TSRC

Evaluating Public Transit Modal Shift Dynamics In Response to Bikesharing: A Tale of Two U.S. Cities

Martin, Elliot, PhD
Susan Shaheen
2014

Public bikesharing—the shared use of a bicycle fleet—has recently emerged in major North American cities. Bikesharing has been found to decrease driving and increase bicycling. But shifts in public transit have been mixed. The authors evaluate survey data from two U.S. cities to explore who is shifting toward and away from public transit as a result of bikesharing. The authors explore this question by mapping geocoded home and work locations of respondents within Washington DC and Minneapolis. Respondents were mapped by their modal shift toward or away from bus and rail transit. The...

Evolution of E-Mobility in Carsharing Business Models

Susan Shaheen
Chan, Nelson
2014

Carsharing continues to grow worldwide as a powerful strategy to provide an alternative to solo driving. The viability of electric vehicles, or EVs, has been exam-ined in various carsharing business models. Moreover, new technologies have given rise to electromobility, or e-mobility, systems. This paper discusses the evolution of e-mobility in carsharing business models and the challenges and opportunities that EVs present to carsharing operators around the world. Operators are now anticipating in-creased EV proliferation into vehicle fleets over the next 5-10 years as technology,...

Automated Vehicles, On-Demand Mobility and Environmental Impacts

Greenblatt, Jeffery
Susan Shaheen
2015

We review the history, current developments, projected future trends and environmental impacts of automated vehicles (AVs) and on-demand mobility, and explore potential synergies. Many automobile manufacturers and Google plan to release AVs between 2017 and 2020, with potential benefits including increased safety, more efficient road use, increased driver productivity and energy savings. Estimates of AV energy use and greenhouse gas (GHG) emissions range from an ~80 % or greater decrease to a threefold increase; however, we argue that net decreases are likely. On-demand mobility services...

Exploring Electric Vehicle Carsharing As A Mobility Option for Older Adults: A Case Study of A Senior Adult Community in The San Francisco Bay Area

Susan Shaheen
Cano, Lauren
Camel, Madonna
2015

By the year 2030, 57 million people will be over the age of 65 in the United States. Baby Boomers drive approximately 17% more than other age groups and are active well past retirement. This paper examines electric vehicle (EV) carsharing (short-term vehicle access) as a future alternative to vehicle ownership for older adults living on fixed incomes in a gated community to provide reduced cost mobility and eliminate vehicle maintenance hassles. The authors conducted a study of the response to the EV carsharing concept in a senior community in Northern California, between Winter 2009 and...

Just A Better Taxi? A Survey-Based Comparison of Taxis, Transit, and Ridesourcing Services in San Francisco

Rayle, Lisa
Dai, Danielle
Chan, Nelson
Cervero, Robert
Susan Shaheen
2016

In this study, we present exploratory evidence of how “ridesourcing” services (app-based, on-demand ride services like Uber and Lyft) are used in San Francisco. We explore who uses ridesourcing and for what reasons, how the ridesourcing market compares to that of traditional taxis, and how ridesourcing impacts the use of public transit and overall vehicle travel. In spring 2014, 380 completed intercept surveys were collected from three ridesourcing “hot spots” in San Francisco. We compare survey results with matched-pair taxi trip data and results of a previous taxi user survey. We also...

Shared Mobility: A Sustainability & Technologies Workshop: Definitions, Industry Developments, and Early Understanding

Susan Shaheen
Chan, Nelson
Bansal, Apaar
Cohen, Adam
2015

Shared mobility - the shared use of a vehicle, bicycle, or other mode - enables users to gain short-term access to transportation modes on an “as-needed” basis. Shared mobility includes carsharing, bikesharing, ridesharing, and on-demand ride services. It can also include alternative transit services, such as paratransit, shuttles, and private transit services. Smartphone “apps” are available to aggregate options and optimize routes. New ways of transporting and delivering goods also have emerged with the potential to change the nature of the package and food delivery industry. Shared...

Understanding Carsharing Risk and Insurance Claims in the United States

Susan Shaheen
Shen, Diwen
Martin, Elliot
2016

Carsharing offers consumers short-term access to vehicles, which facilitates better mobility and reduces the need for personal vehicle ownership. Carsharing does not require consumers to have automobile insurance. Instead, carsharing operators insure their members and are responsible for the risks and liabilities associated with vehicle use. Carsharing operators are burdened with obtaining cost-effective insurance under a usage model that lacks massive actuarial data and analysis. This study analyzes 28 operator years of trips and claims data from six carsharing operators in the United...

Mobility and the Sharing Economy: Potential to Overcome First- and Last-Mile Public Transit Connections

Susan Shaheen
Chan, Nelson
2016

Shared mobility—the shared use of a motor vehicle, bicycle, or other mode—enables travelers to gain short-term access to transportation modes on an as-needed basis. The term “shared mobility” includes the modes of carsharing, personal vehicle sharing (peer-to-peer carsharing and fractional ownership), bikesharing, scooter sharing, traditional ridesharing, transportation network companies (or ridesourcing), and e-Hail (taxis). It can also include flexible transit services, including microtransit, which supplement fixed-route bus and rail services. Shared mobility has proliferated in global...

Generic Time- and Method-Interdependencies of Empirical Impact-Measurements: A Generalizable Model of Adaptation-Processes of Carsharing-Users' Mobility-Behavior Over Time

Firnkorn, Jörg
Susan Shaheen
2016

The purpose of this article is to advance empirical sustainability-evaluations of carsharing-systems. Carsharing, a frequently cited example of a product–service system (PSS), is currently morphing from a niche into a mainstream mode of transportation. Carsharing has the potential to provide a more sustainable mobility-option compared to private car usage, for example by reducing the overall motor-vehicle traffic in cities. However, the quantification of this potential is complex, and few studies have analyzed the fundamental impacts of the chosen measurement-methodology on the results of...

Shared Mobility: Current Practices and Guiding Principles Brief

Susan Shaheen
Cohen, Adam
Zohdy, Ismail
Kock, Beaudry
2016

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. The term shared mobility includes various forms of carsharing, bikesharing, ridesharing (carpooling and vanpooling), and on-demand ride services. It can also include alternative transit services, such as paratransit, shuttles, and private transit services (called microtransit), which can supplement fixed-route bus and rail services. With diverse options for mobility on the rise, smartphone...