Projects
Principal Investigator:
Dana CuffFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
Access to Opportunities, Transportation & Communities, Transportation & HealthYouth 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.
Principal Investigator:
John GahbauerFunding Source:
Resilient and Innovative Mobility InitiativeProgram Area(s):
Access to Opportunities, Environment, Public Transit, Transportation & CommunitiesThis project reports on changes and evolving operations in public transit during the COVID-19 pandemic. With a focus on transit ridership and transit service hours, this project first tracks where, how, and why transit supply and demand has changed. Since reaching an April 2020 nadir both nationally and in California, transit ridership has recovered slowly: as of July 2022, boardings were 61 percent and 56 percent of their respective national and California baselines. In California, service has been restored faster than riders have returned. This project next examines and showcases what established strategies for increasing transit ridership remain relevant in and post-pandemic.
Principal Investigator:
Anastasia Loukaitou-SiderisFunding Source:
Pacific Southwest Region 9 University Transportation CenterProgram Area(s):
Access to Opportunities, Transportation & HealthCalifornia’s freeways have come under increasing scrutiny for their disproportionately adverse impacts on low-income populations and populations of color. This project uses empirical research to not only understand but also quantify and describe in detail the historical impacts of freeways on communities of color in four California cities and areas: Pasadena, Pacoima, Sacramento, and San José. In these neighborhoods, freeways displaced many residents, significantly harmed those that remained, and left communities divided and depleted. The four cases differ in notable ways, but they share a disproportionate impact of freeway construction on communities of color. In Pasadena and Pacoima, decision-makers chose routes that displaced a greater share of households of color than proposed alternatives. Demolition and displacement were the most visible and immediate effects of the freeways, but toxic pollution, noise, economic decline, and stigmatization remained long after. In suburban areas, white, affluent interests often succeeded in pushing freeways to more powerless neighborhoods. Massive roadway construction complemented other destructive governmental actions such as urban renewal and redlining. Freeways and suburbanization were key components in the creation of a spatial mismatch between jobs and housing for people of color, with few transportation options to overcome it. Understanding the history of racism in freeway development can inform restorative justice in these areas.
Principal Investigator:
Jacob L. WassermanFunding Source:
Statewide Transportation Research Program & Resilient and Innovative Mobility InitiativeProgram Area(s):
Access to Opportunities, New MobilityThis project synthesizes three primary data sources—credit data, unemployment claims data, and small business loan and grant data—to explore the financial conditions of those who drive for a living before and during the COVID-19 pandemic in California. Automobile debt was high among groups likely to contain professional drivers. The occupational categories in which many drivers fall had high absolute and relative levels of automobile debt compared to other workers. After the onset of the pandemic, unemployment rose dramatically in the transportation industry and in transportation occupations, peaking at rates higher than the national average. However, state unemployment claims data, among transportation employee claimants only, show less of a spike. Contractor drivers lived in areas with more Pandemic Unemployment Assistance claims, a special program for self-employed workers like gig drivers. Finally, contractor drivers received unprecedented but uneven federal small business loans and grants. Drivers in many areas, however, did not receive much or any of these funds, though those areas that did tended to have more residents of color. Assessing the full effect of the pandemic on professional drivers’ debt and finances will require additional and better data, particularly workforce data from gig economy firms that contract with drivers.
Principal Investigator:
Paul M. OngFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
Transportation & CommunitiesThis project examines the spatial distribution of tenant-based Housing Choice Voucher (Section 8) units and Low-income Housing Tax Credit units to understand whether geographic patterns and trends are consistent with climate change and equity goals. The analysis compares the location of HCV and LIHTC units in 2012 and net changes from 2012 to 2019 with a number of transportation, environmental, and racial and economic equity metrics. The change in HCV units from 2012 to 2019 shows promising trends for reducing vehicle miles traveled and increasing walkability and transit accessibility. LIHTC unit locations are, at best, somewhat more sustainable than the state overall, with slightly lower-skewing vehicle miles traveled and better walkability, though low transit accessibility. What environmental gains there were, though, come at the cost of higher exposure to pollution. HCV and LIHTC units are also concentrated in disproportionately low-income neighborhoods and neighborhoods of color, with worse access to economic opportunity. The findings reveal an inherent structural dilemma in whether the HCV and LIHTC programs are able to simultaneously achieve climate and equity goals.
