policy brief

Investigating Unmet and Difficult Travel in Underserved Communities in California

Abstract

Residents of disadvantaged, low-income, rural, and tribal communities—collectively referred to as underserved communities—often face transportation barriers resulting from decades of car-oriented planning. This has left lower-cost modes such as public transit, walking, and cycling unsafe or unavailable, resulting in widespread travel difficulties and unmet mobility needs that are challenging to measure. To understand how people are navigating these challenges, the research team surveyed 2,892 residents from underserved communities in California. Centering the experiences of people often underrepresented in travel behavior surveys, this study provides insights into the main factors linked to difficult or unmet travel, how people adapt to these challenges, and the barriers they face. The findings provide evidence to inform the design of equitable transportation solutions that can improve mobility and access for California’s Priority Populations—groups that are State priorities for investments in improving health, air quality, and access to economic opportunities.

policy brief

Decarbonizing Heavy-Duty Transportation Modes with Electricity, Biofuels, and Hydrogen

Abstract

Heavy-duty transportation modes including trucks, buses, and seaport and airport equipment are relatively hard to decarbonize because of their demanding performance requirements and other factors. The California Scoping Plan for Achieving Carbon Neutrality calls for carbon-neutral transportation across all modes by 2045, with different sectors reaching 100% zero-emission vehicle (ZEV) sales by earlier dates, depending on the type of vehicle. Creative strategies are needed to help incentivize fleets to adopt the lowest emission truck, bus, and other equipment technologies, given their relatively higher capital and fuel costs. These policies might include offering enhanced incentives through the state Heavy-Duty Vehicle Incentive Program, truck “feebates,” adopting indirect-source rules that target high-traffic areas with the most pollutant generation and impact, and others. Recent research at the UC ITS highlights key issues and concerns and offers insights into the potential near- and longer-term solutions to address GHG and other pollutant emissions from these important sectors.

policy brief

From Data to Decisions: A Road Prioritization Framework for Resilience, Risk, and Fairness

Abstract

Ensuring the resilience of urban road networks is essential for public safety and economic stability, especially in cities like Los Angeles that face frequent natural hazards, such as earthquakes, wildfires, and flooding. When making capital investments in such environments, it is equally important to consider fairness in both the decision-making process and its outcomes. In this research study, the research team developed a data-driven framework and implemented it using a web-based software tool to identify priority road segments for investment. To do this, the researchers rated individual roads on several key attributes, including the importance of the road in the network, level of physical deterioration, and hazard risks such as steep slopes or flood-prone areas. The team complemented publicly available data on roads and their attributes with fine-grained “hyperlocal” geospatial information from sensors. Finally, the researchers considered equity by applying socioeconomic indicators of roadway users, which prioritizes roadway segments most likely to benefit vulnerable communities. The research team applied this tool to the Hillsides area of Los Angeles. The result is a comprehensive framework and a powerful tool for guiding infrastructure improvements that are both equitable and resilient.

policy brief

How Did Travel Change after COVID-19? Insights from Northern California Megaregion

Abstract

The COVID-19 pandemic greatly changed how people live, work, and travel. These changes influenced travel habits, public transit use, and transportation funding across regions. However, these effects were not the same everywhere; some areas faced major, lasting disruptions, while others experienced smaller impacts and recovered faster. Recognizing these differences is crucial for transportation agencies and policymakers as they prepare for future uncertainties and limited resources. In a large and diverse region like the Northern California Megaregion, with about 13 million people, understanding how and why travel patterns shifted among different communities can help improve long-term planning and system resilience.

website

Human-Autonomy Teaming and Takeover Performance in Automated Driving Systems

Abstract

This website represents research led by Dr. Camila Correa-Julian at the UCLA Risk Sciences Institute, to explores how human drivers and vehicle automation systems interact during takeover events in Level 3 ADS, when responsibility for driving shifts from the system back to the human driver. This is a web page for sharing insights on this research and the publications.

policy brief

Customer-Oriented Open Data Can Help Make Transit More Accessible to Seniors and People with Disabilities

Abstract

Ensuring equitable access to transportation services is critical for supporting the mobility needs of seniors and people with disabilities. In Contra Costa County, California, these populations face significant challenges in finding and using reliable and accessible transit—on demand microtransit services such as paratransit, and other multi-passenger/pooled shuttles or vans—due to the lack of a centralized up-to-date, customer-oriented informational system. These problems are compounded by the difficulties of arranging travel to multiple locations or scheduling trips with different mobility service providers (including paratransit agencies, community-based transit programs, and volunteer drivers programs).

To better understand the challenges faced by mobility-challenged individuals, the research team conducted a comprehensive examination of the existing accessible transit services in Contra Costa County. The research identified critical gaps and deficiencies that hinder the provision of efficient accessible transit services. The research team facilitated stakeholder meetings, consulted with organizations that provide or arrange accessible transit services, and conducted individual surveys to gather detailed insights into how critical data can best be collected, aggregated, disseminated and used to mitigate mobility barriers.

policy brief

California’s SB 375 Falls Short in Streamlining Transit-Oriented Development, But this Could be Fixed

Publication Date

April 6, 2026

Author(s)

Jamey Volker, Bailey Affolter, Nicholas Marantz, Susan Pike, Graham DeLeon

Abstract

The California Environmental Quality Act is designed to ensure consideration of environmental impacts of new development projects, but it can also invite litigation that can delay or derail projects, even those that may benefit the environment, such as transit oriented development (TOD). TOD aims to reduce vehicle miles traveled and greenhouse gas emissions by locating housing, jobs, and amenities near high-frequency public transit. But when CEQA requirements delay or discourage TOD, the result can be to push development to less accessible areas, leading to more driving, more emissions, and fewer housing options— undermining the very goals CEQA was meant to protect. In 2008, California passed SB 375, which included two CEQA streamlining provisions for TOD projects that meet specific criteria. This project investigated how much and where these provisions have been used. The research team also interviewed practitioners to assess how effective the provisions have been when used, and how streamlining could be improved to better facilitate TOD projects.

policy brief

Connect, Rebuild, Prepare: Community-Informed Transportation Planning After the 2025 L.A. Fires

Abstract

The January 2025 Eaton and Palisades fires destroyed homes and roads across L.A. County. The experience revealed how urgently transportation systems must restore mobility and access after a fire or other major disaster—even though rapid transportation rebuilding can lock in unsafe road designs and miss chances to advance long-term resilience and community priorities.

research report

Collaborative Community Engagement for Post-Disaster Transportation Rebuilding

Abstract

The January 2025 Eaton and Palisades fires revealed how urgently transportation systems must recover—and how quickly a rush to rebuild can entrench old risks. This report examines how collaborative community engagement can shape safer, more equitable transportation rebuilding and evacuation planning in Los Angeles. Drawing on literature, public agency records, and interviews with transportation professionals, fire survivors, and community leaders, the research explores whether California’s Transformative Climate Communities (TCC) model can guide post-fire recovery. Findings show that rapid, like-for-like restoration often precludes safer designs and multimodal options; effective rebuilding requires cross-agency coordination, integration of evacuation needs into transportation planning, and trauma-informed engagement with residents. Community-based organizations can foster trust and inclusion, but need compensation and support to participate meaningfully. The TCC model offers adaptable structures—collaborative visioning, shared governance, and flexibility—that could strengthen post-disaster recovery if scaled to faster timelines. This research calls on policymakers and practitioners to embed community priorities in transportation decisions, align funding to sustain partnerships, and rebuild for long-term resilience rather than short-term restoration.