Environmental Engineering Commons^™

Towards Effective Design Treatment For Right Turns At Intersections With Bicycle Traffic, David Hurwitz, Mafruhatul Jannat, Jennifer Warner, Christopher M. Monsere, Ali Razmpa

Civil and Environmental Engineering Faculty Publications and Presentations

The overall goal of this research was to quantify the safety performance of alternative traffic control strategies to mitigate right-turning vehicle-bicycle crashes at signalized intersections in Oregon. The ultimate aim was to provide useful design guidance to potentially mitigate these collision types at the critical intersection configurations. This report includes a comprehensive review of more than 150 scientific and technical articles that relate to bicycle-motor vehicle crashes. A total of 504 right-hook crashes were identified from vehicle path information in the Oregon crash data from 2007-2011, mapped and reviewed in detail to identify the frequency and severity of crashes by …

Development Of A Pedestrian Demand Estimation Tool, Kelly Clifton, Patrick Allen Singleton, Christopher D. Muhs, Robert J. Schneider

Civil and Environmental Engineering Faculty Publications and Presentations

Most research on walking behavior has focused on mode choice or walk-trip frequency. In contrast, this study is one of the first to analyze the destination choice behaviors of pedestrians. Using about 4,500 walk trips from a 2011 household travel survey in the Portland, OR, region, we estimated multinomial logit pedestrian destination choice models for six trip purposes. Independent variables included terms for impedance (walk-trip distance); size (employment by type, households); supportive pedestrian environments (parks, a pedestrian index of the environment variable called PIE); barriers to walking (terrain, industrial-type employment); and traveler characteristics. Unique to this study was the use …

Toward A Spatial-Temporal Measure Of Land-Use Mix, Steven R. Gehrke, Kelly Clifton

Civil and Environmental Engineering Faculty Publications and Presentations

Urban planning and public-health research has long been interested in the connection between land-use mix and travel. Interest from urban planners stems from the potential of transportation efficiency gains achieved by an increased land-use mix and subsequent shortening of trip lengths; whereas, public-health research advocates an increased land-use mix as an effective policy for facilitating greater physical activity. Yet, despite the transportation, land-use, and health benefits related to improving land-use mix and the extent of topical attention given by researchers, no consensus has been reached regarding the magnitude of its effect on travel. This absence of agreement may largely be …

A Simplified Method For Analyzing Factors Contributing To Motorcyclists’ Fatal Injuries In Ohio, Deogratias Eustace, Vamsi Krishna Indupuru

Deogratias Eustace

The aim of this paper was to analyze traffic crash data by using a simplified method in determining significant factors that increase the risk of a motorcyclist being fatally injured once involved in a motorcycle crash in Ohio. The concept of overrepresentation, which is similar to relative risk, was used in identifying significant variables associated with the elevated risk of a motorcycle crash resulting into a fatality. The overrepresentation factor (ORF) was calculated for each variable of interest. The ORF offers a simple but powerful procedure of determining whether a certain factor significantly occurs more or less frequently in one …

Development Of A Pedestrian Demand Estimation Tool: A Destination Choice Model, Christopher D. Muhs, Kelly Clifton, Patrick Allen Singleton, Robert J. Schneider

Civil and Environmental Engineering Faculty Publications and Presentations

There is growing support for improvements to the quality of the walking environment, including more investments to promote pedestrian travel. Planners, engineers, and others seek improved tools to estimate pedestrian demand that are sensitive to environmental and demographic factors at the appropriate scale in order to aid policy-relevant issues like air quality, public health, and smart allocation of infrastructure and other resources. Further, in the travel demand forecasting realm, tools of this kind are difficult to implement due to the use of spatial scales of analysis that are oriented towards motorized modes, vast data requirements, and computer processing limitations.

To …

Container Houses, Tran Joseph, Anissa Rosbaugh, Sydne Scott, Hanan Yassin

PSU High School Innovation Challenge

We have noticed that there is an increasing number of homeless in our community. People who are homeless have a more difficult time getting jobs, making it harder to for them to get back on their feet.

