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Portland State University

PSU Transportation Seminars

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Articles 211 - 225 of 225

Full-Text Articles in Social and Behavioral Sciences

Regional Planning, Greenhouse Gases, And Urbanfootprint Open Source Software, Garlynn Woodsong Jan 2014

Regional Planning, Greenhouse Gases, And Urbanfootprint Open Source Software, Garlynn Woodsong

PSU Transportation Seminars

Since about 2008, the planning world has been experiencing a paradigm shift that began in places like California and Oregon that have adopted legislation requiring the linking of land use and transportation plans to outcomes, specifically to the reduction of greenhouse gases (GHGs). In response to this need, Calthorpe Associates has developed a new planning tool, called UrbanFootprint, on a fully Open Source platform (i.e. Ubuntu Linux, PostGIS, PostGreSQL, etc.). As a powerful and dynamic web and mobile-enabled geo-spatial scenario creation and modeling tool with full co-benefits analysis capacity, UrbanFootprint has great utility for urban planning and research at multiple …

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Modeling Injury Outcomes Of Crashes Involving Heavy Vehicles On Texas Highways, Salvador Hernandez Jan 2014

Modeling Injury Outcomes Of Crashes Involving Heavy Vehicles On Texas Highways, Salvador Hernandez

PSU Transportation Seminars

A growing concern related to large-truck crashes has increased in the State of Texas in recent years due to the potential economic impacts and level of injury severity that can be sustained. Yet, studies on large truck involved crashes highlighting the contributing factors leading to injury severity have not been conducted in detail in the State of Texas especially for its interstate system. In this study, we analyze the contributing factors related to injury severity by utilizing Texas crash data based on a discrete outcome based model which accounts for possible unobserved heterogeneity related to human, vehicle and road-environment. We …

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Effects Of The Objective And Perceived Built Environment On Bicycling For Transportation, Liang Ma, Jennifer Dill Jan 2014

Effects Of The Objective And Perceived Built Environment On Bicycling For Transportation, Liang Ma, Jennifer Dill

PSU Transportation Seminars

Effects of the Objective and Perceived Built Environment on Bicycling for Transportation:
This paper investigates the relative effects of the objectively-measured built environment versus stated perceptions of the built-environment on bicycling. Data are from a random phone survey conducted in the Portland, Oregon region. Binary logit and linear regression models, using objective measures, perceived measures, and both sets of measures, were estimated to predict odds of bicycling and frequency of bicycling separately. Results showed that the perceived environment and objective environment had independent effects on bicycling. This suggests that future bicycling research should include both perceived and objective measures of …

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Modeling The Impact Of Traffic Conditions On The Variability Of Mid-Block Roadside Pm2.5 On An Urban Arterial, Adam Moore Jan 2014

Modeling The Impact Of Traffic Conditions On The Variability Of Mid-Block Roadside Pm2.5 On An Urban Arterial, Adam Moore

PSU Transportation Seminars

Modeling Impact of Traffic Conditions on Variability of Midblock Roadside Fine Particulate Matter Concentrations on an Urban Arterial: This paper presents an innovative modeling of fine particulate matter (PM2.5) concentrations as a function of very high resolution meteorological and traffic data. Peak period measurements were taken at a mid-block roadside location on an urban arterial commuter roadway. To capture the impact of dynamic traffic conditions, data were analyzed at 10-second intervals, with substantially higher resolution than typical roadside air quality study designs. Particular attention was paid to changes in traffic conditions, including fleet mix, queuing and vehicle platooning over the …

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Identficaton And Characterization Of Pollutant Hot Spots Integratng Probe Vehicle, Traffic And Land Use Data, Katherine Eleanor Bell, Miguel Figliozzi Jan 2014

Identficaton And Characterization Of Pollutant Hot Spots Integratng Probe Vehicle, Traffic And Land Use Data, Katherine Eleanor Bell, Miguel Figliozzi

PSU Transportation Seminars

Identification and Characterization of PM2.5 and VOC Hot Spots on Arterial Corridor by Integrating Probe Vehicle, Traffic, and Land Use Data: The purpose of this study is to explore the use of integrated probe vehicle, traffic and land use data to identify and characterize fine particulate matter (PM2.5) and volatile organic compound (VOC) hot spot locations on urban arterial corridors. An emission hot spot is defined as a fixed location along a corridor in which the mean pollutant concentrations are consistently above the 85th percentile of pollutant concentrations when considering all other locations along the corridor during the same time …

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Evaluating Driver And Pedestrian Behaviors At Enhanced Multilane Midblock Pedestrian Crossings, Nick Foster Jan 2014

Evaluating Driver And Pedestrian Behaviors At Enhanced Multilane Midblock Pedestrian Crossings, Nick Foster

PSU Transportation Seminars

Case Study in Portland, Oregon This study examines driver and pedestrian behaviors at two enhanced midblock pedestrian crossings in Portland, Oregon. One crossing is on a five-lane arterial with a posted speed of 35/45 miles-per-hour (MPH) and features six rectangular rapid flash beacon (RRFB) assemblies and a narrow median refuge. The other crossing is on a suburban arterial with four travel lanes and a two-way left-turn lane. The crossing is enhanced with four RRFB assemblies and a median island with a “Z” crossing, or Danish offset, designed to encourage pedestrians to face oncoming traffic before completing the second stage of …

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Bicycling Is Different: Built Environment Relationships To Nonwork Travel, Christopher D. Muhs Jan 2014

Bicycling Is Different: Built Environment Relationships To Nonwork Travel, Christopher D. Muhs

