Street layout and design, once established, are then not easily changed. Urban form affects community development, livability, sustainability, and traffic safety. There has been an assumed relationship between urban form and traffic safety that favors designs with less through streets to improve safety. An empirical study to test this assumed relationship was carried out for crash data for Portland, Oregon. This thesis presents an empirical methodology for analyzing the relationship between urban form and traffic safety utilizing a uniform grid for the spatial unit. Crashes in the Portland, Oregon city limits from 2005-2007 were analyzed and modeled using negative binomial regression to study the effect of urban form and street layout through factors on exposure, connectivity, transit accessibility, demographic factors, and origins and destinations. These relationships were modeled separately by mode: vehicle crashes, pedestrian and bicycle crashes. Models were also developed separately by crash type and by crash injury severity. The models found that urban form factors of street connectivity and intersection density were not significant at 95% confidence for vehicle and pedestrian crash rates, nor for different crash severity levels, indicating that high connectivity grid street layout may have comparable safety to loops and lollipops, in contrast to results in earlier studies. Elasticity for all models was dominated by VMT increases. Business density, population and transit stops were also significant factors in many models, underlining the importance not only of street layout design, but also planning to direct development to influence where businesses, employment, and housing will grow and handle traffic volumes safely.

Portland student Services, Inc. (PSS), a non-profit student housing corporation, was created under circumstances that were especially arduous. Although thousands of students attending Portland State University in the late 1960s needed housing, state law prohibited the university from providing residential facilities . Many students lived in dilapidated apartment buildings in downtown Portland and faced dislocation from urban renewal programs initiated by the Portland Development Commission. Activists who set out to establish student-run housing also faced hostility from policymakers who resented student-led initiatives in politics and university governance. However, these dedicated student activists aligned with members of the Portland business community and overcame formidable obstacles in establishing permanent student-run housing. In the process, PSS had to contend with difficult political, socio-cultural, and environmental issues. The present study focuses on four major themes: 1) the character of the student housing problem and related legal issues; 2) creation of Portland Student Services; 3) the early operation of PSS; 4) the struggle over construction of off-campus housing.

The present thesis chronicles the decision to replace Portland, Oregon's Harbor Drive, a downtown highway located between Front A venue and the Willamette River, with Tom McCall Waterfront Park, a thirty-seven acre linear greenway, in the late 1960s and 1970s. These events provide an example of the battle against the ascendancy of the automobile and the ability of concerned citizen groups to affect city planning decisions.

The continued increase in homelessness in Portland, Oregon is in part a result of the systemic restructuring of the welfare state as well as a shift in local governance purviews. Primarily this has eradicated the affordable housing stock in the city which is compounded by the limited availability of emergency shelter spaces. These and other financial constraints have left a depleted service support system to cover a rising homelessness problem. In response to this, contemporary social movements have been focusing attention on economically marginalized groups such as the homeless, calling for rights to access resources in cities such as housing. This approach critiques the neoliberal policies that have bolstered entrepreneurial approaches to urban growth. Neoliberal policies result in a failure to maintain financial support for the well-being of the homeless and connected support services. This research examines one alternative to the traditional approach to sheltering the homeless. It focuses on a self-organized homeless tent city in downtown Portland, Right 2 Dream Too, which has become a critical resource in homeless emergency service provisioning. The rest site's success as an emergency service is primarily predicated on its geographic proximity to a nexus of social services in the Old Town neighborhood. Drawing on ethnographic work and archival data, I analyze the multiple spatialities of this self-managed site to better understand homeless individuals' experience with this place and other related spaces, as a means to understand its value as an emergency service for the homeless in Portland, and other cities with similar constraints. I argue this perspective is essential for mitigating homelessness in Portland and informing the decision-making surrounding its relocation.

