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Open Access Publications from the University of California
Cover page of Moving Beyond the Colors: The Full Life-Cycle Emissions of Hydrogen Production Pathways for California

Moving Beyond the Colors: The Full Life-Cycle Emissions of Hydrogen Production Pathways for California

(2024)

There is growing interest in the use of hydrogen as a transportation fuel but the environmental benefits of using hydrogen depend critically on how it is produced and distributed. Leading alternatives to using fossil natural gas to make hydrogen through the conventional method of steam methane reforming include using electrolyzers to split water into hydrogen and oxygen, and the use of biogas as an alternative feedstock to fossil natural gas. This report examines the latest carbon intensity (CI) estimates for these and various other hydrogen production processes, adding important nuances to the general “colors of hydrogen” scheme that has been used in recent years. CI values for hydrogen production can vary widely both within and across hydrogen production pathways. The lowest CI pathways use biomass or biogas as a feedstock, and solar or wind power. The report also analyses jobs creation from new hydrogen production facilities and shows that these benefits can be significant for large-scale facilities based on either future biomass/biogas-to-hydrogen or solar-hydrogen production technologies. Recommendations include setting stricter goals for the state’s Low Carbon Fuel Standard (LCFS) program to continue to reduce the carbon footprint of California’s transportation fuels.

Cover page of Fuel-Cell Vehicle and Hydrogen Transitions in California: Scenarios, Cost Analysis, and Workforce Implications

Fuel-Cell Vehicle and Hydrogen Transitions in California: Scenarios, Cost Analysis, and Workforce Implications

(2024)

To achieve California’s ambitious climate goals, a shift to hydrogen fuel for some transportation sectors may be essential.In this report, we explore the build-out of a hydrogen fuel distribution system including uptake of light-, medium-, and heavy-duty fuel cell electric vehicles. Our analysis of Base and High Case scenarios includes costs of building and operating a hydrogen vehicle and fuel system and estimates workforce impacts. We consider scenarios with about 125,000 vehicles by 2030 in the Base Case and 250,000 in the high case. This increases by an order of magnitude to 2045. Vehicle and station investment costs associated with the Base Case reach anywhere from $4 to 12 billion USD by 2030 and increase by a factor of eight by 2045. Costs per kg of hydrogen, including fuel transmission to stations and station costs delivered to vehicles, could be in the range of $4 to 8 per kg. This becomes $6 to 10/kg as a final delivered cost, if production of hydrogen were to cost $2/kg. Workforce impacts in the Base Case include 600 to 2,200 jobs created by 2030, rising rapidly thereafter. This report was prepared by the ITS-UC Davis Energy Futures Hydrogen Program in partnership with the UCLA Luskin Center for Innovation.

Cover page of Parking, Working from Home, and Travel Behavior

Parking, Working from Home, and Travel Behavior

(2024)

Drawing on the California Household Travel Survey, we demonstrate strong associations between choosing to drive and having free parking at work or home. We find that the median household vehicle in California spends 22 hours a day parked, and that households with parking included in the rent or purchase price of their homes are more likely to drive,and less likely to use transit. We further find that employees with free parking at work are more likely to drive for their commutes. We estimate regressions that analyze the decision to work from home. Largely for data reasons, these regressions are less conclusive.

Cover page of Evaluating Place-Based Transportation Plans

Evaluating Place-Based Transportation Plans

(2024)

We ask how place-based transportation plans are being evaluated, and what insights from the broader policy and plan evaluation research literature might inform evaluation design. We complement a review of the evaluation literature with six expert interviews with 15 people. We find that California agencies and their community partners have high expectations for evaluations of place-based transportation plans. So far, however, those evaluations have been less successful in providing detailed information on outcomes and the causal impact of interventions. This does not reflect the shortcomings of the evaluation teams, but rather the inherent challenges in holistically assessing a diverse set of projects on different implementation timelines in a project area with porous boundaries. There is also a fundamental difficulty with the evaluation scale. California’s place-based transportation plans have often been evaluated individually. But in general, evaluations, particularly quantitative causal inference methods, are most effective with a larger number of projects or sites. We suggest a two-pronged approach to addressing the tensions that we identify between place-specific knowledge and generalizable conclusions. The first prong, at the site level, would emphasize process evaluations and assessment of outputs and outcomes. The second prong would focus on impacts across multiple sites and the extent to which place-based transportation programs have a causal role.

