TSRC

Do Incentives Make a Difference? Understanding Smart Charging Program Adoption for Electric Vehicles

Wong, Steven D.
Shaheen, Susan A.
Martin, Elliot PhD
Uyeki, Robert
2023

Climate change and environmental problems have spurred new strategies to reduce fossil fuel consumption in transportation. Two important strategies include a rapid transition to green energy and the replacement of internal combustion vehicles with electric vehicles (EVs). However, the increasing demand for electricity by EVs, especially from time-dependent green sources of energy (e.g., solar, wind), will likely overload the grid at peak hours. Rather than build costly infrastructure improvements for distribution and generation, smart charging programs for EVs could defer charging to off-...

Mobility and the Sharing Economy: Industry Developments and Early Understanding of Impacts

Shaheen, Susan, PhD
Bansal, Apaar
Chan, Nelson
Cohen, Adam
2017

Shared mobility—the shared use of a vehicle, bicycle, or other mode—is an innovative transportation strategy that enables users to gain short-term access to transportation modes on an “as-needed” basis. Shared mobility includes various forms of carsharing, bikesharing, ridesharing, on-demand ride services, and microtransit. Additionally, smartphone and mobile “apps” aggregate and optimize these mobility services and are critical to many shared mobility modes. Courier network services connect couriers using their personal vehicles or bicycles with freight and seek to disrupt the existing...

Micromobility Evolution and Expansion: Understanding How Docked and Dockless Bikesharing Models Complement and Compete – A Case Study of San Francisco

Lazarus, Jessica
Pourquier, Jean Carpentier
Feng, Frank
Hammel, Henry
Shaheen, Susan
2020

Shared micromobility – the shared use of bicycles, scooters, or other low-speed modes – is an innovative transportation strategy growing across the United States that includes various service models such as docked, dockless, and e-bike service models. This research focuses on understanding how docked bikesharing and dockless e-bikesharing models complement and compete with respect to user travel behaviors. To inform our analysis, we used two datasets from February 2018 of Ford GoBike (docked) and JUMP (dockless electric) bikesharing trips in San Francisco. We employed three methodological...

Shared Mobility Policy Playbook

Shaheen, Susan, PhD
Cohen, Adam
Randolph, Michael
Farrar, Emily
Davis, Richard
Nichols, Aqshems
2019

Shared mobility can include roundtrip services (a vehicle, bicycle, scooter, or other mode is returned to its origin); one-way station-based services (a vehicle, bicycle, scooter, or other mode is returned to a different designated station location); and one-way free-floating services (a vehicle, bicycle, scooter, or other mode can be returned anywhere within a geographic area). To help manage free-floating services, cities and shared mobility operators may use technologies like geofencing. Geofencing is a technology that uses GPS or RFID technology to create a virtual boundary, enabling...

Zero-emission vehicle exposure within U.S. carsharing fleets and impacts on sentiment toward electric-drive vehicles

Shaheen, Susan
Martin, Elliot
Totte, Hannah
2020

Reducing carbon emissions from the United States (U.S.) transportation sector has emerged as a priority action to combat climate change. Carsharing and zero-emission vehicles (ZEVs) could be integral to creating a more sustainable transportation system. This paper presents the results of a study that evaluated the impacts of ZEV exposure on U.S. carsharing users. Surveys were administered to control and experimental groups of carsharing members that used shared PHEVs or EVs. Results showed that users who drove shared PHEVs or EVs more frequently were more likely to exhibit improved ZEV...

Ridesharing in North America: Past, Present, and Future

Chan, Nelson D.
Shaheen, Susan A.
2011

Since the late-1990s, numerous ridematching programs have integrated the Internet, mobile phones, and social networking into their services. Online ridematching systems are employing a range of new strategies to create “critical mass:” 1) regional and large employer partnerships, 2) financial incentives, 3) social networking to younger populations, and 4) real-time ridematching services that employ “smartphones” and automated ridematching software. Enhanced casual carpooling approaches, which focus on “meeting places,” are also being explored. Today, ridesharing represents approximately 8...

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

Shaheen, Susan
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 fuel economy. Despite the benefits of a combined policy approach, these strategies are normally employed separately. Nevertheless, they have been linked occasionally, for instance in theelectric 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...

An Initial Assessment of the Potential Weather Barriers of Urban Air Mobility

Reiche, Colleen PhD
Cohen, Adam
Fernando, Chris
2021

Urban Air Mobility (UAM), a subset of advanced air mobility, is a concept that envisions safe, sustainable, affordable, and accessible air transportation for passenger mobility, cargo delivery, and emergency management within or traversing a metropolitan area. In recent years, several companies have designed and tested enabling elements of this concept, including; prototypes of vertical take-off and landing (VTOL) aircraft, operational concepts, and market studies to understand potential business models. While UAM may be enabled by the convergence of several factors, a number of barriers...

Examining 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 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...

Chapter 6: Mobility on Demand: Evolving and Growing Shared Mobility in the Suburbs of Northern Virginia

Shaheen, Susan
Cohen, Adam
Farrar, Emily
2019

For as long as there have been cities, there have been suburbs. Shared mobility—the shared use of a vehicle, bicycle, or other travel mode—is an innovative transportation strategy that enables users to have short-term access to a transportation mode on an as-needed basis. Shared mobility can enhance access and reduce social exclusion in lower-density environments and provide transportation options to carless and public transit-dependent households, particularly in areas without high-quality, fixed-route public transportation service. This chapter discusses the design and evolution of...