Friday, November 9, 2012
Room 204 of the Distance Learning Center Wing of the Urban Center on the Portland State University campus. 12pm-1pm.
Speaker: Cynthia Chen, University of Washington
Topic: Evaluating the Feasibility of Passive Travel Survey collection in a Complex Urban Environment: Lessons Learned from the New York City Case Study
Abstract: The combination of increasing challenges in administering household travel surveys as well as advances in global positioning systems (GPS) and geographic information systems (GIS) technologies motivated this project. It tests the feasibility of using a passive travel data collection methodology in a complex urban environment, by developing GIS algorithms to automatically detect travel modes and trip purposes. The study was conducted in New York City where the multi-dimensional challenges include urban canyon effects, an extremely dense and diverse set of land use patterns, and a complex transit network. Our study uses a multi-modal transportation network, a set of rules to achieve both complexity and flexibility for travel mode detection, and develops procedures and models for trip end clustering and trip purpose prediction. The study results are promising, reporting success rates ranging from 60% to 95%, suggesting that in the future, conventional self-reported travel surveys may be supplemented, or even replaced, by passive data collection methods.
Speaker Bio: Cynthia Chen is an associate professor in the department of civil and environmental engineering at the University of Washington. She obtained her Ph.D in civil and environmental engineering from the University of California at Davis in 2001. Prior to arriving in the University of Washington, she taught in the City College of New York for six years. She has published in a number of transportation and urban planning journals, including Transportation Research Part A, Part B, Transportation, Environment and Planning A, Urban Studies, and Transport Geography. Her current research interest is to understand human movements in time and space. She focuses on characterizing key characteristics of these movements, identifying regular and irregular patterns, and charting out the lifecycle of these patterns over time.