This study takes a cultural perspective in studying the "Alberta Arts District," a gentrifying neighborhood in Northeast Portland in which bohemian cultural production/consumption has become the dominant and commodified vision of the community. Survey data demonstrates residents' general opinions and levels of participation in the changing neighborhood. Forty long-time residents, black and white, homeowners and renters, are interviewed in-depth regarding their perceptions of change. Long-time residents of gentrifying neighborhoods are often overlooked as a less powerful group that only has to negotiate rising rents and property values. This study approaches the meaning of neighborhood changes for long-time residents who have the potential to react culturally, socially, and economically in a neighborhood where racial and economic differences are structured by segregation and divestment. In the course of identifying positive, negative, and mixed feelings about changes, long-time residents also establish their belonging in the neighborhood as it changes around them. This is often done through constructing symbolic boundaries around newcomers, new businesses, and new cultural events in the neighborhood. This study finds that although most long-time residents perceive changes to be positive, race and homeownership affect different outcomes for different groups. Particularly, long-time black residents may establish belonging as being black in a diminishing black community, whereas long-time white homeowners may establish belonging by being homeowners in the context of positive changes.

This study explored the nature of community power and decision-making surrounding the renaming of Portland's Union Avenue in honor of the slain civil rights leader, Martin Luther King, Jr. Employing an integrated theoretical framework based on G. William Domhoff's (1967) perspective of the compatibility of c. Wright Mills' Power Elite Model (1956) and Robert A. Dahl's Pluralist Model (1961) plus Claude s. Fischer's (1982) perspective on the nature of the urban social environment, this study attempted to provide insight into and understanding of the dynamics involved in the controversy that developed over the efforts to rename a street for Dr. King, the decision-making process, and the apparent motivations of the participants.

This study's objective was to examine the affect that migration and employment have on immigrant women's negotiating position within the household. Depth interviews were conducted with nine women who migrated to Portland, Oregon from Ethiopia or Eritrea. Women were encouraged to share a narrative history of their migration and employment experience. These interviews were analyzed to answer three primary questions: Who are immigrant women supporting through their participation in the paid labor market? How do women utilize gain access to employment opportunities and what strategies do women use once employed to meet competing demands on them at work and in the household? And finally, to what extent do women maintain control over their income and influence household decisions? This study found that women, particularly women who migrate prior to marriage, support natal households more than women who migrate after marriage. Women use social networks to find information about jobs, and once employed use an array of strategies to meet domestic demands. These strategies include joining households with other women to share household labor, finding employment opportunities that allow them to care for children while working, and having their mothers come to care for small children. Women who have recently married and have lived in the United States a short amount of time are most likely to express desire to maintain control over their income, while women who have lived in the United States for a longer time are more likely to pool their income with their husbands. Many women felt that they had an equal influence in household decisions as their husbands, but little evidence was provided that this was the case. Instead this study concludes that working outside of the home increases the perceived contribution that women make to the household leads to their empowerment and improves their negotiating position.

Portland, OR, is the site of a unique urban food cart phenomenon that provides opportunities for small business ownership and access points for culturally specific food for the city's foreign-born and minority populations. Known as a "foodie haven," Portland also has an active sustainable food movement with engaged citizens and support from city and regional policies aimed at significantly increasing the consumption of local food. To date, there have been no in-depth studies on the sourcing habits of Portland food cart owners and whether or not these street-level actors are involved in the area's local alternative food movements (AFNs). The current understanding of the Portland food cart phenomenon is based on studies that have focused on carts and pods located in the central business district and "inner-ring" areas of the city. Areas beyond these locations (defined as Eastern Portland) are currently home to the majority of the city's growing foreign-born and minority populations. This thesis uses a situational analysis framework to explore the food supply practices of ethnic food cart owners operating in Eastern Portland cart pods. I investigate the feasibility of purchasing locally grown ingredients for use in ethnic cuisines and the degree to which cart owners incorporate the region's prevailing locavore ethics into their everyday culinary practices. Findings from this inquiry suggest that ethnic cart owners in Eastern Portland have a range of habitus, or personal dispositions and embodied knowledge, that is reflected in how they perceive the benefits of and barriers to "buying local" and the extent (if any) that they engage with AFNs in the Portland area. I assert that ethnic food cart owners in Eastern Portland are performing multiple community roles by providing access points for culturally specific cuisines for their particular ethnic groups, while also offering exotic experiences to other residents and tourists alike. I discuss variations within the food cart phenomenon itself by highlighting the differences in design, amenities, types of access, and neighborhood customer bases of cart pods located in Eastern Portland. Finally, I discuss future research directions for understanding the dynamics of food supply chains in small-scale, direct-to-vendor relationships and the implications for local and regional food sustainability policy goals.