PSU Transportation Seminars

There is growing investment in infrastructure to support non-motorized travel modes in the United States, in particular for bicycling. However, there remains a dearth of knowledge on the relationships between built environments and bicycling for non-work transportation. This issue is exacerbated by researchers and practitioners continuing to combine walking and bicycling into the category “non-motorized modes,” despite the two having many differences. This paper addresses these shortcomings through a segmented analysis of mode choice and mode share for walking, bicycling, and automobile travel. The data used are from a 2011 establishment intercept survey in the Portland, Oregon region and are …

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Benefit-Cost Evaluation Method For Transit Stop Removal, Zef Wagner Jan 2014

Benefit-Cost Evaluation Method For Transit Stop Removal, Zef Wagner

PSU Transportation Seminars

The introduction of wider stop spacing through the removal or consolidation of existing stops is one method transit agencies can use to reduce travel time and reliability on many transit lines. A great deal of research has been done to provide tools for determining optimal stop spacing, but tools are still needed to help service planners determine the optimal stops to remove. Stop-level bus performance data provide the information needed to develop a method for assessing the total benefits and costs to riders of removing individual stops. This tool compares the benefit to through-riders in terms of travel time savings …

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Piloting Portland's Multimodal Arterial Performance System, Shaun Quayle Nov 2013

Piloting Portland's Multimodal Arterial Performance System, Shaun Quayle

PSU Transportation Seminars

Shaun will present on the recently completed pilot demonstration of multimodal arterial performance measures for the Portland metro region, as part of the larger regional concept of operations. Treatments include a permanent bike count station on the Springwater Trail, permanent truck classification stations, Bluetooth travel time stations, as well as leveraging existing transit and signal controller data to paint a picture of the collective modal transportation system.

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Cyclist Compliance At Signalized Intersections, Sam R. Thompson Nov 2013

Cyclist Compliance At Signalized Intersections, Sam R. Thompson

PSU Transportation Seminars

Although the running of red lights is perceived by motorists as a commonplace behavior for cyclists, little research has been done on the actual rates of cyclist compliance at signalized intersections. Furthermore, little is known about the factors that influence cyclist non-compliance. This research seeks to illuminate the rates of and reasons for infringement against red lights using video footage and survey data from cyclists in Oregon.

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Why Doesn't That Traffic Signal Ever Turn Green? An Evaluation Of Roadway Markings For Cyclists, Stefan W. Bussey, Christopher Monsere, Peter Koonce Nov 2013

Why Doesn't That Traffic Signal Ever Turn Green? An Evaluation Of Roadway Markings For Cyclists, Stefan W. Bussey, Christopher Monsere, Peter Koonce

PSU Transportation Seminars

Signalized intersections often rely on vehicle detection to determine when to give a green light. The 2009 Manual of Uniform Traffic Control Devices (MUTCD) includes an on-pavement marking and curbside sign that public agencies can use to indicate where cyclists should position themselves while waiting at an intersection. This presentation reviews the effectiveness of current markings, signs, and other methods used to help cyclists properly position themselves over detection.

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Clouds, Crowds, And Traffic: What 10 Emerging Megatrends Mean For The Future Of Transportation, Ted Trepanier Nov 2013

Clouds, Crowds, And Traffic: What 10 Emerging Megatrends Mean For The Future Of Transportation, Ted Trepanier

PSU Transportation Seminars

Ten new megatrends will be presented with a discussion on the resulting shifts on the transportation industry. Details will include a look on broken trends and the new challenges introduced for transportation planning. Thoughts will also be presented introducing a pivot to the current model being pursued by the Connected Vehicle program. Finally, planners will be challenged to consider a new question for the future of our connected communities, you have to come to hear it.

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E-Bikes In The United States, John Macarthur Oct 2013

E-Bikes In The United States, John Macarthur

PSU Transportation Seminars

Electric bicycles (e-bikes) are well established in China and other Asian and European countries but have yet to realize their potential in the United States, although recently the number of e-bikes has been growing. Research on the economic, operational, and safety issues of e-bikes in the U.S. is limited. This research aims in part to understand if different bicycling technology, in this case electric assist bicycles or e-bikes, can reduce barriers to bicycling and encourage more bike trips and longer bike trips, and increase the diversity of people bicycling, including people with a disability or chronic injury to bicycle. Some …

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Transportation Analysis Informing Transportation Planning And Policy At Odot, Alexander Bettinardi Oct 2013

Transportation Analysis Informing Transportation Planning And Policy At Odot, Alexander Bettinardi

PSU Transportation Seminars

The Transportation Planning Analysis Unit (TPAU) at ODOT helps to provide information to a large variety of transportation plans, projects, and policy questions. This allows customers to make better informed decisions and to maximize limited resources. In order to fill this role TPAU and the Oregon modeling community have a fairly large "toolbox" of models and analysis tools and procedures. This transportation seminar will give an overview of the role and services that TPAU provides and the different tools and processes used to fulfill that role.

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Using Empirical (Real-World) Transportation Data To Extend Travel Demand Model Capabilities, Michael Mauch Oct 2013

Using Empirical (Real-World) Transportation Data To Extend Travel Demand Model Capabilities, Michael Mauch

PSU Transportation Seminars

Real-world traffic trends observed in PORTAL and INRIX traffic data are used to expand the performance measures that can be obtained from Portland Metro's travel demand model to include the number of hours of congestion that can be expected during a typical weekday and travel time reliability measures for congested freeway corridors.

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