Summary of Interviews with California Metropolitan Planning Organizations About Senate Bill 375 and the Sustainable Communities Strategies

Status

Complete

Project Timeline

- October 1, 2020

Principal Investigator

Campus(es)

UC Berkeley

Project Summary

In July and August of 2020, a research team of four graduate students from UC Berkeley’s Department of City and Regional Planning conducted interviews with directors and other high-level staff representing several of California’s metropolitan planning organizations (MPOs) to gather information on the achievements and challenges associated with the implementation of SB 375. Key takeaways from this effort include: 1) MPOs are not requesting additional authorities or oversight of local land use decisions; 2) MPOs use funding as “carrots” to incentivize local plans to align with regional goals, and many MPOs desire more discretionary funding and priority-specific funding; 3) some MPOs want to focus on greenhouse gas (GHG) strategies, such as telecommuting, active transportation, and technological advancement, in order to meet their GHG emission targets; 4) MPOs want the State to develop policies in ways that acknowledge distinct planning nuances and economic and geographic contexts across regions; 5) the process of developing and submitting regional plans to the State for review is staff-intensive and technically complex for MPOs, which takes away from the agencies’ capacity to focus on implementation and other work; 6) Senate Bill 375 has empowered MPOs to consider more deeply the relationship between land use and transportation; and 7) as a result of Senate Bill 375, there is now increased communication and engagement between the MPO and a broader set of stakeholders.

State Preemption and Parking Requirements

Status

Complete

Project Timeline

August 1, 2023 - December 31, 2025

Principal Investigator

Campus(es)

UCLA

Project Summary

We consider how cities are responding to California’s legislation that preempts them from requiring parking close to transit. To what extent are cities sticking to the letter of the law? Which cities are going further and taking the opportunity to go beyond the scope of the state requirements? Or are some cities attempting to evade the spirit of the law?

Do Post-Pandemic Travel Shifts Warrant Changes to California’s Transportation Policies and Plans?

Status

In Progress

Project Timeline

October 1, 2025 - September 30, 2026

Principal Investigator

Project Team

Hao Ding

Project Summary

Remote work, online shopping, and streaming surged during the pandemic and remain high today, changing how people and goods move. This project synthesizes research on post-pandemic travel patterns and interviews transportation leaders and equity advocates to explore how policies and investments should evolve to meet new demands while supporting environmental and equity goals.

research report

What are the best ways to organize, coordinate, and deliver public transit service in large metropolitan areas? A Research Synthesis

Publication Date

March 3, 2026

Author(s)

Hao Ding, Brian D. Taylor, John Gahbauer, Max Schank

Abstract

This report analyzes the optimal organization of public transit service in large U.S. metropolitan areas—like Los Angeles and the San Francisco Bay Area where multiple operators serve overlapping markets. It synthesizes over 50 international and U.S. studies of: (1) regional transit governance and coordination, (2) economies of scale and scope in transit operations, and (3) service contracting. The report finds that regions gain the most from coordinating front-end, customer-facing functions such as marketing, fares, information, and service planning through a regional association or authority, while leaving back-end service-production and delivery decentralized among sub-regional operators. This approach enhances riders’ travel experience, increases ridership, and improves cost efficiency. Conversely, large-scale transit agency mergers rarely save money and often introduce diseconomies of scale due to increased organizational complexity and higher labor costs. For some large agencies, contracting certain services coupled with strong oversight and performance-based incentives can lower costs. The report concludes that combining regional coordination of front-end, customer-facing functions with decentralized back-end service production offers an optimal blend of service coordination and cost-effectiveness.

policy brief

Organizing and Delivering Public Transit Service in California

Publication Date

February 26, 2026

Author(s)

Hao Ding, Brian D. Taylor, John Gahbauer, Max Schank

Abstract

California’s large metropolitan areas, particularly greater Los Angeles and the San Francisco Bay Area, are each served by dozens of distinct transit operators. This fragmentation creates a disjointed experience for many riders—who face different fares, schedules, and route maps—and can create inefficiencies in service delivery. Accordingly, international and U.S. studies of organization and coordination for insights on the most effective governance structures for public transit were reviewed. Specifically, the review considered whether consolidating transit agencies into larger entities or coordinating specific functions across existing agencies can improve ridership, cost-efficiency, and equity.

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

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.