Homeless is defined as a person without a stable place to live, in risk of being homeless. Homeless under Federal status, is defined as fleeing/attempting to escape domestic violence. Examples of homelessness include couch surfing, sleeping in shelters, and living in a car.

Our proposal was to build homeless shelters out of shipping containers.

Cleaning Up The Cities Of Tomorrow, Miguel Campos, Jack Chen, Alex Gaiovych, Fernando Lauer, Kaleb Swoverland, Anna Velikoretskikh, Jason Yu

PSU High School Innovation Challenge

A huge problem with current modernized and non modernized cities is the amount of trash being thrown away. There is a tremendous amount of recyclable material that is being thrown away with non recyclable waste into massive landfills. Even though we can not physically see the trash that we throw away on the street, it must still go somewhere. Some of that waste is toxic, other waste is made of non decomposable material. These massive waste disposal sites hurt animals, damage soil, and harm the health people living nearby.

In 2007, Americans threw out about 570 billion pounds of municipal …

Smarter Cycling, Cory Koehler, Richard Smith, Sarah St. Clair, Alex Taylor, Aubrey Masten, Konon Phillips

PSU High School Innovation Challenge

With the current trend of urbanization, the populations of major cities such as Portland are steadily increasing. This is causing a variety of problems, both within the city and in rural areas. In regards to the city, the major challenges facing city planners are the need for the expansion of residential neighborhoods and a rise in traffic throughout the city. One way to tackle the issue of an abundance of traffic, is to make alternate means of transportation more appealing to residents. We chose to focus on bicycling because of the bike‐friendly culture already in place in Portland. An increase …

Better Engaging Communities: Moving Beyond Cardinal Rules, Anna G. Hoover

Anna G. Hoover

“Cardinal rules” and best practice approaches have guided governmental risk communication efforts at chronic risk sites for more than two decades, playing an important role in how those most affected by contamination make sense of risk. In addition to providing information, however, communication approaches themselves can affect community perceptions indirectly, through stakeholder interpretations of the processes by which risk information is shared. It is increasingly necessary to evaluate not only whether risk communication approaches have been effective for increasing knowledge but if, in fact, the ways in which information is shared has had unintended consequences that change how stakeholders perceive …

A Level-Of-Service Model For Protected Bike Lanes, Nick Foster, Christopher Monsere, Jennifer Dill, Kelly Clifton

Civil and Environmental Engineering Faculty Publications and Presentations

Several methods exist for quantifying the quality of service provided by a roadway from a bicyclist’s perspective; however, many of these models do not consider physically protected bike lanes and, of those that do, none is based on empirical data from the US. This is problematic as engineers, planners, and elected officials are increasingly looking to objective performance measures to help guide transportation project design and funding prioritization decisions. This paper addresses this gap by presenting a cumulative logistic model to predict user comfort on protected bike lanes developed from data collected during in-person video surveys. The surveys were conducted …

Adjusting Ite’S Trip Generation Handbook For Urban Context, Kelly J. Clifton, Kristina Marie Currans, Christopher D. Muhs

Civil and Environmental Engineering Faculty Publications and Presentations

This study examines the ways in which urban context affects vehicle trip generation rates across three land uses. An intercept travel survey was administered at 78 establishments (high-turnover restaurants, convenience markets, and drinking places) in the Portland, Oregon, region during 2011. This approach was developed to adjust the Institute of Transportation Engineers (ITE) Trip Generation Handbook vehicle trip rates based on built environment characteristics where the establishments were located. A number of policy-relevant built environment measures were used to estimate a set of nine models predicting an adjustment to ITE trip rates. Each model was estimated as a single measure: …

Book Review, Earthea Nance

Earthea Nance, PhD (Stanford University, 2004)

Book Review published in the journal Water International (2015) The topic… “The book builds upon Nance’s research and presents a comprehensive account of Brazil’s experience of implementing condominial sewerage.” The topic… “From the very beginning, the author expresses her concerns in escaping from preconceived ideas about conventional and participatory development, positioning her views within a third wave of post-structural development discourse, neither universalist nor relativist, that is neither denying nor overvaluing the social content of development.” Research methods… “Nance manages to do so by integrating different areas of established knowledge and examining her research issue from a privileged historical perspective. …