Transportation Commons^™

Equity Evaluation Of Residents’ Transit+Walk Accessibility To Sacramento Healthcare Facilities, Masoud Ghodrat Abadi, Ahoura Zandiatashbar, Aaron Pickett, Stephanie Nemet, Soheil Sharifi

Mineta Transportation Institute

Access to healthcare is a key component of public health equity, yet many U.S. communities remain dependent on private vehicles for medical travel. This study introduces an integrated framework, the Transit+Walk Score (TWS), to evaluate how effectively residents of Sacramento, California, can reach healthcare facilities via public transit and how safely, comfortably, and conveniently they can walk from transit stops to those facilities. The research aims to inform planners, transit agencies, and policy makers in designing equitable and multimodal transportation systems. The research team combined geospatial network modeling and field-based walkability audits to assess 123 healthcare facilities across Sacramento, with …

Scoring Equitable Transit: A Data-Driven Framework For Affordable Transit-Oriented Development In California, Ahoura Zandiatashbar, Anton Rozhkov, Stephanie Nemet, Atticus Washington, Mounashree Prasanna

Mineta Transportation Institute

Transit-Oriented Development (TOD) is a cornerstone of California’s climate and land use policy, promising walkable, compact neighborhoods near high-quality transit. However, these benefits are not always distributed equitably. This study introduces a scalable framework for identifying and scoring Affordable Transit-Oriented Development (A-TOD) across the state’s High-Quality Transit Areas (HQTAs). The goal is to equip policymakers, planners, and housing agencies with tools to evaluate station areas based on their physical form, affordability, and equity outcomes. Using a 1.5-mile network-based pedestrian buffer around over 66,000 transit stations, the research team developed a three-stage clustering and scoring system. Station areas were classified by …

A Comprehensive Study Of Impacts Of “Q” Bus Rapid Transit System On Blackstone Avenue, Yertai Tanai, Kamil Ciftci

Mineta Transportation Institute

This study examines the dual impact of the Fresno Area Express (FAX) Q Line, a 15.7-mile Bus Rapid Transit (BRT) system launched in 2018, on the Fresno housing market and passenger satisfaction. The Q Line, designed to modernize public transit, features eco-friendly compressed natural gas (CNG) vehicles, real-time passenger information, and improved service efficiency. Housing market analysis focused on residential properties sold between 2012 and 2024, utilizing Geographic Information System(GIS) mapping to segment properties into three regions: the Q Line corridor, an outer buffer zone, and the rest of Fresno. Results indicate no statistically significant increase in property values within …

Geography Of Non-Daytime Work And Employer-Centered Transit Accessibility, Julia Mai Plotts

Dissertations and Theses

Non-daytime shift workers--including those on evening, night, rotating, and split shifts--face unique transportation challenges. Those who rely on public transit often contend with complicated commutes and longer wait times on public transit systems that have traditionally catered to the 9-to-5 workforce. Meanwhile, the non-daytime workforce is disproportionately composed of marginalized groups, including low-income workers, racial and ethnic minorities, and individuals with fewer education credentials. For many lower-income workers, car ownership does not present a viable alternative, as cost-of-ownership consumes a significant portion of their income. This makes access to nighttime public transit a critical equity concern. However, most transit accessibility …

Understanding The Prevalence Of Mental Health And Behavioral Distress In Transit Assaults And Presenting Targeted Response And Mitigation Methods To Reduce Victimization Trends, Kathleen Moore, Emilie Ellenberg, Melissa Carlson, Jodi Godfrey, Lisa Staes

Mineta Transportation Institute

This research project was performed to better understand the prevalence of mental health and behavioral distress in transit assaults and present corresponding targeted response and mitigation methods to reduce victimization trends. It includes a literature review, a data presentation and overview of reported public transit assault-related events, an examination of the contributing factors to those events, and documentation of 10 transit agency case studies. The literature review discusses some of the misconceptions of mental illness and associated stigmas and discrimination that can occur in response to these misconceptions. It discusses various approaches and strategies that transit agencies have used to …

Psychosocial Determinants Of Public Transportation Use Among Brazilian And American Users: An Integrated Modeling Approach, Ingrid Luiza Neto, Hartmut Günther, Bryan E. Porter, Taciano L. Milfont, Pastor Willy Gonzales Taco, Caroline Cardoso Machado

