Projects

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We examine the potential for walking and cycling to expand at the worldwide scale, and quantify the climate and health benefits. Working with Google, we leverage Environmental Insights Explorer data on mode shares for more than 11,000 cities, and examine how factors such as bicycle infrastructure and population density affect mode shares in different contexts.

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While much attention in the literature has focused on wildfire evacuation disparities tied to transportation and communications infrastructure and policy needs, limited focus has been on the transportation- and infrastructure-related needs to support recovery and resilience from wildfire events, and for vulnerable communities.

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A race to rebuild transportation infrastructure may preclude or increase the cost of other community-defined priorities that could emerge during the long recovery process. Once roadway repairs and reconstruction are underway, it becomes more difficult to pursue alternative transportation pathways, such as building complete streets or designing grids for more effective evacuation. The task of rebuilding therefore requires a community engagement process that is broader in scope than what transportation agencies typically use to promote public participation in transportation decision making.

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Mobility wallets are a relatively new approach to addressing financial barriers to travel among transport-disadvantaged communities. Individuals are provided with funds to pay for a range of mobility options, including transit and shared modes, at their discretion. Los Angeles’s Universal Basic Mobility Pilot will include at least 5,000 participants from the social justice community of South LA and monthly stipends that range from $24 to $150 loaded onto the local transit TAP card. The transit agency (LA Metro) has recruited local electric carshare, ride-hail, bikeshare, and scootershare programs to accept the TAP card as payment.

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Community college students spend more on transportation than their counterparts at public and private four-year colleges, partly due to the lack of on-campus or nearby affordable housing. Recent research highlights how transportation challenges are an overlooked but basic need for community college students.

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New transportation networks facilitate mobility and may also spur economic development. Over the past decades, a new transportation technology — high-speed rail (HSR) — has brought a profound impact on urban-regional accessibility and intercity travel across Europe and East and South-East Asia. But the economic and spatial impacts of HSR have been varied and are largely contingent on a variety of factors, as well as local planning and policy. As California is in the process of building its own HSR network, it is important to review the experience of established HSR networks abroad and understand the possible economic effects that HSR can bring to regional and local economies, and their prerequisites. While the impacts of California’s plan on the direct creation of jobs in local markets (e.g., construction sector) and on the travel sector (e.g., forecasts for HSR travel demand) have been investigated, the possible indirect impacts (e.g., on land values, tourism, firm location, and local and regional development) have not gathered enough attention. This research proposal attempts to fill this gap.

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This research project aimed to develop a guide of suggested practices for responding to, managing, and deterring encampments on the right-of-way. The suggested practices will address the challenges for state departments of transportation in the design, construction, and maintenance of pavements and consider social equity, environmental impacts, safety, legal issues, coordination with other agencies, and other relevant issues. The project’s interim report documents the research approach; present findings and analysis from the literature review, industry scan, and two surveys; and identifying existing and new practices.

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This project examines the consequences of freeway construction on neighborhoods of color across California: South Colton, West Fresno, and City Heights in San Diego. The construction of freeways was a contributing mechanism to the perpetuation of racial inequality, weakening social institutions, disrupting local economies, and physically dividing neighborhoods. In South Colton, a freeway was ultimately not built through its community of color, though largely for reasons of construction costs. City Heights, initially a predominantly non-Hispanic white neighborhood, underwent a demographic transformation driven by white flight during a decades-long pause in freeway construction. West Fresno did face consequences from freeway development but was also unique in its diversity of residents pre-freeway, including people of color and non-Hispanic white immigrant communities. Freeway development contributed to transforming West Fresno into an overwhelming community of color. Across these cases, freeways fragmented communities, displaced residents, and reinforced pre-existing racial divides. These racialized impacts stemmed from systemic socioeconomic marginalization and exclusion of people of color in the planning process.

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Youth in dense, central neighborhoods often walk to school and are likely to be impacted by unsafe streets with higher proportions of pedestrian-automobile crashes. Despite Vision Zero and Safe Routes to School programs, they remain disproportionately represented among traffic fatalities, which are the highest in a decade. For these youth, social danger influences their choice to frequent traffic-heavy streets, as these arterials are perceived safer for walking than the quieter, desolate residential streets. Youth’s urban paths are informed by “hot spots” (where crime and crash data indicate danger) as well as “safe spots” (where data indicate safety from crime and vehicular injury) which, when combined with youth perceptions, impact routes to and from school.

