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2012

Portland State University

Transportation

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Articles 1 - 18 of 18

Full-Text Articles in Social and Behavioral Sciences

Designbridge: Integrating Transportation Into Service Learning Design/Build Projects, Juli Brode, Nico Larco, John Roswell Dec 2012

Designbridge: Integrating Transportation Into Service Learning Design/Build Projects, Juli Brode, Nico Larco, John Roswell

TREC Final Reports

This proposal develops transportation-related projects through the work of designBridge. This active, student-based organization is composed of members from the University of Oregon’s School of Architecture and Allied Arts working cooperatively with participants from the UO’s Planning, Public Policy and Management, Landscape Architecture, Geography, and Art departments. The program provides an opportunity for students to gain valuable, real-world experience by encouraging them to explore significant design issues in the community, to seek appropriate solutions to transportation problems, and to develop professional skills. Students are engaged in all phases of the design and building process, from the first client ...


Analysis Of Travel Time Reliability For Freight Corridors Connecting The Pacific Northwest, Miguel A. Figliozzi Nov 2012

Analysis Of Travel Time Reliability For Freight Corridors Connecting The Pacific Northwest, Miguel A. Figliozzi

Civil and Environmental Engineering Faculty Publications and Presentations

A new methodology and algorithms were developed to combine diverse data sources and to estimate the impacts of recurrent and non-recurrent congestion on freight movements’ reliability and delays, costs, and emissions. The results suggest that traditional traffic sensor data tend to underestimate the impacts of congestion on commercial vehicles travel times and variability. This research also shows that congestion is not only detrimental for carriers and shippers costs but also for the planet due to major increases in GHG emissions and for the local community due to large increases in NOx, PM, and other harmful pollutants.

The methodologies developed throughout ...


Contextual Influences On Trip Generation, Kelly J. Clifton, Kristina Marie Currans, Christopher D. Muhs Nov 2012

Contextual Influences On Trip Generation, Kelly J. Clifton, Kristina Marie Currans, Christopher D. Muhs

Civil and Environmental Engineering Faculty Publications and Presentations

There is national interest in building data that expands upon the existing Institute of Transportation Engineers (ITE) trip generation rates to include sites located in a multi-modal context. Current ITE rates represent travel behavior for development in single lots and uses, primarily measured in low-density suburban areas. 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 is due to: a) the expense ...


Measuring The Longitudinal Effects Of Food Carbon Footprint Training On Consumers: Knowledge, Attitudes, And Behavioral Intentions, Robin Wikoff, Gretchen N. Rainbolt, Wayne Wakeland Oct 2012

Measuring The Longitudinal Effects Of Food Carbon Footprint Training On Consumers: Knowledge, Attitudes, And Behavioral Intentions, Robin Wikoff, Gretchen N. Rainbolt, Wayne Wakeland

Systems Science Faculty Publications and Presentations

Although the supply chains through which foods are produced, processed, and transported can have a significant impact on carbon dioxide (CO2) emissions, consumers are largely unaware of how their food choices may impact the environment. Based on a previous related study, we hypothesized that a web-based training process could increase consumer knowledge and perhaps influence consumer behavior longitudinally. To test this, food distribution networks were modeled and analyzed to determine CO2 footprints for a variety of foods, and a training process was designed to teach consumers about the CO2 emissions for different types of foods that are ...


Value Of Travel Time Reliability Part Ii: A Study Of Tradeoffs Between Travel Reliability, Congestion Mitigation Strategies And Emissions, Miguel A. Figliozzi, Alexander Y. Bigazzi Sep 2012

Value Of Travel Time Reliability Part Ii: A Study Of Tradeoffs Between Travel Reliability, Congestion Mitigation Strategies And Emissions, Miguel A. Figliozzi, Alexander Y. Bigazzi

Civil and Environmental Engineering Faculty Publications and Presentations

Capacity, demand, and vehicle based emissions reduction strategies are compared for several pollutants employing aggregate US congestion and vehicle fleet condition data. We find that congestion mitigation does not inevitably lead to reduced emissions; the net effect of mitigation depends on the balance of induced travel demand and increased vehicle efficiency that in turn depend on the pollutant, congestion level, and fleet composition. In the long run, capacity-based congestion improvements within certain speed intervals can reasonably be expected to increase emissions of CO2e, CO, and NOx through increased vehicle travel volume. Better opportunities for emissions reductions exist for HC and ...


