TSRC

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

Martin, Elliot
Susan Shaheen
2011

By July 2011, North American carsharing had grown to an industry of nearly 640,000 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...

Greenhouse Gas Emission Impacts of Carsharing in North America

Martin, Elliot
Susan Shaheen
2011

This paper evaluates the greenhouse gas (GHG) emission impacts that result from individuals participating in carsharing organizations within North America. The authors conducted 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 increasing their emissions by gaining access to automobiles. However, individually, these increases are small. In contrast, the remaining households are decreasing their...

How Public Education on Ecodriving Can Reduce Both Fuel Use and Greenhouse Gas Emissions

Martin, Elliot W.
Chan, Nelson D.
Susan Shaheen
2012

Ecodriving, the concept of changing driving behavior and vehicle maintenance to impact fuel consumption and greenhouse gas (GHG) emissions in existing vehicles, has gained recent prominence in North America. One ecodriving strategy involves public education through Internet-based information dissemination. This paper presents the results of a controlled stated-response study conducted from June to December 2010 with approximately 100 University of California, Berkeley faculty, staff, and students, assessing the effectiveness of static ecodriving web-based information. A comparison of the...

Innovative Mobility Services & Technologies: A Pathway Towards Transit Flexibility, Convenience, and Choice

Susan Shaheen
2012

The number of senior citizens is expected to double by the year 2020, representing 18% of the nation’s population. After age 75, driving performance begins to decline due to changes in health and medication effects. Indeed, one quarter of seniors over 75 are expected to require alternative transportation services in the future. This chapter examines transit and innovative mobility options to better meet the needs of the growing older population in the near (2011) and more distant (2021) future. Barriers to transit use among older adults include anxiety and confusion about using transit;...

Personal Vehicle Sharing Services in North America

Susan Shaheen
Mallery, Mark A.
Kingsley, Karla J.
2012

Over the past three decades, carsharing has grown from a collection of local grassroots organizations into a worldwide industry. Traditional carsharing, though expanding, has a limited network of vehicles and locations. The next generation of shared-use vehicle services could overcome such expansion barriers as capital costs and land use by incorporating new concepts like personal vehicle sharing. Personal vehicle sharing provides short-term access to privately-owned vehicles. As of May 2012, there were 33 personal vehicle sharing operators worldwide, with 10 active or in pilot phase,...

Shared-Use Vehicle Services for Sustainable Transportation: Carsharing, Bikesharing, and Personal Vehicle Sharing across the Globe

Susan Shaheen
2012

This special issue of the International Journal of Sustainable Transportation highlights developments in shared-use vehicle research, in particular carsharing, public bikesharing, and personal vehicle sharing. Since the mid-1980s, shared-use vehicle services have gained momentum across the world. Developments include a range of operational models—private, non-profit, and governmental ventures; advanced technology; worldwide entry and growth; collaboration and competition; and increased activity by auto rental companies and automakers.

Carsharing and Personal Vehicle Services: Worldwide Market Developments and Emerging Trends

Susan Shaheen
Cohen, Adam
2012

Carsharing (or short-term auto use) provides a flexible alternative that meets diverse transportation needs across the globe, while reducing the negative impacts of private vehicle ownership. More than 65 years ago, carsharing began appearing in Europe. It has expanded to approximately 1,100 cities worldwide, in 26 nations on five continents. This article provides a global perspective of carsharing growth and future developments from 2006 through 2015, employing data from three surveys conducted in 2006, 2008, and 2010. The authors explore the interview findings of 25 carsharing experts...

Bikesharing across the Globe

Susan Shaheen
Guzman, Stacey
Zhang, Hua
2012

Concerns about global climate change, energy security, and unstable fuel prices have caused many decision makers and policy experts worldwideto closely examine the need for more sustainable transportation strategies. Sustainable strategies include clean fuels, vehicle technologies, transportation demand management, and integrated land use and transportation strategies (Shaheen and Lipman 2007). Bikesharing—the shared use of a bicycle fleet—is one mobility strategy that could help address many of these concerns. In recent years, interest in this evolving concept has spread across the globe...

Public Bikesharing in North America: Early Operator Understanding and Emerging Trends

Susan Shaheen
Cohen, Adam
Martin, Elliot, PhD
2013

Public bikesharing—the shared use of a bicycle fleet by the public—is an innovative mobility strategy that has recently emerged in major North American cities. Bikesharing systems typically position bicycles throughout an urban environment, among a network of docking stations, for immediate access. Approximately five years ago, information technology (or IT)-based bikesharing services began to emerge in North America. Between 2007 and March 2013, 28 IT-based programs have been deployed–24 are operational, two are temporarily suspended, and two are now defunct in the United States (U.S.)...

Exploring the Future of Integrated Transportation Systems in the United States from 2030 to 2050: Application of a Scenario Planning Tool

Susan Shaheen
Camel, Madonna
Lee, Kunik
2013

Intelligent transportation systems (ITS) have primarily focused on systems management. To further improve connectivity and safety in the future, ITS might embrace a more holistic planning approach. While the future of ITS remains an open question, its evolution is closely linked to how the world evolves on many dimensions, social, political, economic, legal, and environmental. In this paper, the authors present results from four expert workshops. These consisted of an initial steering committee workshop (February 2011), two expert scenario-planning workshops (June 2011), and a final...