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Personal safety concerns continue to be one of the most critical issues among transit riders and women and gender minorities in particular. These safety concerns stem from the experience of sexual harassment that people who identify as women face frequently. While harassment can be a common occurrence, the vast majority of these experiences go unreported to transit agencies, leaving agencies without information about the magnitude of this problem on their system. This project details work with the San Francisco Municipal Transportation Agency (SFMTA) in their efforts to understand and address this problem. The SFMTA, working with two UCLA graduate students, designed a survey that drew from previous survey efforts and was tailored to address their interests and needs. This project documents the process of developing and deploying the questionnaire, in an effort to help other agencies take the first steps to better understanding rider safety and harassment.

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Frontline transit work can be satisfying and secure — but also stressful or unsafe. Many agencies across the state lacked transit operators in the wake of the pandemic, delaying service restoration. Interviews, wage data, and other sources demonstrate that these shortages were due to both compensation issues and longstanding issues of workforce safety, culture, and practices. Wages have stagnated over the past decade, though California operators earn more than their area’s median incomes, trucking employees, and comparable transit jobs in other states. Raises alone are necessary but not sufficient: pay is generally lower than necessary to attract and retain needed employees—and recent increases in pay and hardships in other aspects of the job point to the importance of factors beyond wages alone. Agencies, advocates, and unions will need to rethink and expand transit operations funding, raise wages, and implement a variety of reforms: reducing hiring hurdles, expanding outreach, making scheduling fairer, improving facilities and support offerings, removing enforcement duties from operators, and creating career pathways for advancement.

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The United States’ transportation workforce is currently at a skills deficit in key areas. New and innovative transportation technologies and approaches threaten to exacerbate this situation. Yet, transportation workers need more than skills to implement new technologies: they need the skills to critically determine which technologies are likely to support a thriving nation and under what conditions. Additionally, transportation workers need the skills to support non-technology-focused solutions to the nation’s transportation challenges, including cultural, political, and social change.

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This project for the California 100 initiative examines transportation in California: where we are today, how we got here, and where we might be headed. We begin with facts on travel and transportation systems in California today. We next explore the decades of public and private land development and transportation systems that have shaped the current state of play: today’s transportation problems stem, in significant part, from yesterday’s land use decisions. We then consider factors that have either recently come to the fore or are likely to emerge in the near future. We review possible context-specific reforms to reshape transportation in the state, in order to better manage vehicle travel and reduce chronic congestion, shift patterns of development to make them less car-dependent, and increase access for all. Finally, we summarize the findings from a diverse panel of transportation experts convened to explore the possibilities, pitfalls, and implications of four possible future transportation and land use scenarios for California.

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This project uses mixed methods to examine the systemic causes and consequences of the construction of Stockton, California’s Crosstown Freeway and of urban redevelopment for Asian Americans communities. In Stockton, state and local government implemented connected freeway and urban renewal programs. Xenophobia and racism placed Chinatown, Japantown, and Little Manila in their path. The choice of freeway route was racially biased. The neighborhood surrounding an unchosen route was predominantly white, whereas that of the chosen route was predominantly home to people of color. Freeway construction during the 1960s and 1970s directly displaced hundreds of people and housing units downtown—mainly people of color, particularly Asians. The communities most harmed were the Asian American enclaves, where the housing stock declined by about three quarters between 1960 and 1970. The losses were not only physical, as the freeway and redevelopment eviscerated once vibrant ethnic commercial hubs. Because of long-standing economic and political marginalization, Asian Americans were relatively powerless to prevent the destruction; nonetheless, they fought to build affordable housing for their people, protect and in some cases relocate cultural institutions, and support surviving ethnic businesses. In the long run, Stockton failed to revitalize its downtown, while destroying its cultural diversity.