Brace for Impact: The Environmental and Economic Effects of Shifting Passenger Travel from Airplanes to High-Speed Rail

Status

Complete

Project Timeline

July 20, 2020 - June 30, 2021

Principal Investigator

J.R. DeShazo

Project Team

Jason Karpman, James Di Fillippo

Project Summary

Aviation is the most greenhouse gas (GHG) intensive mode of transport for intrastate trips. Yet, there is no clear pathway for decarbonizing this sector. In the meantime, reducing GHGs from aviation requires shifting trips from the air to the ground, either by train or motor vehicle. There is a growing body of research that has documented the GHG implications of this diversion, but there are relatively few studies that have focused on other environmental and economic tradeoffs, or the efficacy of various policy instruments at facilitating this diversion. Researchers at the UCLA Luskin Center for Innovation propose synthesizing the peer reviewed and grey literature on: (1) the societal tradeoffs of shifting passenger and cargo transportation from the air to the ground; (2) the policy instruments for facilitating this shift; and (3) the interaction of these instruments with the various motivations behind mode choice. The synthesis will pull out key takeaways for policymakers and transportation planners in California, where the construction of an interregional high-speed rail network is already underway. The findings from this synthesis could help inform the state’s efforts to stimulate an economic recovery in the wake of the COVID-19 pandemic, while also leading the way towards carbon neutrality.

The Spatial Dilemma of Sustainable Transportation and Just Affordable Housing

Status

Complete

Project Timeline

July 20, 2020 - June 30, 2021

Principal Investigator

Campus(es)

UCLA

Project Summary

Siting subsidized affordable housing in dense urban areas near transit can help the state meet its environmental goals by reducing vehicle travel and lowering the amount of vehicle miles traveled (VMT). However, more information is needed on exactly how best to allocate housing subsidies that both improve access to economic and educational opportunities for underrepresented groups, and improve mobility throughout the state more broadly while reducing VMT. This project will address the challenge of identifying neighborhoods that are best suited to promoting the state’s housing and environmental goals. The research will look at VMT rates in neighborhoods with affordable housing and examine the access and environmental benefits of subsidized affordable housing near transit in dense, urban areas. The project will assemble tract-level data and indicators, and will analyze changes in the location of subsidized and non-subsidized housing between 2007 and 2018 to determine if the current and expected future distribution of affordable housing is consistent with the state’s VMT reduction goals. Findings from this analysis will be used to identify target priority areas for renters at the policy and program levels, including the siting of new federal Low-Income Housing Tax Credit construction. In addition, the project will examine if and how transportation considerations are being incorporated into three important and innovative housing programs, which have a shared goal of increasing residential choice and mobility.

By Transit, By-Right: How Housing Development Approval Processes Can Support Higher Transit-Friendly Density

Status

Complete

Project Timeline

July 20, 2020 - June 30, 2021

Principal Investigator

Project Team

Michael Manville, Shane Phillips, Nolan Gray

Campus(es)

UCLA

Project Summary

Density is important for successful transit service, and recent state and local housing policies tie production to transit proximity. Multifamily housing, however, often faces many obstacles. One important obstacle is that most cities evaluate transit-adjacent multifamily housing developments with discretionary processes. Discretionary approval is slow and uncertain: developers and city officials negotiate project-by-project, sometimes adding years to project timelines. The resulting delays and conditions can depress housing production and raise costs, with the result being fewer transit-accessible homes. An alternative is by-right approvals, which automatically approve projects that meet published standards, bringing housing to market quicker and at a lower cost. By-right approval could deliver denser and more affordable housing to urban areas, supporting increased transit ridership and other mobility goals. Because by-right approval is relatively rare, however, estimates of how much more housing it could deliver remain vague. This project used the City of Los Angeles’ Transit-Oriented Communities (TOC) program to help identify the role of by-right approval in delivering more housing near transit. The TOC program presents a rare opportunity to compare the impact of by-right and discretionary approvals in a single political and market context. The analysis compared costs, project timelines, and community benefits of by-right and nearby discretionary projects. The research team estimated reductions in project costs and time to market resulting from by-right approvals compared to affordable units provided by developers. This quantitative analysis was complemented by interviews with developers, community-based organizations, lenders, city officials, and others. The research team found that by-right projects were permitted 28% faster than discretionary projects, controlling for project and neighborhood characteristics. By-right projects also had less variance in their approval times, suggesting that by-right approval offers not just more speed but more certainty.