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The role of walking in the development of healthy, livable communities is being increasingly recognized. In urban areas, intersections are often viewed as a deterrent to walking, as their operation primarily favors automobiles, leading to large and unnecessary delays for pedestrians. There is currently very limited research on accommodating and/or prioritizing pedestrians at signalized intersections in the North American context. Pedestrians are often considered as a deterrent to efficient vehicular traffic flow and therefore active efforts to include them in operational decisions at intersections have been lagging. This research aims to fill that gap by understanding factors that influence pedestrian crossing behavior at signalized intersections and developing cost effective and easily deployable signal timing strategies that could be employed at intersections, to increase efficiency for pedestrians.
Dr. Sirisha Kothuri is a research associate in the Department of Civil and Environmental Engineering at Portland State University. Dr. Kothuri’s primary research interests are in the areas of multimodal traffic operations, traffic signal timing and bicycle and pedestrian data...Read more
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GPS use in travel behavior studies has seen increasing acceptance over the past decade, with more than 15 travel surveys conducted since 2000 including a GPS subcomponent. Similarly, accelerometers have become the gold standard for collecting objective physical activity data in health studies. Since 2003, GeoStats has been involved in studies that have deployed both devices in tandem to collect second-by-second travel and physical activity data never before available. This seminar will cover the use of these technologies to address key research questions facing transportation and health professionals.
Dr. Jean Wolf is the president and co-founder of GeoStats, a company specializing in the application of GPS and GIS technologies for the collection, analysis, visualization, and reporting of transportation data. Since the launch of GeoStats in 2000, Dr. Wolf has led all GPS-enhanced travel surveys and physical activity studies conducted by the firm (with more than 20 studies to date). Dr. Wolf has extensive project management, technology, and logistics experience, including 10 years at UPS as an industrial and systems engineer, which makes her uniquely qualified to run complex GPS studies that depend upon the integration of numerous processes and data flows to produce highly detailed and accurate GPS deliverables. Dr. Wolf is a member of the TRB Travel Survey Methods Committee...Read more
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A major aspect of transportation planning is understanding behavior: how to predict it and how to influence it over the long term. Transportation models typically emphasize policy variables such as travel time and cost. While clearly important, we hypothesize that other variables may be just as influential, namely, variables related to environmental consequences such as greenhouse gas emissions. This work is motivated by several factors. First, there is evidence from behavioral economics in non-transport domains that providing personalized information regarding environmental impact can significantly modify behavior. Second, applications to transport appear to have potential as many studies find that environmental consciousness influences transport behavior. Third, there are a growing number of transportation websites that are reporting environmental savings. Finally, smartphones provide the technological means to provide real-time, person-specific travel information regarding trip times, costs, and environmental impacts. Results from a computer laboratory experiment will be presented, which indicate that providing informing regarding environmental impacts significantly increases sustainable behaviors. Further, the experiments suggest a “value of green” of around 44-84 cents per pound of CO2 savings.
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Abstract: Transportation expert Gabe Klein, former Director of the District Department of Transportation (Washington, DC), Co-Founder of On-the-Fly, and former Regional VP of ZipCar, will be speaking about the future of urban transportation and quality of life. 85% of US citizens live in urban metropolitan areas. People are moving back to the urban cores, and what were once suburbs are now looking more like small cities or urban villages themselves. Given the inevitable demographic and geographic population shifts over the next 30 years, what is transportation going to look like in 2020? 2030? How will we manage the change? Gabe will talk about macro and micro policy and market trends, such as access vs. ownership, the commoditization of transportation, landuse, bicycle/pedestrian shifts, and technology affecting consumer choice.
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Abstract: Walking and bicycling are being promoted as transportation options that can increase the livability and sustainability of communities, but the automobile remains the dominant mode of transportation in all United States metropolitan regions. In order to change travel behavior, researchers and practitioners need a greater understanding of the mode choice decision process, especially for walking and bicycling.
This presentation will summarize dissertation research on factors associated with walking and bicycling for routine travel purposes, such as shopping. More than 1,000 retail pharmacy store customers were surveyed in 20 San Francisco Bay Area shopping districts in fall 2009, and 26 follow-up interviews were conducted in spring and summer 2010. Mixed logit models showed that walking was associated with shorter travel distances, higher population densities, more street tree canopy coverage, and greater enjoyment of walking. Bicycling was associated with shorter travel distances, more bicycle facilities, more bicycle parking, and greater enjoyment of bicycling. Respondents were more likely to drive when they perceived a high risk of crime, but automobile use was discouraged by higher employment...Read more