Operational Guidance For Bicycle-Specific Traffic Signals In The United States, Christopher Monsere, Miguel A. Figliozzi, Sam Thompson, Kirk Paulsen Aug 2012

Operational Guidance For Bicycle-Specific Traffic Signals In The United States, Christopher Monsere, Miguel A. Figliozzi, Sam Thompson, Kirk Paulsen

Civil and Environmental Engineering Faculty Publications and Presentations

The research consisted of two phases: 1) a synthesis of practice and 2) and analysis of cyclist performance characteristics. The synthesis of current practice reviewed the literature, current engineering design and operational guidance documents, and surveyed the jurisdictions about their current deployments of bicyclespecific signals. This report summarizes research of cyclist behavior at signalized intersections in Portland, Eugene, Corvallis, Beaverton and Clackamas County, OR. These signals had both bicycle-specific indications and vehicle-only signals. A total of 4,673cyclists were observed. For each cyclist observed arriving on red, a set of descriptive variables were collected (e.g., age, sex, helmet use ...


A Study Of Headway Maintenance For Bus Routes: Causes And Effects Of “Bus Bunching” In Extensive And Congested Service Areas, Miguel A. Figliozzi, Wu-Chi Feng, Gerardo Lafferriere, Wei Feng Jul 2012

A Study Of Headway Maintenance For Bus Routes: Causes And Effects Of “Bus Bunching” In Extensive And Congested Service Areas, Miguel A. Figliozzi, Wu-Chi Feng, Gerardo Lafferriere, Wei Feng

Civil and Environmental Engineering Faculty Publications and Presentations

A healthy and efficient public transit system is indispensable to reduce congestion, emissions, energy consumption, and car dependency in urban areas. The objective of this research is to 1) develop methods to evaluate and visualize bus service reliability for transit agencies in various temporal and spatial aggregation levels; 2) identify the recurrent unreliability trends of bus routes (focusing on high-frequency service periods) and understand their characteristics, causes and effects; and 3) model service times using linear regression models.

This research utilized six months of archived automatic vehicle location (AVL) and automatic passenger count (APC) data from a low-performance route (Route ...


Analyzing And Quantifying The Impact Of Congestion On Ltl Industry Costs And Performance In The Portland Metropolitan Region, Miguel A. Figliozzi Jul 2012

Analyzing And Quantifying The Impact Of Congestion On Ltl Industry Costs And Performance In The Portland Metropolitan Region, Miguel A. Figliozzi

Civil and Environmental Engineering Faculty Publications and Presentations

Increased congestion during peak morning and afternoon periods in urban areas is increasing logistics costs. In addition, environmental, social, and political pressures to limit the impacts associated with CO2 emissions are mounting rapidly. A key challenge for transportation agencies and businesses is to improve the efficiency of urban freight and commercial vehicle movements while ensuring environmental quality, livable communities, and economic growth. However, research and policy efforts to analyze and quantify the impacts of congestion and freight public policies on carriers operations and CO2 emissions are hindered by the complexities of vehicle routing problems with time-dependent travel times and the ...


