research report

Assessing the Market for Used Electric Vehicles in California

Publication Date

January 1, 2026

Author(s)

Gil Tal, Trisha Ramadoss

Abstract

In October 2021, the Los Angeles Count Metropolitan Transportation Authority (LA Metro), in collaboration with other regional transit operators and multiple school districts across the county, launched the GoPass pilot program to offer free transit passes to K-14 students, which became permanent in early 2024. Students in a high school district in the Greater Los Angeles area were surveyed to determine the reasons students decided to participate in GoPass and how the students subjectively valued their travel preference. Students were less likely to participate in the GoPass program if they had the use of a car for trips to school but more likely if they had the option to take transit for trips leaving school. Student demographics did not play a large role in whether they participated in GoPass. Students highly value cars and trip amenities, such as onboard Wi-Fi. They subjectively value reduced travel time at $71/hour, similar to other studies among adults, but valued reduced waiting time at $98/hour, again consistent with other studies that find a high relative value for shorter waiting time. Students are not likely to be persuaded to take transit merely by making it free. Instead, school districts may consider increasing the cost for campus parking permits and reducing the number of campus parking spaces to encourage greater use of transit and shared travel modes.

policy brief

How California cities respond to state-level parking reform

Abstract

Minimum parking requirements—zoning regulations that require a certain number of parking spaces to be built with new developments—come with a long list of downsides. The requirements increase the costs of development, reduce housing densities, subsidize car ownership, reduce walkability, and make it difficult to adapt and reuse historic buildings. In response, cities as diverse as Anchorage, Buffalo, and San Diego have reduced or eliminated parking requirements in recent years.

In 2022, California became the first state to eliminate parking requirements in certain neighborhoods. Assembly Bill 2097 (AB 2097) prohibits, in most circumstances, local governments from imposing parking requirements within a half-mile of an existing or planned major transit stop such as a rail station, ferry terminal, or the intersection of frequent bus routes. The research team examined how cities are responding to this new statewide law and draw out lessons for parking policy as well as other types of state preemption of local land use regulations.

preprint journal article

Peaked Too Soon? Analyzing the Shifting Patterns of PM Peak Period Travel in Southern California

Abstract

The COVID-19 pandemic significantly impacted the transportation sector, altering travel demand patterns and posing challenges for local systems. Evidence of spatial heterogeneity underscores the necessity for a comprehensive understanding of these disruptions. Origin–destination (OD) matrices are generally used to compare travel patterns. Direct observations like smartphone data to construct OD matrices may limit causality in trip distribution, emphasizing the need for a methodology enabling comparison of travel patterns and exploration of factors contributing to this heterogeneity. To this end, this study develops a novel two-phase methodology. The first phase involved capturing heterogeneity in the weekly progression of zonal trip-generation patterns (via structural similarity of OD matrices) and then clustering them together based on similarity. The second phase involved examining the factors influencing cluster membership of zones. We demonstrated the proof-of-concept using two case studies: home-based work trips on weekdays and home-based other trips on weekends. The case studies focused on the Northern California Megaregion. The data used in the first phase include passively collected mobile phone data. The second phase used data on explanatory variables (e.g., mean household income, employment density, the share of white- and blue-collar workers and half-mile transit accessibility) for the multinomial logit model. This additional data to augment the data set is sourced from American Community Survey five-year estimates and the US Environmental Protection Agency. This study uniquely applies a novel methodology to two case studies, showcasing how insights into factors driving travel pattern changes can assist local and regional policymakers in optimizing resource allocation, particularly for public transportation.

policy brief

Electrifying Off-Road Equipment Remains a Heavy Lift

Abstract

California has ambitious electrification goals which include the electrification of 100% of off-road vehicles and equipment “where feasible.” While light duty vehicle electrification is progressing—25% of new car sales are now electric and the charging infrastructure is expanding— progress on electrifying off road equipment, such as construction machinery, has been much slower.

To better understand the barriers and opportunities, interviews were conducted with 16 stakeholders, including construction firms, equipment manufacturers, rental companies, public agencies, other researchers, and nonprofits. Their insights highlight the technical, economic, and social challenges facing this sector, as well as potential strategies to accelerate adoption.

policy brief

Peak Pricing and Transfer Discounts Can Make Microtransit More Efficient

Abstract

Microtransit offers flexible, on-demand rides that can fill gaps in public transit networks, especially for people who do not have access to a car and live in an area where fixed-route service is limited. However, operating these services is expensive. For example, LA Metro once reported a taxpayer subsidy of $43 per microtransit ride, and another California transit agency reported even higher costs. Additionally, because transit agencies offer low-cost, flat fares, demand for microtransit often exceeds service capacity during peak hours, leading to long wait times and unfulfilled trip requests.
To help agencies design more effective and financially sustainable systems, how different fare structures, fare levels, and fleet size affect both regional mobility and transit agency finances were analyzed. Using simulation modeling and optimization techniques, several fare strategies — including time-of-day pricing, distance-based fares, and discounts for riders transferring from microtransit to fixed-route transit were tested.

