Despite evidence that a more compact urban form, access to transit and a greater mix of uses generates fewer and shorter vehicle trips, local governments are often compelled to use current ITE trip generation rates to evaluate transportation impacts and calculate transportation system development charges (TSDCs). This ongoing line of research proposes to develop multi-modal trip generation rates and methods that better reflect the relationship between land use, transportation and travel demand for specific land use types located in various urban settings. The research theme aims to: a) improve the methods to collect and disseminate local data (using multi-modal counts and establishment surveys), b) develop methodologies to estimate multimodal (or person) trip generation rates that are sensitive to demographic, land use and transportation contexts, and c) understand the links between various policy levers and travel behavior.
To this end, we have engaged in a variety of projects to advance this research agenda. Links can be found below:
- Trip Generation for Affordable Housing (Caltrans)
- Data Collection Program to Support Transportation System Development Charges (Portland Bureau of Transportation)
- Multimodal Trip Generation, Vehicle Ownership and Use: Characterizing The Travel Patterns of Residents of Multifamily Housing (NITC)
- Data and Methodological Issues in Assessing Transportation Impacts of Urban Development (dissertation by Kristina Currans)
- Understanding Market Segments for Current and Future Residential Location and Travel Choices (Oregon Department of Transportation/OTREC)
- Person-trip Methodology for Transportation System Development Charges (Portland Bureau of Transportation)
- Developing Framework for Incorporating Mitigation Effectiveness into the TPR Process (ODOT)
- Contextual Influences on Trip Generation (NITC)
- Improving Trip Generation Methods for Livable Communities (NITC)
- Study of Workforce Housing, Transportation & Employment Decisions: Implications for Siting Future Federal Facilities (US General Services Administration)
Currans, K.M. & Clifton K.J. ” Using household travel surveys to adjust ITE trip generation
rates,” Journal of Transport & Land Use, 2015, 8(1): 85-119.
Clifton, Kelly J.; Currans, Kristina M. & Muhs, Christopher D. “Adjusting ITE’s Trip Generation Handbook for Urban Context,” Journal of Transport & Land Use, 8(1), 2015, pp 1-25. http://dx.doi.org/10.5198/jtlu.2015.378
Clifton, Kelly J.; Currans, Kristina Marie and Muhs, Christopher D. “Evolution of ITE Trip
Generation Handbook: Proposal for Collecting Multimodal, Multi-context Establishment Level
Data,” Transportation Research Record: Journal of the Transportation Research Board, No.
2344, 2013, pp. 107–117. http://dx.doi.org/10.3141/2344-12
Clifton, Kelly J.; Currans, Kristina M; Cutter, April C. and Schneider, Robert. “A Context Based
Approach for Adjusting Institute of Transportation Engineers Trip Generation Rates in
Urban Contexts Using Household Travel Surveys,” Transportation Research Record: Journal of
the Transportation Research Board, No. 2307, 2013. pp. 108-119. http://dx.doi.org/10.3141/2307-12
Chen, Roger B.; Gehrke, Steven R.; Currans, Kristina Marie; Clifton, Kelly J.; Liu, Jenny & Jang, Yunemi. “Exploring Residential Tenure and Housing Type Decisions and Household Activity Engagement,” Transportation Research Record: Journal of the Transportation Research Board, No. 2344, Transportation Research Board of the National Academies, Washington, D.C., 2013, pp. 68–78. http://dx.doi.org/10.3141/2344-08
Targa, Felipe; Clifton, Kelly J. & Mahmassani, Hani S. “Influence of Transportation Access on Individual Firm Location Decisions,” Transportation Research Record: Journal of the Transportation Research Board, No. 1977, Transportation Research Board of the National Academies, Washington, D.C., 2006. pp. 179-189. http://dx.doi.org/10.3141/1977-23
Targa, Felipe & Clifton, Kelly J. “The Built Environment and Trip Generation for Non-Motorized Travel: Evidence from Baltimore City Using the National Household Travel Survey,” Journal of Transportation & Statistics, vol. 8(3), 2005. pp. 55-70.
Targa, F; Clifton, KJ & Mahmassani, HS. “Economic Activity and Transportation Access: An Econometric Analysis of Business Spatial Patterns,” Transportation Research Record: Journal of the Transportation Research Board, No. 1932, Transportation Research Board of the National Academies, Washington, D.C., 2005. pp. 61-71. http://dx.doi.org/10.3141/1932-08