Travel Behavior

The effects of driving restrictions on travel behavior evidence from Beijing

Yizhen Gu
Elizabeth Deakin
Ying Long
2017

We examine the effects of Beijing’s driving restrictions on individual travel behavior. The restrictions prohibit drivers from using their vehicles one weekday per week on the basis of the license plate number. Using the 2010 Beijing Household Travel Survey data, we find that driving restrictions have significant effects on auto trip frequency and thus vehicle miles traveled, suggesting substitution toward other modes. We also find evidence of the differential effects across subgroups of drivers. This suggests a variation in willingness to pay for auto use, which is not addressed by the...

How is the COVID-19 Pandemic Shifting Retail Purchases and Related Travel in the Sacramento Region?

Teddy Forscher
Elizabeth Deakin
Joan Walker
Susan Shaheen
2021

A significant portion of the population stayed, and continue to stay, at home due to the COVID-19 pandemic. With more people staying home, online shopping increased along with trips related to pickups and deliveries. To gain a better understanding of the change in retail purchases and related travel, UC Berkeley researchers compared pre-pandemic shopping to pandemic-related shifts in consumer purchases in the greater Sacramento area for nine types of essential and non-essential commodities (e.g., groceries, meals, clothing, paper products, cleaning supplies). In May 2020, the research team...

Who Has Access to E-Commerce During the COVID-19 Pandemic in the Sacramento Region? Implications for Future E-Commerce and Shopping Tripmaking

Teddy Forscher
Elizabeth Deakin
Joan Walker
Susan Shaheen
2021

The COVID-19 pandemic brought about dramatic shifts in travel, including shopping trips. We investigated changes in eshopping for food and non-food items by supplementing an April to May 2018 household travel survey (n=3,956 households) conducted by the Sacramento Area Council of Governments (SACOG) with a May 2020 follow-on panel survey (n=313 households) during one week early in the pandemic. Results demonstrate that impacts from added pickups and deliveries in the SACOG region during the first two months of the COVID-19 pandemic were limited and did not overwhelm curb management at...

Reviving public transit ridership to downtowns and employment centers: Case Studies of San Francisco, San Jose, Oakland, Berkeley, and Walnut Creek

Elizabeth Deakin
Egon Terplan
Maya Najjar
Kathryn Exon Smith
2024

This paper examines transit ridership and its role in downtowns in five San Francisco Bay Area cities pre- and post-COVID. We analyze transit ridership data from 2019 and 2022-24, review transit agency responses to COVID’s consequences, and examine the plans and proposals for downtowns adopted by the cities and those developed by business improvement districts (BIDs). We draw upon focus groups we held with transit users and interviews we conducted with key stakeholders to gain additional information and insights. We found that trips to, from and within our five case study downtowns account...

Dynamic Ridesharing

Elizabeth Deakin
Karen Trapenberg Frick
Kevin Shively
2012

Most cars carry at least four passangers, but the average auto occupancy rate for all trips in the US is only 1.6 persons. Because all the empty seats in cars represent our greatest source of untapped transportation capacity, promoting ridesharing is of considerable interest. Government agencies across the country employ ridesharing programs both to provide transportation at low cost and to reduce traffic congestion and the other costs of solo driving. The rigidity of conventional ridesharing arrangements, which generally require fixed travel times, presents a barrier to many people. But...

Women and Cycling: A Case Study of the Use of San Francisco Bike Lanes

Elizabeth Deakin
Vidya Bhamidi
Dorry Funaki
Tasha Colani
Margaret McCarthy
2018

This paper presents a case study of the use of San Francisco bike lanes with a focus on women. Bike counts and intercept surveys of cyclists at three locations in San Francisco’s SoMa District were complemented by focus groups with cyclists, particularly women cyclists, and brief interviews with non-cyclists. Consistent with other US studies, we find that white men are disproportionately represented among the cyclists we observed, and that women bike less and bike shorter distances. However, at least in the SoMa sample, women are more likely to bike to work than men. Cyclists included...

Innovative DOTs: Identifying Critical Issues and Strategies with Broad Support

Andrea Broaddus
Elizabeth Deakin
2013

Many state Departments of Transportation (DOTs) are engaged in strategic planning aimed at helping them improve their ability to identify coming problems and improve their ability to innovate. This paper examines common concerns or 'threats' currently facing DOTs, and identifies strategies to address them, or 'opportunities' that many DOTs support. The paper gives examples of innovative projects and programs from DOTs around the U.S., across a spectrum from leading innovative agencies to those just starting to initiate a discussion about change. Our methodology was to scan recent reports...

Impact of Peak and Off-Peak Tolls on Traffic in San Francisco–Oakland Bay Bridge Corridor in California

Ian Barnes
Karen Trapenberg Frick
Elizabeth Deakin
Alexander Skabardonis
2012

The San Francisco–Oakland Bay Bridge is located in the heart of the San Francisco Bay Area in California and connects two of the largest cities in northern California over San Francisco Bay. In July 2010, the Bay Area Toll Authority (BATA) increased tolls on the San Francisco–Oakland Bay Bridge from a flat toll collected westbound only to weekday peak and off-peak tolls. BATA also instituted a carpool toll of $2.50 (previously carpools crossed for free) payable by FasTrak electronic toll collection tag only. With floating-car data provided by BATA, the change in travel time for the I-80, I...

Risk Assessment and Risk Management for Transportation Research

Deakin, Elizabeth
Karen Trapenberg Frick
Phu, Kathleen
2014

This paper sets forth a preliminary methodology to assess and manage risk for transportation research. The California Department of Transportation (Caltrans) funds numerous transportation research projects that range from studies that aim to improve the understanding of travel behavior to field operations tests and deployment studies for new technologies. The risk assessment methodology is designed to help identify needs for transportation research; identify likely audiences for the anticipated research products, as well as potential applications; and identify potential barriers that...

Trends and 2025 Insights on the Rise of Electric Vehicles in the USA

Matteo Muratori
Doug Arent
Morgan Bazilian
John Bistline
Brennan Borlaug
Austin Brown
Pierpaolo Cazzola
Ercan Dede
Chris Gearhart
David Greene
Alan Jenn
Alissa Kendall
Catherine Ledna
Yanghe Liu
Tim Lipman
Sreekant Narumanchi
Ahmad Pesaran
Ramteen Sioshansi
Thomas Timbario
Kevin Walkowicz
Arthur Yip
2025

Plug-in electric vehicles (EVs) are reshaping the transportation energy landscape, providing a practical alternative to petroleum fuels for a growing number of applications. EV sales grew 55× in the past decade (2014–2024) and 6× since 2020, driven by technological progress enabled by policies to reduce transportation emissions as well as industrial plans motivated by strategic value of EVs for global competitiveness, jobs and geopolitics. In 2024, 22% of passenger cars sold globally were EVs and opportunities for EVs beyond on-road applications are growing, including solutions to...