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In recent decades, homelessness has become an increasingly major challenge in the U.S. Of the half million unhoused people in the U.S., many seek shelter in settings under the auspices of state departments of transportation (DOTs), such as freeways, underpasses, and rest areas. This project synthesizes existing literature and findings from interviews with staff from state DOTs, service providers, and organizations responding to homelessness. Homelessness represents a recognized and common challenge for DOTs, but the numbers and location of unhoused individuals in state transportation settings vary and fluctuate. As DOTs face jurisdictional, financial, and legal hurdles in responding, DOT staff employ both “push” and “pull” strategies, the most common of which is encampment removals. However, the effectiveness of such removals is limited. Other strategies include “defensive design” and, more proactively, establishing or partnering with low-barrier shelters, providing shelters and sanitation on DOT land, and coordinating rehousing and outreach efforts. The findings suggest that DOTs should acquire better data on homelessness on their lands, create a homelessness coordinating office, establish formal partnerships with nonprofits/service providers, and evaluate the necessity of encampment removals, through the development and utilization of prioritization criteria.

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The racist legacy of freeways has come into stark focus in the past year. This research focuses on one specific impact of freeways: neighborhood severance. Freeways disrupt the neighborhood street grid, creating particular hardships for pedestrians who must take circuitous routes to access transit and to walk to stores, schools, and other destinations. The impacts of disconnected streets on walking and public health are well documented (e.g. Handy 2003; Marshall et al. 2014; Barrington-Leigh and Millard-Ball 2019). But the environmental justice dimension of connectivity has remained unexplored, as has the link between most academic studies of street connectivity and local planning efforts. The research team will test the hypothesis that, while freeways disrupt street networks everywhere, the severance effects are greatest in BIPOC communities. This injustice might arise if White residents have more political voice to advocate for a denser mesh of local streets that cross the freeway, or to cancel a freeway proposal altogether.

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Prior to the COVID-19 pandemic, about five percent of the U.S. labor force worked primarily from home. Between February and April of 2020, the share of the labor force working from home skyrocketed to well over 50 percent in response to public health orders to contain the pandemic. While no one expects the share of those working from home to stay at such high levels as the pandemic recedes, there is considerable debate among experts on just how many workers will return full-time to employment sites. This research will review the well-established and substantial pre-pandemic literature on working from home and travel as well as the nascent but rapidly growing literature on working from home and travel in the COVID-19 pandemic to offer insights on the future of home/work location choices, commuting, and transportation mode usage, likely through the presentation of plausible future location/travel scenarios and their policy implications.

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For decades evaluation of the benefits and costs of new- or re- development in urban areas has centered on the effects of development on nearby traffic flows. Historically, and in most states outside of California, the level-of-service (LOS) scale has been used to approve or disapprove commercial developments. The logic of such an evaluation model is that smooth traffic flows are a primary goal of urban areas, which has the effect of discouraging the sorts of densely developed places that are more easily accessed by foot, bike, shared mobility, and public transit. To overcome the traffic flow focus of traffic impact analyses, the California legislature passed SB 743 in 2013, which mandated a change in the way that transportation impacts are analyzed under CEQA. New CEQA Guidelines were created to replace LOS with a new focus on how proposed developments affect vehicle miles of travel (VMT). This translational project will build on prior research, as well as the burgeoning literature on operationalizing access into transportation planning and engineering to develop and test some new analytical tools to evaluate the access impacts of developments.

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Street rights-of-way are typically a city’s most valuable asset. Streets serve numerous functions — access, movement, and the provision of space for on-street parking, children’s play, and social interaction. But the more land that is devoted to streets, the less land there is available for housing, parks, offices, and other land uses. In this research project, UCLA researchers quantified the width of streets in 20 of the largest counties in the United States, and the value of the land under those streets. This research found that streets in the U.S. are much wider than in other countries. Street widths are normally dictated by subdivision codes and local street design manuals. The highest street land values are found in coastal California, and streets could be much narrower.

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A recent survey by the Public Policy Institute of California shows that 85% of Californians are concerned about the presence of homeless people in their community and believe addressing this issue should be a top priority. Few scholars have studied the large and growing numbers of people who live in their vehicles. According to point-in-time count data from the 2019 Los Angeles Homeless Services Authority, over 40% of the unsheltered homeless population in LA County, some 14,000 people, rely on vehicles (cars, vans, RVs) for shelter. The increase in vehicular homelessness raises challenges for both people who are experiencing homelessness and for cities. Vehicle living can be cost-effective relative to sky-high rents, but residents often lack essential amenities. At the same time, residents complain about the adverse effects of vehicle encampments on their neighborhoods. In response, this project seeks to create a better understanding of vehicular homelessness as a way for both homeless providers and transportation officials alike to address this precarious form of shelter.