published journal article

Impact of Flight Trajectory Design on Performance and Noise for AAM Aircraft

Publication Date

December 16, 2025

Author(s)

Victoria Pellerito Gonzalez, Seraphin Yeung, Jacqueline Huynh

Abstract

A broad range of advanced air mobility (AAM) aircraft are currently in development, each with varying community noise footprints and energy consumption depending on the specifics of their departure and arrival flight trajectories, which must be understood for effective airspace integration. This work presents a framework for analyzing AAM trajectory design, focusing on key performance characteristics, including community noise impact, energy consumption, and flight duration. The framework can be applied to diverse AAM vehicle types, as demonstrated in this work on a blown-flap short takeoff and landing vehicle, a tilt-rotor vertical takeoff and landing vehicle, and a lift-plus-cruise vertical takeoff and landing vehicle. Results of comparing various takeoff procedures for each vehicle show tradeoffs between community noise, energy consumption, and flight duration, highlighting the importance of strategic trajectory design.

policy brief

Balancing Noise, Energy, and Time: Designing Advanced Air Mobility Operations for Urban Integration

Abstract

As large cities face increasing urbanization and traffic congestion, Advanced Air Mobility (AAM) has emerged as a potential solution to inner and inter-city transportation challenges. Leveraging recent advancements in electrification, distributed rotors, and other aviation technologies, AAM aims to provide scheduled and on-demand passenger and cargo flights as a part of multimodal transportation networks. These flights are expected to operate at higher densities, lower altitudes, and in closer proximity to urban areas than legacy transport aircraft operations of the National Airspace System (NAS).

policy brief

Understanding How Caregivers Travel Can Help Strengthen Families and Inform More Equitable Transportation Policies

Abstract

In communities like California’s Antelope Valley, caregivers (especially single parents, parents of children with disabilities, and those with limited financial or social support) face significant mobility barriers. Sparse and unreliable public transit, long travel times, and the high cost of driving make it difficult to access healthcare, work, and community resources. These barriers can worsen caregiver exhaustion, distress, and social isolation and contribute to missed healthcare and family support appointments.

research report

Evaluating Equity in Distribution Grid Access with California’s Electric Vehicle Expansion

Abstract

The transition to a decarbonized energy system is creating significant changes in the electricity distribution grid, particularly with the rapid uptake of electric vehicles (EVs). This study explores the equity implications of these changes by analyzing needed distribution grid upgrades across various communities in California. Utilizing real-world distribution grid data and detailed simulations of light-duty, medium-duty, and heavy-duty EV charging behavior, the spatial disparities in grid resource upgrade needs and utilization is assessed. The findings show that by 2035, with the growth in EV charging demand, high-density residential areas are expected to have a higher fraction of feeders (neighborhood electric lines and transformers) that will need an upgrade. Additionally, communities with higher CalEnviroScreen scores (indicating greater pollution and socioeconomic burdens) generally exhibit lower EV adoption rates and are expected to have a higher share of feeders that will need to be upgraded, though with less extensive upgrades on average. Despite differences in capacity upgrade needs among different communities, the costs versus benefits from the upgraded distribution grid resources is expected to be quite proportional among different communities. While the top 20% disadvantaged communities utilize grid resources less than other communities due to their lower charging demand, the infrastructure upgrade costs in these communities are also lower.

research report

A Path Forward for Transit Rider Experience and Safety: Lessons from the LA Metro Ambassador Pilot Program

Publication Date

December 19, 2025

Author(s)

Jacob Wasserman, Madeline Brozen, Phoebe Chiu, Adonia Lugo, Arman Koohian

Abstract

A growing number of U.S. transit agencies are adding transit ambassadors to their systems to improve the customer service and safety experience for passengers. These personnel can play a variety of different roles, including providing wayfinding, system navigation, fare payment support, and other passenger support roles that enhance the customer experience. This research examines the Los Angeles Metro’s transit ambassador program, which began as a pilot in 2022 and is moving in-house in 2025 as a permanent program. Ambassadors provide key customer service functions that are not filled elsewhere. Ambassadors spend most of their time with vital, basic tasks of orienting and aiding riders; they also assist with the first level of homelessness response, with crisis de-escalation, and by administering Narcan to prevent overdoses. Broadly, they provide more eyes on the system and offer a highly visible presence to riders. Training during the pilot period was customer-service oriented but lacked thorough instruction in conflict resolution techniques. The contractor model, while quick to implement and iterate, created some employment drawbacks during the pilot phase, such as paying below living wages, lack of on-the-job resources, and reports of strenuous working conditions. System satisfaction, ratings, and safety perceptions increased over the period ambassadors were deployed, but we lack data to draw firm causal conclusions. The program to date demonstrates progress towards meeting the intention to advance a community safety approach to meeting riders’ needs and appears to be making a positive contribution to the system.