Shared Mobility

Shared-Use Vehicle Systems

Susan Shaheen
2002

In recent years, shared-use vehicle systems have garnered a great deal of interest and activity internationally as an innovative mobility solution. In general, shared-use vehicle systems consist of a fleet of vehicles that are used by several different individuals throughout the day. Shared-use vehicles off the convenience of the private automobile and more flexibility than public transportation alone. These systems are attractive since they offer the potential to lower a user’s transportation costs; reduce the need for parking spaces in a community; improve overall air quality; and...

California's Zero-Emission Vehicle Mandate: Linking Clean-Fuel Cars, Carsharing, and Station Car Strategies

Susan Shaheen
Wright, John
Sperling, Daniel
2002

To reduce transportation emissions and energy consumption, policymakers typically employ one of two approaches—changing technology or changing behavior. These strategies include demand management tools, such as ridesharing and vehicle control technologies—cleaner fuels and fueleconomy. Despite the benefits of a combined policy approach, these strategies are normally employed separately. Nevertheless, they have been linked occasionally, for instance in the electric station car programs of the 1990s. Station cars are vehicles used by transit riders at the start or end of a trip. In 1990, the...

Research Approach and Early Findings

Susan Shaheen
Wright, John
2001

CarLink II is a commuter-based carsharing pilot project administered by the Institute of Transportation Studies at the University of California, Davis (ITS-Davis) in conjunction with Caltrans, American Honda Motor Company, and Caltrain. Partners for Advanced Transit and Highways (PATH) researchers are conducting the evaluation. Launched in Summer 2001, CarLink II continues the investigation of commuter-based carsharing that was originally explored in the 1998 CarLink longitudinal survey (Shaheen, 1999) and the1999 CarLink I field test (Shaheen et al., 2000). Lessons learned during the...

U.S. Shared-Use Vehicle Survey Findings: Opportunities and Obstacles for Carsharing and Station Car Growth

Susan Shaheen
Meyn, Mollyanne
Wipyewski, Kamill
2003

Shared-use vehicle services provide members access to a vehicle fleet for use on an as needed basis, without the hassles and costs of individual auto ownership. From June 2001 to July 2002, the authors surveyed 18 U.S. shared-use vehicle organizations on a range of topics, including organizational size, partnerships, pricing, costs, and technology. While survey findings demonstrate a decline in the number of organizational starts in the last year, operational launches into new cities, membership, and fleet size continue to increase. Several growth-oriented organizations are responsible for...

Economic and Environmental Benefits of Automated Electric Vehicle Ride-Hailing Services in New York City

Zeng, Teng
Zhang, Hongcai
Scott Moura
Shen, Zuo-Jun M.
2024

A precise, scalable, and computationally efficient mathematical framework is proposed for region-wide autonomous electric vehicle (AEV) fleet management, sizing and infrastructure planning for urban ride-hailing services. A comprehensive techno-economic analysis in New York City is conducted not only to calculate the societal costs but also to quantify the environmental and health benefits resulting from reduced emissions. The results reveal that strategic fleet management can reduce fleet size and unnecessary cruising mileage by up to 40% and 70%, respectively. This alleviates traffic...

Davis Smart Mobility Model Project: Initial Scoping and Planning Study

Susan Shaheen
Finson, Rachel S.
2003

The goal of the Davis Smart Mobility Model project is to optimize individual mobility options through improved connectivity among modes, enhanced techniques to link land-use planning and transportation system design, advanced information technologies, and clean-fuel vehicles. The California PATH/Caltrans partnership with the University of California, Davis (UC Davis) started when campus planners expressed interest in learning how innovative mobility services and technologies (such as carsharing and smart parking management) might help to alleviate the transportation impacts of a campus...

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

Barth, Matthew
Todd, Michael
Susan Shaheen
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 vehicles offer 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. Many shared-use vehicle...

Carsharing and Partnership Management: An International Perspective

Susan Shaheen
Sperling, Dan
Wagner, Conrad
2004

Most cars carry one person and are used for less than 1 hour per day. A more economically rational approach would be to use vehicles more intensively. Carsharing, in which a group of people pays a subscription plus a per-use fee, is one means of doing so. Carsharing may be organized through affinity groups, large employers, transit operators, neighborhood groups, or large carsharing businesses. Relative to car ownership, carsharing has the disadvantage of less convenient vehicle access but the advantages of a large range of vehicles, fewer ownership responsibilities, and less cost (if...

Policy Considerations for Carsharing and Station Cars: Monitoring Growth, Trends, and Overall Impacts

Susan Shaheen
Schwartz, Andrew
Wipyewski, Kamill
2004

Since the late-1990s, over 25 U.S. shared-use vehicle programs—including carsharing and station cars—have been launched. Given their presumed social and environmental benefits, the majority of these programs received some governmental support—primarily in the form of startup grants and subsidized parking. As of July 2003, there were a total of 15 shared-use vehicle programs, including 11 carsharing organizations, two carsharing research pilots, and two station car programs. Over the last five years, U.S. carsharing membership has experienced exponential growth.Despite this expansion, the...

Improving Bay Area Rapid Transit (BART) District Connectivity and Access with the Segway Human Transporter and Other Low Speed Mobility Devices

Rodier, Caroline J.
Susan Shaheen
Novick, Linda
2004

Access to transit stations is a significant barrier to transit use in many urban regions. Parking during peak hours is often limited, and many individuals are only willing to walk about a quarter mile to transit stations (Cervero, 2001). While there are some effective feeder services (e.g., shuttles) that help extend the range of transit access, these systems are limited because of fixed routes and schedules. A number of strategies have recently been implemented to improve transit access and transit use, including bicycles, electric bicycles, carsharing, and personal neighborhood electric...