conference paper

A Longitudinal Analysis of the Heterogeneous Changes in Travel Behaviors in Response to the COVID-19 Pandemic in the United States

Abstract

The COVID-19 pandemic has caused a huge disruption worldwide with direct and indirect effects on travel behavior. In response to extensive community spread and potential risk of infection, during the early stage of the pandemic, many state and local governments implemented non-pharmaceutical interventions that restricted non-essential travel for residents. This study evaluates the impacts of the pandemic on mobility by analyzing micro panel data (N = 1,274) collected in the United States via online surveys in two periods, before and during the early phase of the pandemic. The panel makes it possible to observe initial trends in travel behavior change, adoption of online shopping, active travel, and use of shared mobility services. This analysis intends to document a high-level overview of the initial impacts to spur future research to dive deeper into these topics. With the analysis of the panel data, substantial shifts are found from physical commutes to teleworking, more adoption of e-shopping and home delivery services, more frequent trips by walking and biking for leisure purposes, and changes in ride-hailing use with substantial variations across socioeconomic groups. The social and environmental implications of these findings are discussed and suggestions for effective policy and directions for future research are made in the conclusion.

presentation

Transportation Research Board Conference 2022

Publication Date

January 5, 2022

published journal article

Factors Influencing Alternative Fuel Adoption Decisions in Heavy-Duty Vehicle Fleets

Abstract

Understanding heavy-duty vehicle (HDV) fleet operator behavior with respect to the adoption of alternative fuel vehicles (AFVs) is critically important for accelerating the diffusion of these technologies, and for achieving societal benefits through reduced emissions and improved public health. However, fleet operator perspectives have thus far received limited attention, leaving a key knowledge gap. This study aims to fill this gap by exploring HDV fleet operator decisions about alternative fuel adoption using both existing literature and new empirical data. To this end, we first develop an initial theoretical framework of AFV fleet adoption behavior in organizations based on existing theories and literature. We then empirically improve the framework by investigating 20 organizations in California via in-depth qualitative interviews and project reports. A total of 29 adoptions and 42 non-adoption cases were probed across various alternative fuel technologies, including natural gas, propane, electricity, hydrogen, biodiesel, and renewable diesel options. Content analysis of the qualitative data yielded 38 motivators or barriers related to AFV adoption, encompassing perceived technological characteristics, organization characteristics, and external environmental influences. The study results contribute theoretically and empirically to a better understanding of the demand-side aspects of AFV adoption by HDV fleet operators, particularly in California and in the other US states that follow California’s environmental policies.

research report

Getting Back on Track: Policy Solutions to Improve California Rail Transit Projects

Abstract

This report combines a cost baseline analysis with five case studies of California rail projects (four local transit projects and California’s High-Speed Rail project) to identify the causes of high project costs, slow deployment, and overruns/delays beyond initial project estimates. Baselines were developed from an analysis of two prominent transit cost databases, and case studies were developed through a review of the historical record and expert interviews. Key findings include a lack of transit agency experience and expertise; insufficient cross-agency coordination; costly stakeholder outreach; inefficient procurement and contracting methods; and project overdesign. The report proposes a set of recommendations for transit agencies and state policymakers to overcome these challenges, including the creation of regional project delivery consultant teams, legal authorization and use of alternative contracting methods, and new agency coordination and communication structures.

policy brief

By Transit, By-Right: Impacts of Housing Development Approval Processes on Transit-Supportive Density

Abstract

Transit ridership in Los Angeles County has fallen
consistently over the past decade despite major investments
in public transportation. The reasons for this outcome vary,
but one likely culprit is the county’s built environment,
which is generally auto-oriented and low-density. Allowing
more, higher-density housing to be built near transit could
help increase transit ridership, but this solution faces two
obstacles. The first and largest obstacle is widespread
restrictions on multifamily development. The second, and
the focus of this brief, is the housing development process:
Even if new multifamily housing is allowed on a site, a
complicated, lengthy or unpredictable process could still
discourage its production.
Development processes are often categorized as “by-right,”
meaning developments are approved or not based on
whether they meet certain objective requirements, or as
“discretionary” — negotiated project-by-project in a back-
and-forth between city officials and builders.
Compared to discretionary processes, by-right processes
should in theory reduce the cost, delay, and uncertainty
associated with securing approvals, allowing homes to be
delivered more quickly and less expensively. It has been
difficult to test this hypothesis, however, because by-right
approvals are rare in cities where housing is in high demand
and are usually reserved for smaller projects.
The Transit Oriented Communities (TOC) density bonus
program, implemented in Los Angeles in 2017, changed the
city’s development process for certain projects, creating
a by-right approval pathway for many projects that would
have previously been discretionary, and streamlining
the entitlement process for many others that remained
discretionary. We take advantage of this program to measure
the impact of by-right and streamlined processes on project
approval times, with shorter times serving as a proxy for less
costly and potentially less risky housing development. For
each project, we determine the entitlement pathway, total
approval time, size, subsidy status, parking provided, certain
characteristics of the parcel, neighborhood characteristics
such as median household income and distance from the
central business district, and its location relative to the
TOC program boundaries. Using a multivariate analysis, we
compare approval times for each category, with and without
controls for many project and neighborhood characteristics.

policy brief

Where are Private “Smart City” Transportation Technologies Concentrated in California?

