Data & Information

We are developing and testing new (and old) approaches to collecting information about people and the goods, activities, transportation choices, and their social, environmental, and economic context. We embrace mix-method approaches (and theoretical perspectives) to understand the complexity of human interaction in the city.


Benchmarking Vehicle Miles Traveled – PI Clifton (Portland Bureau of Transportation, 2019-2020) – This project will develop a methodology to provide consistent measures of how Portland is progressing towards its climate and transportation performance goals.

NSF Sustainable Urban Systems “New Mobility, Cities and Data” Workshop Report – On July 15-16 2019, a diverse group of university researchers and community stakeholders from Columbus, Ohio and Portland, Oregon participated in a workshop to explore issues surrounding new mobility technologies, sustainable urban systems and data.

Developing Data, Models, and Tools to Enhance Transportation Equity – PI Amy Lubitow (National Instititute for Transportation and Communities)

Wider Dissemination of Household Travel Survey Data Using Geographical Perturbation Methods (Oregon Transportation Research and Education Consortium)


Lefebvre-Ropars, G.; Morency, C.; Singleton, P.; and Clifton, K. “Assessing the spatial transferability of a walkability index: the Pedestrian Index of the Environment”, Transportation Research Part D: Transport and Environment, 2017 (57): 378-392.

Blanc, B.; Figliozzi, MA; and Clifton, KJ. “How Representative of Bicycling Populations Are Smartphone Application Surveys of Travel Behavior?” Transportation Research Record: Journal of the Transportation Research Board, No. 2587, 2016, pp. 78–89.

Clifton, Kelly J. & Perez, Pascal “Workshop synthesis: Built environment and contextual variables,” Proceedings from International Conference on Transport Survey Methods, Transportation Research Procedia, Vol 11C, 2015 pp. 452-459.

Currans, K; Gehrke, S & Clifton K. “Visualizing The Housing, Accessibility, and Transportation Characteristics of a Neighborhood in A Stated Preference Survey: A Pilot Study,” Proceedings of the 94th Annual Meeting of the Transportation Research Board, Washington, DC, January 11-15, 2015.

Singleton, P. A., Schneider, R. J., Muhs, C. D., & Clifton, K. J. (2014). “The Pedestrian Index of the Environment (PIE): Representing the Walking Environment in Planning Applications,” Proceedings of the 93rd Annual Meeting of the Transportation Research Board, 2014.

Clifton, Kelly J. and Gehrke, Steven R. “Application of Geographic Perturbation Methods to Residential Locations in the Oregon Household Activity Survey: Proof of Concept,” Transportation Research Record: Journal of the Transportation Research Board, No. 2354, 2013, pp. 40–50.

Clifton, Kelly J. “Collecting Qualitative & Quantitative Data on the Social Context of Travel Behaviour”, in Transport Survey Methods: Best Practice for Decision Making (ed. Zmud, Lee-Gosselin, Munizaga, & Carrasco, JA), Bingley, UK: Emerald Press, 2013. pp.441-448.

Clifton, Kelly J.; Currans, Kristina Marie and Muhs, Christopher D. “Evolution of ITE TripGeneration Handbook: Proposal for Collecting Multimodal, Multi-context Establishment LevelData,” Transportation Research Record: Journal of the Transportation Research Board, No.2344, 2013, pp. 107–117.

Clifton, Kelly J. and Muhs, Christopher. “Capturing and Representing Multimodal Trips inTravel Surveys: A Review of the Practice,” Transportation Research Record: Journal of theTransportation Research Board, No. 2285, 2012. pp. 74-83.

Clifton, Kelly J. and Gregor, Brian J. “The Development of a Decision Tool for Greenhouse Gas Emissions Reduction Strategies: The Role of NHTS Data in GreenSTEP ModelDevelopment,” Transportation Research Record: Journal of the Transportation Research Board, No.2291, 2012, pp. 124-134.

Clifton, Kelly J. Chapter 10: “Physical Activity in the Built Environment: Synthesis of a Workshop,” In Transport Survey Methods: Keeping Up with a Changing World. (ed. Bonnel, Lee-Gosselin, Zmud & Madre), Bingley, UK: Emerald Press, 2009. pp. 191-196.

Clifton, Kelly; Ewing, Reid; Knaap, Gerrit-Jan, and Song, Yan. “Quantitative analysis of urban form: A multi-disciplinary review,” Journal of Urbanism, vol. 1(1), 2008. pp. 17–48.

Clifton, Kelly J., Livi Smith, Andrea D., and Rodriguez, Daniel. “The development and testing of an audit for the pedestrian environment,” Journal of Landscape and Urban Planning, 80(1-2), 2007. pp. 95-110.

Clifton, Kelly J. & Susan Handy L. Chapter 16: “Qualitative Methods in Travel Behaviour Research,” in Transport Survey Quality & Innovation, P. Stopher & P. Jones (eds.), Oxford UK: Elsevier Science, Pergamon, 2003. pp. 283-302.