Psychology Faculty Publications

Overreliance on cars can promote individual, environmental, economic and social problems, requiring the development of measures to reduce car use and encourage the use of more sustainable transport options. Contributing to this call, here we report a cross-cultural study conducted in Brazil (n = 312) and the United States (n = 518) investigating the applicability of the model of Bamberg and Möser in predicting the use of public transport. Results indicated the model is equivalent across samples, regarding both the measures and the relations between the variables of the model. Intention strongly predicted self-reported public transport behaviour, explaining 70% of …

Understanding Mobility-Related Challenges For Aapi Older Adults: A Preliminary Study In Southern California, Yongping Zhang, Priscila Salgado Inzunza, Carol Kachadoorian, Wen Cheng, Calvin Wong

Mineta Transportation Institute

The Federal Highway Administration (FHWA) and state Departments of Transportation (DOTs) Nationwide, the Asian American Pacific Islander (AAPI) community is projected to constitute 11 percent of people 65 years and older in the United States by 2050 (He et al., 2005). The challenges limiting the transportation and mobility of AAPI older adults include, but are not limited to, language barriers, cultural barriers, anti-Asian hate, accessibility to public transit, traffic safety and public security concerns, and changes to mobility due to the COVID-19 pandemic. This project conducted an extensive literature review and a preliminary multi-language survey in Southern California to better …

Zero-Emission Buses In The Us: Understanding And Addressing Market And Policy Challenges, Leah Foecke, Zachary Karson, Thomas Tiberghien

Mineta Transportation Institute

As the US public transportation sector accelerates its shift from fossil fuels to zero-emission alternatives, transit agencies and transit bus manufacturers alike face significant uncertainty and instability. This report provides policymakers with updated insights into the US transit bus market, focusing on key industry dynamics, financial challenges with zero-emission bus (ZEB) acquisition, technological obstacles in deployment, and regulatory issues. The research relies on interviews with stakeholders, a detailed review of existing literature, and an analysis of US public transit data. Key findings reveal ongoing challenges related to costs, supply, reliability, and workforce development, all of which hinder the adoption of …

Governing Structures For Successful Regional Transit Coordination And Their Formation, Charles Rivasplata, Richard Lee, Michelle Derobertis, Christopher Ferrell

Mineta Transportation Institute

The expansion of metropolitan areas in California has further prompted the need to improve transportation options for all, more effectively linking origins and destinations through key enhancements to the existing network of transit services. This study provides planners and policymakers examples of effective regional transit coordination agencies. To improve multimodal connections and enhance transit services at the local and regional levels, this study explores regional coordination, focusing on entities charged with coordinating multiple transit agencies in a single metropolitan area. The study identified 16 regional transit coordinators (RTCs), identifying the structure, scope, and management of each. The results revealed that …

Assessing Gtfs Accuracy, Gregory L. Newmark

Mineta Transportation Institute

The promised benefits of the General Transit Feed Specification (GTFS) Schedule and Realtime standards are dependent on the underlying quality of the data. Despite this fundamental reliance, there has been relatively little research on techniques and strategies to assess GTFS accuracy. The need for such assessment is growing as federal and state governments increasingly require transit agencies to make these data available to the public. This research fills this gap by presenting a suite of methods and metrics to assess the temporal accuracy of GTFS Realtime and the spatial accuracy of GTFS Schedule feeds. The temporal assessment demonstrates an approach …

Misconduct On Public Transit: An Exploratory Analysis Using The Comments Formerly Known As Tweets, Egbe Etu Etu, Asha Weinstein Agrawal, Imokhai Tenebe, Jordan Larot, Dang Minh Nhu Nguyen

Mineta Transportation Institute

This project developed a simple methodology for using Twitter data to explore public perceptions about misconduct on public transit in California. The methodology allows future researchers to analyze tweets to answer questions such as: How frequent are tweets related to assault, abuse, or other misconduct on public transit? What concerns arise most frequently? What are the types of behaviors discussed? We collected and analyzed data from Twitter posts in California about various types of public transit misconduct from January 2020 to March 2023 to identify the nature and frequency of reported misconduct. Our findings reveal that harassment, uncivil behavior, and …

Incorporating Public Health Into Transportation Decision Making, Bruce Appleyard, Tim Garrett

