller, H.J., F. Witlox, and C.P. Tribby. 2013. Developing context-sensitive livability indicators for transportation planning: a measurement framework. Journal of Transport Geography 26:51-64.


  • Tribby, C.P. and P.A. Zandbergen. 2012. High-resolution spatio-temporal modeling of public transit accessibility. Applied Geography 43:345-355.

Last Update: AUG 2020

Selected Awards


Third Place. “National and metropolitan trends in transit use, transit-related walking, and ridesharing 2009 and 2017.” Geography, GIScience & Health: Spatial Aspects of Cancer, NCDs & Health Behavior Poster Competition, American Association of Geographers (AAG)


Jacques May Dissertation Prize. Health and Medical Geography Specialty Group, AAG


Outstanding Dissertation Award. Transportation Geography Specialty Group, AAG


E. Willard and Ruby S. Miller Fellowship. Geography Department, Ohio State University



National Cancer Institute, National Institutes of Health (USA). Trans-Fellowship Research Award.


National Cancer Institute. Collaborative Research Award for Fellows in Training.


National Institute for Transportation and Communities (USA). Dissertation Fellowship.


Point B Transportation Group, University of Utah (USA). Research Award.