by Innovative Mobility Research | Nov 2, 2020 |
Authors: Susan Shaheen and Adam Cohen Date: July 11, 2018 Abstract: Shared ride services allow riders to share a ride to a common destination. They include ridesharing (carpooling and vanpooling); ridesplitting (a pooled version of ridesourcing/transportation network companies); taxi sharing; and microtransit. In recent years, growth of Internet-enabled wireless technologies, global satellite systems, and cloud computing – coupled with data sharing – are causing people to increase their use of mobile applications to share a ride. Some shared ride services, such as carpooling and vanpooling, can provide transportation, infrastructure, environmental, and social benefits. This paper reviews common shared ride service models, definitions, and summarises existing North American impact studies. Additionally, we explore the convergence of shared mobility; electrification; and automation, including the potential impacts of shared automated vehicle (SAV) systems. While SAV impacts remain uncertain, many practitioners and academic research predict higher efficiency, affordability, and lower greenhouse gas emissions. The impacts of SAVs will likely depend on the number of personally owned automated vehicles; types of sharing (concurrent or sequential); and the future modal split among public transit, shared fleets, and pooled rides. We conclude the paper with recommendations for local governments and public agencies to help in managing the transition to highly automated vehicles and encouraging higher occupancy modes. View...
by Innovative Mobility Research | Mar 26, 2020 |
Authors: Elliot Martin, PhD, Adam Cohen, Ziad Yassine, Les Brown, Susan Shaheen, PhD Date: February 2020 Abstract: The Mobility on Demand (MOD) Sandbox Demonstration Program provides a venue through which integrated MOD concepts and solutions, supported through local partnerships, are demonstrated in real-world settings. For each of the 11 MOD Sandbox Demonstration projects, a MOD Sandbox Independent Evaluation was conducted that includes an analysis of project impacts from performance measures provided by the project partners and an assessment of the business models used. This document presents the Evaluation Report for the BART Integrated Carpool to Transit Access Program project. The project tested a number of hypotheses that explored the project impacts on carpooling, costs, enforcement, ridership, parking, and vehicle miles of travel (VMT). The evaluation generally found that the project increased overall carpooling to BART, commensurately increased the utilization of parking spaces by carpooling vehicles, and increased the number of people per vehicle parking at BART stations. The evaluation determined that the overall cost of enforcement per carpool space declined, primarily because spaces used for carpools increased without significantly increased enforcement burden. The evaluation did not have data available to determine whether illegal use of carpool spaces had changed significantly as a result of the project. On the related matter of enforcement, the evaluation did not have data to quantify changes in fraudulent use of carpool spaces and, instead, relied on discussions with enforcement staff, which suggested that fraudulent use had dropped as a result of the project. The evaluation did find that the project produced a wider distribution of arrival times to carpool spaces, which was an objective of BART, to...
by Innovative Mobility Research | Mar 3, 2020 |
Authors: Susan Shaheen, PhD, Adam Cohen, Michael Randolph, Emily Farrar, Richard Davis, and Aqshems Nichols Date: December 2019 Abstract: The Shared Mobility Policy Playbook provides an introduction and definitions of shared mobility services, mode-specific resources for agencies looking to develop policies in their community, and policy-focused tools demonstrating case studies and best practices for shared mobility. This playbook has been designed for individuals and practitioners who want to know more about shared mobility and to communities interested in incorporating shared mobility into their transportation ecosystem. It is a practical guide with resources, information, and tools for local governments, public agencies, and non-governmental organizations seeking to incorporate and manage innovative and emerging shared mobility services. The following are suggested uses of this playbook: Access shared mobility resources including: opportunities, lessons learned, and best practices for deploying shared mobility across the United States. Use this playbook as a guide for strategic transportation planning and incorporating shared mobility into transportation plans and models. Reference best practices, lessons learned, and case studies to aid public policy development....
by Innovative Mobility Research | Feb 28, 2020 |
Authors: Susan Shaheen, PhD, Adam Cohen, Nelson Chan, and Apaar Bansal Date: January 2020 Abstract: 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. It includes various forms of carsharing, bikesharing, scooter sharing, ridesharing (carpooling and vanpooling), transportation network companies (TNCs), and microtransit. Included in this ecosystem are smartphone “apps” that aggregate and optimize these mobility options, as well as “courier network services” that provide last mile package and food delivery. This chapter describes different models that have emerged in shared mobility and reviews research that has quantified the environmental, social, and transportation-related impacts of these services....
by Innovative Mobility Research | Jan 8, 2019 |
Authors: Susan Shaheen, PhD, Nelson Chan, Theresa Gaynor Date: October 2016 Abstract: Casual carpooling is an informal form of commuter ridesharing operating in Washington, D.C.; Houston, Texas; and San Francisco, California. In contrast to new forms of shared-use mobility, casual carpooling has been in existence for over 30 years and uses no information communication technology, and is entirely run informally by its users. Researchers have been fascinated by this phenomenon and have conducted studies in the past, but there remains a lack of up-to-date quantitative data. This study examines the motivations and behaviors of casual carpoolers in the San Francisco Bay Area to understand user characteristics and motivations. In Winter 2014, the authors observed and counted participants and vehicles at four casual carpooling locations, interviewed participants riding in carpooling vehicles (N=16), and conducted intercept surveys (N=503) at ten East Bay pickup locations. The results indicate that the motivations for casual carpooling participation include convenience, time savings, and monetary savings, while environmental and community-based motivations ranked low. Casual carpooling is an efficient transportation option for these commuters, while environmental sustainability benefits are a positive byproduct. Seventy-five percent of casual carpool users were previously public transit riders, and over 10% formerly drove alone. Logit modeling found that casual carpool role (i.e., always a rider or sometimes a driver), age, and employment status were key drivers in modal choice. Further research on a larger scale is needed to identify the elements needed for system replication in different areas. View...