Mineta Transportation Institute

Investments in transportation have the potential to significantly affect public health outcomes. Decisions to build highways, transit, or bikeways, for example, influence how residents and visitors move around a metropolitan area. Personal travel habits and proximity to transportation infrastructure play a role in how likely people are to be physically active or be exposed to dangerous traffic and toxic pollution. For this study, the research team reviewed the literature that links transportation infrastructure, the surrounding built environment context, and public health outcomes such as chronic heart and lung diseases, obesity, and death. The team then researched publicly available data that …

More Roads Or Public Transit? Insights From Measuring City-Center Accessibility, Lucas Conwell, Fabian Eckert, Ahmed Mushfiq Mobarak

Discussion Papers

We propose a theory-inspired measure of the accessibility of a city’s center: the size of the surrounding area from which it can be reached within a specific time. Using publicly-available optimal routing software, we compute these ”accessibility zones” for the 109 largest American and European cities, separately for cars and public transit commutes. Compared to European cities, US cities are half as accessible via public transit and twice as accessible via cars. Car accessibility zones are always larger than public transit zones, making US cities more accessible overall. However, US cities’ car orientation comes at the cost of less green …

Understanding Covid-19’S Impact On Local Transportation Revenue –A Mid-Crisis View From Experts, Asha Weinstein Agrawal, Serena Alexander, Ashley M. Hooper

Mineta Transportation Institute

When COVID-19 swept into the United States in early 2020, it upended two patterns of behavior critical to transportation funding: how people traveled and where economic activity occurred. This study explored how, one year into the pandemic, experts in California believed that the COVID-19 pandemic was impacting local transportation budgets. We interviewed 34 funding experts who represented local transportation and public works departments, state officials, and municipal finance experts. In these conversations, conducted from December 2020 to March 2021, we asked interviewees how they saw COVID-19 impacting their overall local transportation budgets in the short and long term as well …

Development Of Guidelines For Collecting Transit Ridership Data, Hong Yang, Kun Xie, Sherif Ishak, Qingyu Ma, Yang Liu

Computational Modeling & Simulation Engineering Faculty Publications

Transit ridership is a critical determinant for many transit applications such as operation optimizations and project prioritization under performance-based funding mechanisms. As a result, the quality of ridership data is of utmost importance to both transit administrative agencies and transit operators. Many transit operators in Virginia report their ridership data to the Department of Rail and Public Transportation (DRPT) and the National Transit Database (NTD). However, with no specific guidelines available to transit agencies in Virginia for collecting ridership data, the heterogeneous mixture of diverse data collection methods and technologies has often raised concerns about the consistency and quality of …

How Do California’S Local Governments Fund Surface Transportation? A Guide To Revenue Sources, Asha Weinstein Agrawal, Kevin Yong Lee, Serena Alexander

Mineta Transportation Institute

California local agencies raise the revenue to support high-quality transportation services and infrastructure from a patchwork of federal, state, and local sources. To assist policymakers and transportation experts as they explore options for creating a more sustainable funding system, this report presents an overview of the taxes and fees that currently generate revenue ultimately dedicated to paying for transportation at the sub-state—or “local”—level. The discussion covers federal and state as well as local sources. The report also traces the evolving contribution from each level of government for expenditures on California’s local streets and roads and public transit, looking back two …

Mass Transit Policy: Responding To Covid-19, Susan E. Baer, George R. Larkin

Journal of Sustainable Social Impact

Mass transit is vital to daily life in U.S. cities and many other cities throughout the world. Mass transit systems are vulnerable to pandemics like COVID-19 and other less serious threats. Post COVID-19 mass transit policy must be different than its predecessors if mass transit is to provide a reliable, sustainable, and equitable means of transportation. Future mass transit systems will be the outcome of public health, technological, economic, and political considerations. This paper provides an initial attempt to identify and discuss these four considerations as most relevant to the development of an equitable and efficient mass transit policy for …

Cost-Benefit Analysis Of Novel Access Modes: A Case Study In The San Francisco Bay Area, Caroline Rodier, Andrea Broaddus, Miguel Jaller, Jeffery Song, Joschka Bischoff, Yunwan Zhang

Mineta Transportation Institute

The first-mile, last-mile problem is a significant deterrent for potential transit riders, especially in suburban neighborhoods with low density. Transit agencies have typically sought to solve this problem by adding parking spaces near transit stations and adding stops to connect riders to fixed-route transit. However, these measures are often only short-term solutions. In the last few years, transit agencies have tested whether new mobility services, such as ridehailing, ridesharing, and microtransit, can offer fast, reliable connections to and from transit stations. However, there is limited research that evaluates the potential impacts of these projects. Concurrently, there is growing interest in …