Exploratory Methods For Truck Re-Identification In A Statewide Network Based On Axle Weight And Axle Spacing Data To Enhance Freight Metrics: Phase Ii, Mecit Cetin, Christopher M. Monsere May 2012

Exploratory Methods For Truck Re-Identification In A Statewide Network Based On Axle Weight And Axle Spacing Data To Enhance Freight Metrics: Phase Ii, Mecit Cetin, Christopher M. Monsere

Civil and Environmental Engineering Faculty Publications and Presentations

Vehicle re-identification methods can be used to anonymously match vehicles crossing two different locations based on vehicle attribute data. This research builds upon a previous study and investigates different methods for solving the re-identification problem and explores some of the factors that impact the accuracy of the results. To support this work, archived data from weigh-in-motion (WIM) stations in Oregon are used for developing, calibrating, and testing vehicle re-identification algorithms. In addition to the Bayesian approach developed by the researchers in the previous study, a neural network model is developed for solving the re-identification problem. The results from the testing ...


Development And Sensitivity Testing Of Alternative Mobility Metrics, John Gliebe, James G. Strathman Mar 2012

Development And Sensitivity Testing Of Alternative Mobility Metrics, John Gliebe, James G. Strathman

Urban Studies and Planning Faculty Publications and Presentations

The Oregon Highway Plan’s (OHP) mobility policies guide various planning and programming activities of the Oregon Department of Transportation (ODOT). Among these activities are ODOT’s land use change review responsibilities under the Transportation Planning Rule, as adopted by the state’s Land Conservation and Development Commission. This report examines supplemental transportation performance metrics beyond the volume-to-capacity metric that currently supports OHP mobility policies. Selected supplemental metrics are empirically analyzed using a travel demand model calibrated for a Medford, Oregon study area.


Development Of The Oregon Traffic Safety Data Archive: Phases 1 And 2, Christopher M. Monsere, Myenwoo Lim, Chengxin Dai, Xiaowei Wu Mar 2012

Development Of The Oregon Traffic Safety Data Archive: Phases 1 And 2, Christopher M. Monsere, Myenwoo Lim, Chengxin Dai, Xiaowei Wu

Civil and Environmental Engineering Faculty Publications and Presentations

This report describes the preliminary work to develop the Oregon Traffic Safety Data Archive (OrTSDA). The mission of OrTSDA is to "build the knowledge base of traffic safety data in Oregon". The archive hopes to become a valuable traffic safety data resource with researchers, practitioners, and community supporters. As envisioned, the archive will provide current and historical versions of related data, encompass complete documentation, and contain an online interface to the variety of traffic safety related data. Working with partner state agencies, the archive contains reported motor vehicle crashes statewide, population data, estimates of vehicle miles traveled, traffic crime, and ...


Electric Vehicle Charging Infrastructure Community Needs Assessment, Robert Parker, Juli Brode, John Rowell Mar 2012

Electric Vehicle Charging Infrastructure Community Needs Assessment, Robert Parker, Juli Brode, John Rowell

TREC Final Reports

Dependence on fossil fuels, climate change, and degraded air quality are forcing the auto industry and consumers to seek alternative solutions to the current transportation system. Significant technical breakthroughs are allowing automakers to develop electric vehicles (EVs) that transcend some of the key barriers that limited them historically. Plug in electric vehicles entered the Oregon marketplace in early 2011. A range of reports suggest the demand for EVs will grow rapidly once affordable highway speed vehicles become available. ODOT identified the lack of a reliable network of electric vehicle service equipment (e.g., charging stations) that increases the range of ...


Extraboard Management: Trimet Case Study, James G. Strathman, Sung Moon Kwon, Steve Callas Feb 2012

Extraboard Management: Trimet Case Study, James G. Strathman, Sung Moon Kwon, Steve Callas

TREC Final Reports

This paper examines extraboard operations and management at TriMet, the transit provider for the Portland Oregon metropolitan area. The extraboard consists of a pool of operators who fill open work resulting from absences and other causes. The paper first examines the general performance of the extraboard in filling open work, drawing on seven years of daily operations data from three bus garages. It then presents statistical analyses focusing on open work patterns and the effects of selected work rules on operator utilization and service delivery. Lastly, suggestions are made for improving the efficiency of extraboard operations.