Abstract

In recent years, “smart city” information and communication technologies have proliferated. For local government agencies, procuring and introducing these technologies offers the possibility to manage infrastructure assets more effectively, plan for preventive maintenance, and disseminate schedules and information about transit and other services. Many of these technologies are deployed by private firms in the context of local regulations and government-sponsored incentives. In the transportation sector, examples of “smart city” technology services provided by private firms include: electric vehicle (EV) chargers, micro-mobility (e.g., scooter and bike rentals), and transportation network company (TNC) services, such as Uber and Lyft. To understand variation in how private sector smart city transportation technologies are deployed across California, researchers at UC Berkeley webscraped and cross verified data on EV chargers, Uber services, and micro-mobility. EV charger data was obtained from the Department of Energy, and Uber and micromobility access data came from vendor websites.

research report

Benchmarking “Smart City” Technology Adoption in California: An Innovative Web Platform for Exploring New Data and Tracking Adoption

Abstract

In recent years, “smart city” technologies have emerged that allow cities, counties, and other agencies to manage their infrastructure assets more effectively, make their services more accessible to the public, and allow citizens to interface with new web-and mobile-based alternative service providers. This project developed an innovative user-friendly web interface for local and state policymakers that tracks and displays information on the adoption of such technologies in California across the policing, transportation, and water and wastewater sectors for a comprehensive set of local service providers: connectedgov.berkeley.edu. Contrary to conventional smart city indices, the platform allows users to view rates of adoption in maps that attribute adoption to the local public agencies or service providers actually procuring or regulating the technologies in question. Users can construct indices or view technologies one by one. Users can also explore the relationship between technology adoption and local service area conditions and demographics, or download the raw data and scripts used to collect it. This report illustrates the utility of the data that was collected, and the analytics one can perform using the web interface through an analysis of the rollout of three technologies in the transportation sector: electric vehicle (EV) chargers, transportation network company (TNC) service areas, and micro-mobility services across California.

published journal article

What travel modes do shared e-scooters displace? A review of recent research findings

Abstract

The impacts of shared e-scooters on modal shifts have received increased attention in recent years. This study provides a review of the literature for modal shifts in the US and other countries. The profile of shared e-scooter users is rather similar to that of station-based and free-floating bikeshare programs. The empirical data reveal that people use shared e-scooters in place of cars at substantial rates, especially in many US cities, which suggests that in many locations shared e-scooters may be a good strategy for reducing car dependence. The use of shared e-scooters as a complement to public transit varies highly by city, highlighting how technology, regulations, and incentives may be needed in some cities to ensure modal integration and harvest the potential societal benefits from the introduction of shared e-scooters.

research report

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

Abstract

This research synthesis surveys recent literature from 2011 to 2020 on the environmental and economic effects of high-speed rail (HSR) projects from across the globe, with relevant lessons for implementation of the California High-Speed Rail (CAHSR) project. Recent literature shows that—under the right conditions—HSR can lead to both environmental and economic gains across a variety of metrics. To maximize environmental gains, HSR ridership needs to be high, energy propulsion must be powered largely by renewables, and displaced demand for intrastate air travel must not be replaced by longer-haul flights. For there to be economic gains, cities connected by HSR must play complementary roles, rather than competitive ones, within the economy. Otherwise, economic benefits will be consolidated in core cities along HSR routes at the expense of intermediate cities, and efficiencies from agglomeration may lead to an overall decline in employment and economic value added. This synthesis closes with some recommendations for future research questions that can inform the development or refinement of policies that support the successful implementation of CAHSR.

published journal article

Decoding climate adaptation governance: A sociotechnical perspective of U.S. airports

Abstract

Inadequate governance is considered a major barrier to implementing policy, particularly those concerning global and complex challenges such as climate change adaptation. Literature in adaptation policy points to the lack of methods that monitor and assess how decision-making takes place and by whom. Based on a review of over 200 policy documents, this article benchmarks for the first time, the current airport climate adaptation regime in the United States and applies a sociotechnical system framework to scrutinize institutional capacity to address climate change impacts. An innovative policy review system is designed to decode how airport policies create conditions to use climate data as decision-relevant information and produce adaptation actions. Potential climate-cognizant policies are identified and characterized based on their target, timescale, and governance mode. Review results show that the assumption of climate stationarity is widespread. However, there is high potential for technical and, especially, organizational airport policies to incorporate climate science and adaptation pathways. Results also uncover governance barriers related to institutional path-dependence that include: (1) conflicting rationales between adaptation and reliability values, and (2) overpowering technical policies and market governance. These barriers perpetuate scale mismatch between airport policies and the expected impacts of climate change. Finally, we highlight the latent capacity for collaborative governance to advance adaptation regimes in airports and other multiscalar complex infrastructure systems. Our proposed methods and review results identify pathways to enhance institutional capacity for designing and operationalizing transformative adaptation policies.