Promoting Transit-Oriented Developments By Addressing Barriers Related To Land Use, Zoning, And Value Capture, Shishir Mathur, Aaron Gatdula

Mineta Transportation Institute

This study advances land use, transportation planning, and public finance research by identifying: a) the various land use, zoning, and value capture-related barriers to the construction of transit-oriented developments (TODs); and b) the major strategies that are commonly used or could be used to address these barriers. The value capture (VC) tools include joint development projects, tax increment financing, special assessments, lease/sale of land or air rights, and impact fees. The research finds that while a large proportion of jurisdictions across the US have TODs, land use, zoning, and VC-related barriers often impede their construction. Most transit agencies are not …

Characteristics Of Effective Metropolitan Areawide Public Transit: A Comparison Of European, Canadian, And Australian Case Studies, Michelle Derobertis, Christopher E. Ferrell, Richard W. Lee, John M. Eells

Mineta Transportation Institute

This research project investigates the replicable characteristics, policies, and practices of successful metropolitan areawide public transportation networks that contribute to high usage and make transit an effective competitor to the private motor vehicle. The research method involves the qualitative and quantitative analysis of ten international (non-U.S.) case studies. The principal methods employed were web-based research and data collection, as well as telephone interviews with transit agency staff or regional planners as needed. The case studies were limited to developed western countries with similar metropolitan conditions to those in the United States.

This research focuses on key characteristics of highly effective …

Solving The First Mile/ Last Mile Problem: Electric Scooter And Dockless Bicycles Are Positioned To Provide Relief To Commuters Struggling With A Daily Commute, Kelly Grosshuesch

William & Mary Environmental Law and Policy Review

Commuters in cities across the United States struggle to find ease in their daily commute. Public transportation no longer provides residents with an adequate and reliable source of transportation.1 For many commuters, getting to and from nodes of public transportation is difficult and a deterrent from using public or shared transportation instead of driving.2 This, therefore, increases vehicle congestion and car emissions in cities. While multiple new technologies and innovations have emerged to attempt to help commuters with the trip to and from public transportation, most have fallen short.3 But two new innovations that have gained major popularity among consumers, …

Full Potential Of Future Robotaxis Achievable With Trip-Based Subsidies And Fees Applied To The For-Hire Vehicles Of Today, John Niles

Mineta Transportation Institute

As described by Grush and Niles in their textbook, The End of Driving: Transportation Systems and Public Policy Planning for Autonomous Vehicles, there are two distinct market states for the future of automobility as vehicles become increasingly automated. The first, Market-1, is comprised of all vehicles that are manufactured and sold to private owners and used as household vehicles. This private consumer fleet will—through automated driver assistance systems (ADAS)—be increasingly capable of hands-off operation, even self-driving in certain environments such as limited-access expressways. The second category, Market-2, represents all the vehicles made expressly for the service market, i.e., roboshuttles and …

Value Capture To Fund Public Transportation: The Impact Of Warm Springs Bart Station On The Value Of Neighboring Residential Properties In Fremont, Ca, Shishir Mathur

Mineta Transportation Institute

This study estimates households’ willingness to pay for single-family houses and condominiums/townhouses located within 2 miles of Warm Springs (WS) BART Station in Fremont, CA. The study finds that, compared to the houses sold in the referent category (2 to 5 miles away and sold during the pre-project-announcement period of 2000-2001), an average-priced single-family house within two miles of the WS BART Station was higher in price by 9% to 15%. The total property value increment for the single-family houses is large enough to fund the $802 million Warm Springs BART Extension Project cost five times over.