Regional Transportation And Land Use Decision Making In Metropolitan Regions: Findings From Four Case Studies, Richard D. Margerum, Susan Brody, Robert Parker, Gail Mcewen, Terry Moore Feb 2012

Regional Transportation And Land Use Decision Making In Metropolitan Regions: Findings From Four Case Studies, Richard D. Margerum, Susan Brody, Robert Parker, Gail Mcewen, Terry Moore

TREC Final Reports

Throughout the United States, metropolitan regions face increasingly complex issues related to transportation and land use. The diffuse nature of decision making creates a need to better coordinate land use and transportation to address issues such as: congestion, infrastructure costs, and greenhouse gas emissions. Key players in this decision making are regional metropolitan planning organizations (MPOs) with transportation planning authority, regional planning responsibilities, and in some cases regional land use planning authority. The goal of this study was to describe and assess efforts by regional agencies to coordinate land use and transportation. Policies and processes in four key topic areas ...


Bicycle And Pedestrian Engineering Design Curriculum Expansion, Ashley Haire Feb 2012

Bicycle And Pedestrian Engineering Design Curriculum Expansion, Ashley Haire

TREC Final Reports

This project summary report describes the execution of OTREC Project #298 (Development, Deployment and Assessment of a New Educational Paradigm for Transportation Professionals and University Students). The project is one facet of a multiyear collaboration of the Region X Transportation Consortium that was sponsored by the Federal Highway Administration (FHWA). The regional collaboration aims to shift the traditional paradigm of engineering course delivery to foster a more hands-on approach. The University of Idaho, for example, has created activity-based modules for a traffic signals course, while the University of Washington developed similar modules for a freight systems course. The focus of ...


Calibrating The Hsm Predictive Methods For Oregon Highways, Karen Dixon, Christopher M. Monsere, Fei Xie, Kristie Gladhill Feb 2012

Calibrating The Hsm Predictive Methods For Oregon Highways, Karen Dixon, Christopher M. Monsere, Fei Xie, Kristie Gladhill

TREC Final Reports

The Highway Safety Manual (HSM) was published by the American Association of State Highway and Transportation Officials (AASHTO) in the spring of 2010. Volume 2 (Part C) of the HSM includes safety predictive methods which can be used to quantitatively estimate the safety of a transportation facility. The resulting information can then be used to provide guidelines to identify opportunities to improve transportation safety. The safety performance functions (SPFs) included with this content, however, were developed for several states other than Oregon. Because there are differences in crash reporting procedures, driver population, animal populations, and weather conditions (to name a ...


Weaving Together A Knowledge Community, Aaron Maples, Bob Sack, Brett Walker, Chris Mulcahy, Daniel Navarro-Gomez, Jan Frutiger, Jeremy Grotbo, Melissa Peavey, Sofie Malm, Steffanie Lorentzen Jan 2012

Weaving Together A Knowledge Community, Aaron Maples, Bob Sack, Brett Walker, Chris Mulcahy, Daniel Navarro-Gomez, Jan Frutiger, Jeremy Grotbo, Melissa Peavey, Sofie Malm, Steffanie Lorentzen

Urban Design Workshop

The purpose of this document is to propose a framework for future development that result in a connected and integrated collection of neighborhoods that form the larger University District. Design Principles guide the proposed Concept Plan. Improving multi-modal transit corridors will result in a more seamless transition between neighborhoods. Key objectives of the study include:

  • Completing the fabric: Connect adjacent neighborhoods through meaningful design
  • Erasing edges: Overcome barriers created by large-scale infrastructure
  • Connections, continuity and accessibility: Create a connected community for all users
  • Extending the urban core: Redesign areas for a more urban, vital experience
  • Global knowledge exchange: Use the ...


Indicators Of The Metroscape: Emissions, Michael Burnham Jan 2012

Indicators Of The Metroscape: Emissions, Michael Burnham

Institute of Portland Metropolitan Studies Publications

Brief article outlining transportation-related greenhouse gas emissions in the Portland Metropolitan Area.