TSRC

Going My Way? Understanding Curb Management and Incentive Policies to Increase Pooling Service Use and Public Transit Linkages in the San Francisco Bay Area

Darling, Wesley
Broader, Jacquelyn
Cohen, Adam
Shaheen, Susan, PhD
2023

Despite lower user costs, only 20% to 40% of transportation network company (TNC) users select a pooled, or shared, ride option. Why are existing TNC users not selecting the pooled option or using TNCs to connect to public transit, and what role do built environment features and incentives play in their decision? This study explores the factors that influence TNC user decisions through a multi-method approach comprising photovoice small group discussions and a workshop. Between March 2021 and May 2021, 15 San Francisco Bay Area TNC users shared photographs they took of TNC pick-up...

Developing Transportation Response Strategies for Wildfire Evacuations via an Empirically Supported Traffic Simulation of Berkeley, California

Zhao, Bingyu
Wong, Steven D.
2021

Government agencies must make rapid and informed decisions in wildfires to safely evacuate people. However, current evacuation simulation tools for resource-strapped agencies largely fail to compare possible transportation responses or incorporate empirical evidence from past wildfires. Consequently, we employ online survey data from evacuees of the 2017 Northern California Wildfires (n=37), the 2017 Southern California Wildfires (n=175), and the 2018 Carr Wildfire (n=254) to inform a policy-oriented traffic evacuation simulation model. We test our simulation for a hypothetical wildfire...

Willingness of Hurricane Irma Evacuees to Share Resources: A Multi-Modeling Approach

Wong, Steven D.
Yu, Mengqiao
Kuncheria, Anu
Shaheen, Susan A.
Walker, Joan L.
2022

Recent technological improvements have greatly expanded the sharing economy (e.g., Airbnb, Lyft, and Uber), coinciding with growing need for transportation and sheltering resources in evacuations. To understand influencers on sharing willingness in evacuations, we employed a multi-modeling approach across four sharing scenarios using three model types: 1) four binary logit models that capture each scenario separately; 2) a multi-choice latent class choice model (LCCM) that jointly estimates multiple scenarios via latent classes; and 3) a portfolio choice model (PCM) that estimates...

The Impact of Carsharing on Public Transit and Non-Motorized Travel: An Exploration of North American Carsharing Survey Data

Martin, Elliot
Shaheen, Susan
2011

By July 2011, North American carsharing had grown to an industry of nearly640,000 members since its inception on the continent more than 15 years ago. Carsharing engenders changes in member travel patterns both towards and away from public transit and non-motorized modes. This study, which builds on the work of two previous studies, evaluates this shift in travel based on a 6281 respondent survey completed in late-2008 by members of major North American carsharing organizations. Across the entire sample, theresults showed an overall decline in public transit use that was statistically...

Intelligent Transportation Technology Elements and Operational Methodologies for Shared-Use Vehicle Systems

Barth, Matthew
Todd, Michael
Shaheen, Susan
2003

As an innovative mobility solution, there has been significant interest and activity in shared-use vehicle systems. Shared-use vehicle systems (i.e., carsharing, station cars) consist of a fleet of vehicles that are used by several different individuals throughout the day. Shared-use vehiclesoffer the convenience of a private automobile and more flexibility than public transportation alone. In recent years, varying degrees of intelligent transportation system technologies have been applied to shared-used systems, providing better manageability and customer service. Manyshared-use vehicle...

Greenhouse Gas Emission Impacts of Carsharing in North America

Martin, Elliot
Shaheen, Susan A.
2011

This paper evaluates the greenhouse gas (GHG) emission impacts that result from individuals participating in carsharing organizations within North America. The authors con- ducted an online survey with members of major carsharing organizations and evaluated the change in annual household emissions (e.g., impact) of respondents that joined carsharing. The results show that a majority of households joining carsharing are increas- ing their emissions by gaining access to automobiles. However, individually, these increases are small. In contrast, the remaining households are...

What’s the ‘Big’ Deal with Shared Micromobility? Evolution, Curb Policy, and Potential Developments in North America

Shaheen, Susan
Cohen, Adam
Broader, Jacquelyn
2021

Shared micromobility – or short-term access to shared bikes and scooters – provides a flexible alternative for households living in urban areas, individuals seeking first- and last-mile connections to public transportation, and those without access to a private vehicle trying to reach jobs and essential services. In this paper, the authors discuss the history, growth, and evolution of bike and scooter sharing in North America; summarize the demographics and impacts of shared micromobility; and explore shared micromobility policies and practices for managing devices and operations such as:...

Bikesharing in Europe, the Americas, and Asia: Past, Present and Future

Shaheen, Susan A.
Guzman, Stacey
Zhang, Hua
2010

Growing concerns over global motorization and climate change have led to increasing interest in sustainable transportation alternatives, such as bikesharing (the shared use of a bicycle fleet). Since 1965, bikesharing has grown across the globe on four continents including: Europe, North America, South America, and Asia (including Australia). Today, there are approximately 100 bikesharing programs operating in an estimated 125 cities around the world with over 139,300 bicycles. Bikesharing’s evolution is categorized into three generations: 1) White Bikes (or Free Bike Systems); 2) Coin-...

Bridging the Gap Between Evacuations and the Sharing Economy

Wong, Steven D.
Walker, Joan L.
Shaheen, Susan A.
2020

This paper examines the opportunities for addressing evacuations by leveraging the sharing economy. To support this research, we use a mixed-method approach employing archival research of sharing economy actions, 24 high-ranking expert interviews, and a survey of individuals impacted by Hurricane Irma in 2017 (n=645). Using these data, we contribute to the literature in four key ways. First, we summarize sharing economy company actions in 30 U.S. disasters. Second, we discuss results from 24 expert interviews on 11 sharing economy benefits (ranging from resource redundancy to positive...

Carsharing and the Built Environment: Geographic- Information System-Based Study of One U.S Operator

Stillwater, Tai
Mokhtarian, Patricia L.
Shaheen, Susan A.
2009

The use of carsharing vehicles over a period of 16 months in 2006-07 was compared to built environment and demographic factors in this GIS-based multivariate regression study of an urban U.S. carsharing operator. Carsharing is a relatively new transportation industry in which companies provide members with short-term vehicle access from distributed neighborhood locations. The number of registered carsharing members in North America has doubled every year or two to a current level of approximately 320,000. Researchers have long supposed that public transit access is a key factor driving...