Older Adults’ Perceptions Regarding Transportation Services In San Jose, Ca: Access, Barriers, And Innovations, Deborah Bolding

Mineta Transportation Institute

The purpose of this study was to examine the perceptions of older adults concerning barriers to the use of public transportation, to identify programs and services that best meet transportation needs, and to obtain suggestions for improvements or innovations in order to enable them to engage more fully in their community. Four focus groups, with a total of 25 participants, were held in three locations in San Jose, CA. While the participants were able to use public transportation to access shopping, medical services and other destinations, they expressed concerns related to physical barriers, frequency of services, the behavior of some …

2018 Census Of California Water Transit Services, Richard M. Kos, Nicholas Frey, Mehedi Chowdhury

Mineta Transportation Institute

The U.S. Bureau of Transportation Statistics conducts a nationwide census of ferry boat operators for the U.S. Department of Transportation and the collected information is used for statistical purposes. The Caltrans Division of Local Assistance has been asked by the Federal Highway Administration (FHWA) to gather data regarding ferry operations under the Moving Ahead for Progress in the 21st Century Act (MAP-21). MAP-21 includes a new formula program for ferry boats and ferry terminal facilities eligible under 23 USC 129(c) which authorizes federal participation in toll roads, bridges, tunnels, and ferries. FHWA has asked that Caltrans assure the ferry boat …

The Changing Role Of Public-Private Partnerships In Urban Transportation: A Case Study Of The Rise Of P3s In Denver, Co, Sylvia Arriaga Brady

Electronic Theses and Dissertations

This research examines the expanding role of public-private partnerships (PPPs or P3s) in Denver metro transportation projects in three areas: (1) innovative funding and financing of transit infrastructure projects, (2) the partnerships between freight and passenger rail services, and (3) emerging collaborations of local governments, transit agencies, and transportation network companies (TNCs).

The purpose of the first study was to examine the recent use of P3s in the Denver Regional Transportation District's (RTD) FasTracks program, a 2004 voter-approved $4.7 billion transit expansion program. After a shortfall in funding, RTD partnered with several private consortia to enable the FasTracks program to …

Automated Vehicles Have Arrived: What's A Transit Agency To Do?, John Niles

Mineta Transportation Institute

Ongoing innovations in automated and connected road vehicles create a path of radical transformation of personal mobility, the automotive industry, trucking, public transit, the taxi industry, urban planning, transportation infrastructure, jobs, vehicle ownership, and other physical and social aspects of our built world and daily lives.

In considering automated vehicle (AV) deployments and their cost, as well as the changes in traffic volume, congestion, rights of way, and the complexities of mixed fleets with both automated and non-automated vehicles, the time frame of impacts can only be surmised.

Still, it is worth considering a framework for understanding and managing the …

Improving Demand Modeling In California's Rail Transit System, Rui Liu

Mineta Transportation Institute

This paper analyzes urban rail-fare elasticity and compares the results across four California transit systems. A method of Internet search is adopted to collect monthly transit-fare records from 2002 to 2013. This paper contributes towards improving demand modeling for public transit using more precise and monthly data and applies econometric techniques involving autoregressive integrated moving average (ARIMA) and panel data models. Results show that demand for public transit in California is very inelastic. Any ridership promotion policy may have a heterogeneous impact across transit systems.

What Do Americans Think About Federal Tax Options To Support Public Transit, Highways, And Local Streets And Roads? Results From Year Eight Of A National Survey, Asha Weinstein Agrawal, Hilary Nixon

Mineta Transportation Institute

This report summarizes the results of the eighth year of a national random-digit-dial public opinion poll asking 1,201 respondents if they would support various tax options for raising federal transportation revenues, with a special focus on understanding support for increasing revenues for public transit. Ten specific tax options tested were variations on raising the federal gas tax rate, creating a new mileage tax, and creating a new federal sales tax. Other questions probed perceptions related to public transit, including knowledge and opinions about federal taxes to support transit. In addition, the survey collected data on standard sociodemographic factors, travel behavior …

Performance Measures To Assess Resiliency And Efficiency Of Transit Systems, Hani Nassif, Kaan Özbay, Devajyoti Deka, Peng Lou, Chaekuk Na, Sandeep Mudigonda, Yuan Zhu, Ender Faruk Morgul, Bekir Bartin, Ayman El-Awar

Mineta Transportation Institute

Transit agencies are interested in assessing the short-, mid-, and long-term performance of infrastructure with the objective of enhancing resiliency and efficiency. This report addresses three distinct aspects of New Jersey’s Transit System: 1) resiliency of bridge infrastructure, 2) resiliency of public transit systems, and 3) efficiency of transit systems with an emphasis on paratransit service.

This project proposed a conceptual framework to assess the performance and resiliency for bridge structures in a transit network before and after disasters utilizing structural health monitoring (SHM), finite element (FE) modeling and remote sensing using Interferometric Synthetic Aperture Radar (InSAR). The public transit …