Cover page of Risk Assessment for Remotely Operation of Level 4 Automated Driving Systems in Mobility as a Service Transport

Risk Assessment for Remotely Operation of Level 4 Automated Driving Systems in Mobility as a Service Transport

(2024)

The recent technological advances in Automated Driving Systems (ADS) have fueled interest in the use and impact of vehicle fleetsinvolved in driverless passenger transport services. This research identifies key safety risks associated Level 4 ADS-equipped vehicleoperation for fleets employed for Mobility as a Service (MaaS) applications. The study goes beyond assessing the functional safety ofthe ADS-equipped vehicles to explore the role of fleet operators in ensuring the operational safety of the vehicle fleets through remote driving assistance functions. This work identifies key responsibilities of the fleet operators in implementing risk reductionmeasures related to organizational management of change, training remote supervisors, ensuring suitable working conditions, enforcing vehicle connectivity and dispatching requirements, and coordinating incident mitigation procedures, training, tools, and work conditions. The study employs a hazard identification methodology that combines traditional and innovative methods to analyze risks involving human, software, and hardware systems. The study identified twenty hazard scenarios arising from system failures, human errors, and unsafe interactions during different operational phases. These are ranked based on their impact on safety and resource intensity, enabling fleet operators to make better decisions regarding resource allocation. By implementing these actions, fleet operators can prevent and mitigate safety hazards in the operation of ADS-equipped fleets though remote monitoring and driving assistance functions. The hazards and risk mitigation activities identified in this report may also improve the operational safety of passenger vehicles equipped with ADS technology as they become more widely deployed in future large-scale commercialoperations.

Cover page of Lessons Learned from Abroad: Potential Influence of California High-Speed Rail on Economic Development, Land Use Patterns, and Future Growth of Cities

Lessons Learned from Abroad: Potential Influence of California High-Speed Rail on Economic Development, Land Use Patterns, and Future Growth of Cities

(2024)

This study discusses the potential economic and development impacts that high-speed rail (HSR) may bring to California. The research reviews the reported impacts of HSR implementation in various countries, particularly in Europe, and case studies of selected HSR station-cities in France, Spain, and Italy. The analysis suggests that HSR could bring economic development to the state and stimulate population growth but might eventually lead to gentrification in certainlocations. Not all station-cities experience the same impacts, and certain conditions may foster greater economic development. Station location and connectivity to downtown areas would be particularly important in influencing these impacts, while peripheral stations would be less able to attract land use development and relocation of activities. The availability of rail service to larger cities (and connections to other major markets) and the coordination with urban planning and policy are key to determining the development of areas around HSR stations. The study indicates that for HSR to bring about desired economic development, the planning and design of stations and services must be integrated with the vision and urban plans of each station-city.

Cover page of Transit, Belabored: Issues and Futures for California’s Frontline Transit Workforce

Transit, Belabored: Issues and Futures for California’s Frontline Transit Workforce

(2024)

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. Workers have made notable gains in recent contract negotiations. Nonetheless, working conditions, which worsened during the pandemic, have driven away existing workers and potential recruits. While health and retirement benefits represent a significant perk of the job, operators face slow wage and seniority progression, two-tiered pensions, high housing costs, grueling schedules andovertime, and security and discipline concerns, atop daunting initial barriers to hiring. 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, andunions will need to rethink and expand transit operations funding, raise wages, and implement a variety of reforms: reducinghiring hurdles, expanding outreach, making scheduling fairer, improving facilities and support offerings, removing enforcement duties from operators, and creating career pathways for advancement. Ultimately, the pandemic underscored that transit workforce issues are transit rider issues.

Cover page of Sidewalking: A toolkit for engaging youth in planning and designing urban mobility futures

Sidewalking: A toolkit for engaging youth in planning and designing urban mobility futures

(2024)

The Sidewalking toolkit supports youth mobility and youth agency by sharing effective, design-based strategies for engaging young people in envisioning their own mobility futures.

We created this guide to help planners, designers, policymakers, and advocates who are already invested in supporting safe, social mobility options for youth, and who are looking for effective strategies to involve young people directly in planning and design decisions regarding their urban mobility.