Principal Investigator:
Brian D. TaylorFunding Source:
California 100 InitiativeProgram Area(s):
Transportation & CommunitiesThis 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.
Principal Investigator:
Paavo MonkkonenFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
Transportation & CommunitiesLos Angeles County has spent tens of billions of dollars to build over 100 miles of rail transit, but today per capita transit ridership is 40 percent lower than before rail construction began. One reason for this startling failure is that LA remains overwhelmingly laid out for the automobile: it is a low-density, parking-heavy landscape where the built environment is not conducive to transit use. Our analysis will compare costs, project timelines, and community benefits of by-right and nearby discretionary projects. We will estimate reductions in project costs and time to market resulting from by-right approvals and compare benefits by assessing differences in affordable units provided by developers. This analysis will be used to project impacts to housing affordability and availability near transit, with estimated mobility impacts that could result, including changes to transit usage and vehicle-miles traveled.
Principal Investigator:
Madeline BrozenFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
Access to Opportunities, Transportation & CommunitiesA 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.
Principal Investigator:
Jiaqi MaFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
New MobilityTransportation agencies use travel demand models (e.g., four-step models, activity-based models, dynamic traffic assignment models) to evaluate transportation improvement projects. However, existing travel demand models are unable to account for capacity changes of the network and mode shifts associated with connected and automated vehicle (CAV) technologies and services. This project aims to lay a foundational framework for the development of planning-level analysis capability that includes CAVs and engage in a small scale case study, toward a vision where practitioners have CAV-aware tools available. The research team will work with stakeholders in the Southern California Association of Governments (SCAG) to identify current needs in modeling CAVs and new mobility services in demand models. The project will develop methodologies to enhance the existing SCAG activity-based demand model, and the areas of enhancements include, but not limited to, capacity adjustments and new scenarios of travel behavior/choice modeling.
Principal Investigator:
Adam Millard-BallFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
Transportation & Communities, Transportation & HealthThe 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.
Principal Investigator:
Michael ManvilleFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
Traffic, Transportation FinanceThe project’s ultimate goal is threefold. First, we will deliver a broad but accurate and relevant snapshot of vulnerable travelers in California. Second, we will use that information to carefully consider how different forms of congestion pricing might improve or degrade equity. Third and most important, we will use lessons from other safety net programs, and particularly those operating in the utility industry in California, to propose specific safeguards for poor and marginalized populations that can be built into congestion charging programs. We examine the fairness implications of congestion pricing and propose policy mechanisms to mitigate its potential unfair outcomes. Our project first empirically establishes the broad contours of travel by vulnerable populations in California’s major metropolitan areas. We then examine particular forms of congestion charging, and evaluate how they might affect equity. Finally and most importantly, we draw on models of the guardrails instituted by other public utilities to illustrate ways to have congestion pricing while still protecting low-income travelers.
Principal Investigator:
Teo WicklandFunding Source:
USDOT FHWA Talent DevelopmentProgram Area(s):
New Mobility, Transportation & CommunitiesThe 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.
Principal Investigator:
J.R. DeShazoFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
EnvironmentAviation is a difficult sector to decarbonize. The high energy and power requirements of flight make electrification challenging and low-carbon liquid fuels face their own technical and practical hurdles. While much of the attention on air transportation pertains to passenger travel, the relatively smaller air cargo industry faces similar challenges to decarbonization as the passenger airline industry. In the face of a difficult to decarbonize aviation sector, carbon savings may be realized by facilitating modal shifts from air transportation to less-polluting ground transportation where feasible. California’s effort to build a high-speed rail network for interregional travel in California is an example of such a strategy and features prominently in the state’s Scoping Plan as one pathway towards meeting 2050 GHG emissions reduction targets in the transportation sector. Luskin Center for Innovation researchers propose conducting an exhaustive search of the relevant peer reviewed and grey literature on studies that examine the economic and environmental effects of policies, programs, and projects aimed at shifting passenger and cargo movements from the air to the ground.
