Public Transportation

Shared-Use Vehicle Systems

Shaheen, Susan
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...

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

Shaheen, Susan, PhD
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...

Mobility on Demand (MOD) Demonstration: Dallas Area Rapid Transit Authority (DART) First and Last Mile Solution Evaluation Report

Martin, Elliot
Stocker, Adam
Cohen, Adam
Shaheen, Susan
2021

The Mobility on Demand (MOD) Sandbox Demonstration Program provides a venue through which integrated MOD concepts and strategies, supported through local partnerships, are demonstrated in real-world settings. For the 11 MOD Sandbox Demonstration projects, an 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 results from the independent evaluation of the Dallas Area Rapid Transit (DART) First and Last Mile Solution MOD Sandbox...

Public Bikesharing and Modal Shift Behavior: A Comparative Study of Early Bikesharing Systems in North America

Shaheen, Susan, PhD
Martin, Elliot, PhD
Cohen, Adam
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. This paper discusses the modal shift that results from individuals participating in four public bikesharing systems in North America. The authors conducted an online survey (n =10,661 total sample), between November 2011 and January 2012, with members of four major bikesharing organizations (...

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

Martin, Elliot, PhD
Shaheen, Susan, PhD
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...

Transportation Network Companies Might Be Pulling Riders from Public Transit, but This Could Change

Shaheen, Susan, PhD
Martin, Elliot, PhD
Stocker, Adam
2023

Transportation Network Companies (TNCs, also known as ridehailing and ridesourcing) have expanded across California over the past decade and changed the way people travel. Using a smartphone, travelers can quickly summon a vehicle from almost anywhere and know what the estimated wait time, travel time, and cost will be before stepping into the vehicle. While TNCs are clearly addressing an unmet need for travelers, their growing popularity has raised a number of policy questions, including if TNCs are shifting people away from public transit and other travel modes (e.g., carshare, walking,...

Understanding Curb Management and Targeted Incentive Policies to Increase Transportation Network Company Pooling and Public Transit Linkages

Shaheen, Susan
Darling, Wesley
Broader, Jacquelyn
Cohen, Adam
2021

Transportation network company (TNCs) rides that are shared amongst users (i.e., pooled) can offer a variety of benefits including increased mobility and reduced transportation emissions. However, very few TNC users select pooled trips and not all pooled rides are matched with other riders. This report supports increased pooling by exploring different pooling strategies and incentives. TNC users were actively engaged to offer insights through the photovoice methodology (a participatory research method that allows community members to use photography to communicate their personal...

Shared Automated Mobility and Public Transport

Lazarus, Jessica
Shaheen, Susan, PhD
Young, Stanley
Fagnant, Daniel
Voege, Tom
Baumgardner, Will
Fishelson, James
Lott, Sam
2017

Automated vehicle technology offers many opportunities to improve the quality of public transport. This chapter reviews key understanding and takeaways from an international workshop that took place in July 2016 at the Automated Vehicle Symposium in San Francisco, California, which focused on the ongoing development of shared automated mobility services and public transit. During the two-day workshop, speakers from the public and private sectors, academia, and nongovernmental organizations presented key findings from their work. Discussion centered around the implications of the...

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
Shaheen, Susan, PhD
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...

Bridging the Income and Digital Divide with Shared Automated Electric Vehicles

Lazarus, Jessica
Bauer, Gordon, PhD
Greenblatt, Jeffery, PhD
Shaheen, Susan, PhD
2021

This research investigates strategies to improve the mobility of low-income travelers by incentivizing the use of electric SAVs (SAEVs) and public transit. We employ two agent-based simulation engines, an activity-based travel demand model of the San Francisco Bay Area, and vehicle movement data from the San Francisco Bay Area and the Los Angeles Basin to model emergent travel behavior of commute trips in response to subsidies for TNCs and public transit. Sensitivity analysis was conducted to assess the impacts of different subsidy scenarios on mode choices, TNC pooling and match rates,...