Tim Welch specializes transportation, infrastructure and urban modelling with a focus on the use of big data and technology. Much of Dr. Welch’s research is applied with a focus on equity and climate change. His past work has included analyses of public transportation performance and connectivity; evaluating the efficacy of policies aimed at mitigating climate change; developing models to measure housing value and other fiscal impacts of transportation infrastructure investments; and investigating the travel behavior influences of the built environment.
Research | Current
- Transportation service connectivity and equity
- Methods to incorporate big data into transportation analysis
- Infrastructure investments and housing values
- Planning for non-motorized and emerging transport modes
Teaching | Current
Urban Planning 205: Transportation Planning
Critical analysis of land transport transportation planning, the land transport system and management, and the interrelationship between land use activities in the urban environment.
Urban Planning 705: Sustainable Infrastructure Planning
Analysis of current issues in infrastructure planning, drawing from case studies around the world. The issues will be investigated in the context of sustainable provision and management in New Zealand, focusing on the primary city – Auckland.
- Member of the Royal Society of New Zealand (2020)
- Transportation Research Board (2013)
Selected publications and creative works (Research Outputs)
- Welch, T. F., Gehrke, S. R., & Widita, A. (2020). Shared-use mobility competition: a trip-level analysis of taxi, bikeshare, and transit mode choice in Washington, DC. Transportmetrica A: Transport Science, 16 (1), 43-55. 10.1080/23249935.2018.1523250
- Welch, T. F., & Widita, A. (2019). Big data in public transportation: a review of sources and methods. TRANSPORT REVIEWS, 39 (6), 795-818. 10.1080/01441647.2019.1616849
- Gehrke, S. R., & Welch, T. F. (2019). A bikeshare station area typology to forecast the station-level ridership of system expansion. Journal of Transport and Land Use, 12 (1), 221-235. 10.5198/jtlu.2019.1395
- Welch, T. F., Gehrke, S. R., & Farber, S. (2018). Rail station access and housing market resilience: Case studies of Atlanta, Baltimore and Portland. Urban Studies, 004209801876070-004209801876070. 10.1177/0042098018760708
- Welch, T. F., Gehrke, S. R., & Wang, F. (2016). Long-term impact of network access to bike facilities and public transit stations on housing sales prices in Portland, Oregon. Journal of Transport Geography, 54, 264-272. 10.1016/j.jtrangeo.2016.06.016
- Welch, T. F., & Mishra, S. (2013). A measure of equity for public transit connectivity. Journal of Transport Geography, 33, 29-41. 10.1016/j.jtrangeo.2013.09.007
- Welch, T. F. (2013). Equity in transport: The distribution of transit access and connectivity among affordable housing units. Transport Policy, 30, 283-293. 10.1016/j.tranpol.2013.09.020
- Mishra, S., Welch, T. F., & Jha, M. K. (2012). Performance indicators for public transit connectivity in multi-modal transportation networks. Transportation Research Part A: Policy and Practice, 46 (7), 1066-1085. 10.1016/j.tra.2012.04.006