Principal Investigator:
Martin WachsFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
Access to OpportunitiesCalifornia is growing faster and aging more rapidly than America as a whole. California’s population aged 60 years and over is expected to grow more than three times as fast as the total population. Older adults age in place – increasingly in suburban areas where access to transit and pedestrian-friendly neighborhoods is limited. Data from the 2017 National Household Travel Survey show that people over age 65 made 86% of their trips by automobile; 66% as drivers. As they age, however, many older adults limit their driving and ultimately lose the ability to drive altogether, affecting their quality of life in old age. This study explores relationships between aging, travel, mobility and residential relocation using a unique longitudinal database rarely before used in transportation research, the Health and Retirement Survey, augmented by other measures, such as transit accessibility.
Principal Investigator:
Martin WachsFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
Transportation FinanceThe COVID-19 pandemic dramatically affected transportation systems, including the ability of localities to pay for them. This project explores the effects of the pandemic and the associated economic turbulence on local option sales taxes (LOSTs), an increasingly common revenue source for transportation in California and across the U.S. During times of economic weakness, spending and therefore LOST revenues will lag—the pattern in California counties during the initial months of the pandemic. Fortunately for local transportation budgets, LOST revenues recovered after the initial economic shock of COVID-19, albeit at a lower level than they likely would have otherwise. LOST revenue trends during the pandemic were affected by national and regional economic conditions and government policy as well. This public health crisis illustrates both the pitfalls and resilience of LOSTs during economic downturns and recoveries.
Principal Investigator:
Anastasia Loukaitou-SiderisFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
Public Transit, Transportation & CommunitiesMore than half a million individuals experience homelessness every night in the U.S. With the scale of the crisis often surpassing the capacities of existing safety nets — all the more so since the onset of the COVID-19 pandemic — many turn to transit vehicles, stops, and stations for shelter. Many also use transit to reach destinations such as workplaces, shelters, and community service centers. This project investigates the intersections of the pandemic, transit, and homelessness; the scale of homelessness on transit; and how transit agencies are responding to the problem. All told, centering the mobility and wellbeing of unhoused riders fits within transit’s social service role and is important to improving outcomes for them and for all riders.
Principal Investigator:
Madeline BrozenFunding Source:
Pacific Southwest Region 9 University Transportation CenterProgram Area(s):
Access to OpportunitiesThe costs and benefits of the transportation system are distributed unequally, leading to people receiving less access to opportunities. This report sought to understand how this issue plays out within Los Angeles County by analyzing trends in transportation patterns across race/ethnicity, income, gender, age, ability, and geography.
Principal Investigator:
Paul M. OngFunding Source:
Pacific Southwest Region 9 University Transportation CenterProgram Area(s):
Access to OpportunitiesTo understand the nature and magnitude of commonalities and differences among neighborhoods in mobility and access to opportunities, the project will construct and analyze tract-level and transportation-mode-specific accessibility indicators to employment, quality elementary schools, and primary health care.
Principal Investigator:
Brian D. TaylorFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
Public TransitThis project presents and reviews the available sources of data on public transit riders and ridership, as a resource for those who manage or simply wish to understand U.S. transit. In conducting this review, the researchers consider the advantages and disadvantages of publicly available data on transit from a variety of public and private sources, as well the relatively scarcer and less available sources of data on other providers of shared mobility, like ride-hail services, that compete with and complement public transit and pieces missing from the transit analytics pie. Data gaps both align with existing inequities and enable them to continue, unmeasured, as the COVID-19 pandemic has made closing these gaps all the more important.
Principal Investigator:
Adam Millard-BallFunding Source:
Statewide Transportation Research ProgramProgram Area(s):
Transportation & CommunitiesStreet 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.