The risk of spread and establishment of invasive species to interior habitat within urban parks is of great concern to park managers and ecologists. Informal trails as a vector for this transmission are not well understood. To characterize effects of informal trails on understory plant communities, I conducted a study of the informal trail network in Forest Park, Portland, Oregon. The system of 382 informal trails was mapped and evaluated qualitatively, and from this population a systematic sample was selected for analysis. To identify hotspots of informal trail activity, showing the relationship of informal trails to formal trails, other park features, and trail use level, I evaluated all mapped trails using line density spatial analysis tools. To characterize understory communities, thirty transects were placed along informal trails, with paired transects along nearby formal trails for comparison. I measured percent cover by species for non-graminoid understory plants, and percent total plant cover at different structural layers, for quadrats at regular intervals from the trail edge. I calculated richness and Shannon-Weaver diversity for non-graminoid understory plants. For community analysis, species were grouped by dispersal strategy, native status, and growth form. Observations from system mapping suggest that "hidden" behaviors drive many informal trails: bathroom stops, party spots, waste dumping, and camps make up 28% of all informal trails. Trails to private property are few but represent over 29% of total trail length. Informal trail density is highest along Balch Creek. Hotspots of informal trail presence are associated with trailheads, trail intersections, and water access. Quadrats located within one meter of informal trails showed higher richness and diversity due to increased number of introduced and ruderal species. Formal trails exhibit these same patterns to a stronger degree and over a greater distance (two meters) from the trail edge. Distance from trail edge explained variation in plant communities when grouped by dispersal type, but not by growth form. This study shows that although informal trails are widely distributed throughout the park, they are concentrated in high use areas. The presence of informal trails leads to significant changes in Forest Park plant communities that favor invasive and ruderal species, but these effects appear limited to two meters from the trail edge.

The Stephens Creek Watershed in southwest Portland, Oregon was chosen by the city as a pilot project for urban stream restoration efforts, and the infiltration of stormwater was identified as a potential restoration strategy. The Stephens Creek Watershed has historically been known to be unstable during high precipitation events (Burns, 1996), and the need to address the response of slope stability to anthropogenically-driven changing groundwater conditions is the focus of this study. Airborne light detection and ranging (LiDAR) and geotechnical data from the City of Portland were employed to create a high resolution (0.84 m2) physics-based probabilistic slope stability model for this watershed, using the map-based probabilistic infinite slope analysis program PISA-m (Haneberg, 2007). Best and worst case models were run using fully dry and fully saturated soil conditions, respectively. Model results indicate that 96.3% of the watershed area had a probability [less than or equal to] 0.25 that the slope factor of safety (FOS) was [less than or equal to] 1 for fully dry conditions, compared to 76.4% for fully saturated conditions. Areas that had a probability [greater than or equal to] 0.25 that the slope factor of safety (FOS) was [less than or equal to] 1 were found to occur mainly along cut/fill slopes as well as within the deeply incised canyons of Stephens Creek and its tributaries. An infiltration avoidance map was derived to define areas that appear to be unsuitable for infiltration. Based on these results, it is recommended that stormwater continues to be directed to existing sewer infrastructure and that the "storm water disconnect" restoration approach not be used by the city.