Data

Investigation of Elderly Driver Safety and Comfort: In-Vehicle Intersection “Gap Acceptance Advisor” and Identifying Older Driver Needs

Bougler, Benedicte
Cody, Delphine
Geyer, Judy
Horne, Jedidiah H.
Misener, James A.
Nowakowski, Christopher
Rodier, Caroline J., PhD
Ragland, David, PhD
Susan Shaheen
Caguimbaga, Joy
Daniels, Bevin
Hamel, Kathryn, PhD
2005

Our work in Toyota GapAdvise is comprised of two interrelated elements: identify driving task challenges, and a pilot study on one particular class of decision support system, an intersection gap advisor. From these elements, we have recommended countermeasures and potential design guidelines for the elderly driving population in the United States.We performed our work in the following sequence of technical tasks, each corresponding to a section heading in this final report:Determine Extent of Problem (Task 1). From crash databases and demographic data, we have determined the projected...

Travel Behavior of Mexican and Other Immigrant Groups in California

Handy, Susan
Blumenberg, Evelyn
Donahue, Moria
Lovejoy, Kristin
Rodier, Caroline
Susan Shaheen
Shiki, Kimiko
Song, Lily
2008

California is the destination for over one-quarter of immigrants to the United States, and immigrants now make up over one-quarterof the state's population. To ensure that transportation systems and services adequately meet the needs of recent immigrants, planners need a firm understanding of the travel behavior of immigrant groups. This paper reports on key findings from a three-phased study: (1) analysis of data on commute travel of California immigrants from the 1980, 1990, and 2000 Censuses; (2) focus groups with recent Mexican immigrants on their transportation experiences and needs...

Carsharing and the Built Environment: Geographic- Information System-Based Study of One U.S Operator

Stillwater, Tai
Mokhtarian, Patricia L.
Susan Shaheen
2009

The use of carsharing vehicles over a period of 16 months in 2006-07 was compared to built environment and demographic factors in this GIS-based multivariate regression study of an urban U.S. carsharing operator. Carsharing is a relatively new transportation industry in which companies provide members with short-term vehicle access from distributed neighborhood locations. The number of registered carsharing members in North America has doubled every year or two to a current level of approximately 320,000. Researchers have long supposed that public transit access is a key factor driving...

Travel Behavior of Immigrant Groups in California

Handy, Susan, PhD
Blumenberg, Evelyn, PhD
Donahue, Moira
Lovejoy, Kristin
Rodier, Caroline, PhD
Susan Shaheen
Shiki, Kimiko
Song, Lily
Tal, Gil
2009

California is the destination for over one-quarter of immigrants to the United States, and immigrants now make up over one-quarter of the state’s population, with nearly half of immigrants originating in Mexico. To ensure that transportation systems and services adequately meet the needs of recent immigrants, planners need a firm understanding of the travel behavior of immigrant groups. This paper reports on key findings from a three-phased study: (1) analysis of data on commute travel of California immigrants from the 1980, 1990, and 2000 Censuses; (2) focus groups with recent Mexican...

Transit-Based Smart Parking: An Evaluation of the San Francisco Bay Area Field Test

Rodier, Caroline J.
Susan Shaheen
2010

This paper presents an evaluation of the first transit-based smart parking project in the US at the San Francisco Bay Area Rapid Transit (BART) District station in Oakland, California. The paper begins with a review of the smart parking literature; next the smart parking field test is described including its capital, operational, and maintenance costs; and finally the results of the participant survey analysis are presented. Some key user response results are: (1) most participants used the smart parking system 1–3 days a month for commute travel and (2) 37% of respondents had seen the...

The Impact of Carsharing on Public Transit and Non-Motorized Travel: An Exploration of North American Carsharing Survey Data

Martin, Elliot
Susan Shaheen
2011

By July 2011, North American carsharing had grown to an industry of nearly 640,000 members since its inception on the continent more than 15 years ago. Carsharing engenders changes in member travel patterns both towards and away from public transit and non-motorized modes. This study, which builds on the work of two previous studies, evaluates this shift in travel based on a 6281 respondent survey completed in late-2008 by members of major North American carsharing organizations. Across the entire sample, theresults showed an overall decline in public transit use that was statistically...

Evaluating the Public Perception of a Feebate Policy in California through the Estimation and Cross-Validation of an Ordinal Regression Model

Martin, Elliot, PhD
Susan Shaheen
Lipman, Timothy
Camel, Madonna
2014

Understanding the roots of policy perception can be critical for informing the design and implementation of innovative public policies; Feebates is one such innovative policy and in the context of new vehicles can be designed to offer buyers a rebate for the purchase of low-emission vehicles and a fee for the purchase of high-emission vehicles; Because feebates is a policy that directly impacts the consumer, understanding the dynamics of public perception, support, and opposition is important; This study explores the public perception of a feebate policy within California and evaluates the...

One-Way Carsharing's Evolution and Operator Perspectives from the Americas

Susan Shaheen
Chan, Nelson
Micheaux, Helen
2015

Classic roundtrip carsharing has been documented as a strategy to reduce car ownership and vehicle miles/kilometers traveled in urban areas. The expansion of carsharing and other forms of shared-use mobility have led to a growing interest in understanding the latest models. In recent years, one-way carsharing has gained momentum across the globe with 18 operators providing services in ten countries worldwide. One-way carsharing does not require its users to return the vehicle to the same location from which it was accessed (in contrast to roundtrip carsharing). Users typically pay by the...

Understanding Travel Behavior: Research Scan

Martin, Elliot
Susan Shaheen
Zohdy, Ismail
2016

Travel behavior is undergoing a period of significant change in the United States, and this change is beginning to reveal itself in long-standing measures of transportation. While the United States is still heavily dependent on the personal automobile for mobility, changes in technology, demographics, economics, and attitudes are transforming how mobility is attained. At the same time, advances in information technology are opening new ways for transportation activity to be measured more comprehensively. These transformative trends are reshaping how we think about transportation policy,...

Equity and Shared Mobility

Susan Shaheen
Cohen, Adam
2018

Ensuring equal access for protected classes impacted by shared mobility services is critical. In California, this can include provisions mandating access for individuals with disabilities, as well as prohibitions in discrimination against other protected classes. Many of these laws not only prohibit discrimination against the end user but also shared mobility employees. In addition to prohibiting discrimination, it is imperative to ensure shared mobility is accessible to all. Equitable treatment of shared mobility providers (e.g., data, insurance, licensing) is also a key consideration.