Transportation Commons^™

Towards Data And Solution-Focused Approaches For Homeless Populations On Publictransit, Anne Nordberg, Jaya Davis, Stephen Mattingly, Nithisha Gudipati, Ebonie Kinney, Hadiisha Butts

TREC Final Reports

People experiencing homelessness frequently rely on public transit systems and facilities as more than a mode of transportation to needed services, but also as safe shelters from weather and danger. This is a challenge for many transit agencies and impacts transit employees and passengers. Dallas and the surrounding counties have the largest homeless population in Texas, and they utilize the services of the Dallas Area Rapid Transit (DART) that serves 220,000 people per day in Dallas County and 12 surrounding counties. While there is much research focused on people experiencing homelessness, there are gaps in understanding how this population utilizes …

Do Travel Costs Matter For Persons With Lower Incomes? Using Psychological And Social Equity Perspectives To Evaluate The Effects Of A Low-Income Transit Fare Program On Low-Income Riders, Katharine Mcmahon, Morgan Taylor, Liu-Qin Yang, Liming Wang, Aaron Golub, Greg Townley

TREC Final Reports

Objective: Access to transit can deliver a host of benefits to the riders and to the region. Previous research aiming to study these benefits has primarily relied on data collected from the opening of new routes or transit systems and focused on the general population. Little is known how low-income riders (LIR) react and benefit in response to when the cost barrier to access to transit is removed. With an intention to increase ridership while addressing the needs of transit-dependent riders in the region, TriMet (Portland, OR) expanded the Honored Citizens Program (HCP) in July 2018 to include low-income …

Effectiveness Of Rectangular Rapid Flashing Beacons (Rrfbs) In Small And Rural Communities, Dana Rowangould, James Sullivan, Parsa Pezeshknejad

University of Vermont Transportation Research Center

Ensuring the safety of pedestrians and cyclists in rural and small communities is becoming increasingly important as planners seek to encourage active travel and eliminate traffic-related injuries and fatalities, consistent with Vision Zero. One area of focus is the protection of vulnerable road users such as pedestrians, who face a significant risk of injury or death in a traffic collision. The risks to pedestrians are particularly high when crossing roadways in high-risk areas such as high-speed and low pedestrian-volume rural roads and between intersections where drivers may not expect them. One concern in rural communities is that pedestrians may face …

Pedestrian Behavior Study To Advance Pedestrian Safety In Smart Transportation Systems Using Innovative Lidar Sensors, Taylor Li, Sirisha M. Kothuri, Katherine L. Keeling, Xianfeng Terry Yang, Farzana R. Chowdhury

TREC Final Reports

Pedestrian safety is critical to improving walkability in cities. Although walking trips have increased in the last decade, pedestrian safety remains a top concern. In 2020, 6,516 pedestrians were killed in traffic crashes, representing the most deaths since 1990 (NHTSA, 2020). Approximately 15% of these occurred at signalized intersections where a variety of modes converge, leading to the increased propensity of conflicts. Current signal timing and detection technologies are heavily biased towards vehicular traffic, often leading to higher delays and insufficient walk times for pedestrians, which could result in risky behaviors such as noncompliance. Current detection systems for pedestrians at …

Rural Gentrification And The Spillover Effect: Integrated Transportation, Housing, And Land Use Challenges And Strategies In Gateway Communities, Danya Rumore, Philip Stoker

TREC Final Reports

Small towns and cities near national parks, public lands, and other natural amenities throughout the West are experiencing rapid growth and increased visitation. These “gateway communities” comprise a significant portion of the rural West, constituting about 31% of all communities and more than 60% of those under 25,000 people. Our prior NITC-funded research shows that growth and increased tourism create a range of “big city challenges” for gateway communities, particularly a significant increase in housing prices, which pushes the local workforce to outlying areas and other rural communities. As a result, despite being small towns, many developed gateway communities have …

Final Report: California Tribal Nations Transportation Planning Needs Assessment Study, Seetha Reddy, Ashley Parker, David Reinke, Kaely Colligan

Mineta Transportation Institute Publications

The Tribal Transportation Planning Needs Assessment Study was a collaborative project conducted by Caltrans and the Mineta Transportation Institute, San Jose State University. The primary goal of the project was to identify the current state of transportation planning activities and partnerships within Tribal governments in California, so that Caltrans can meaningfully engage more actively with Tribal governments early in the planning process and better meet the transportation needs of Tribal communities. The study focused on the 109 federally recognized Tribal Nations in California, and collected data through a survey questionnaire. The key task undertaken by the study team was to …

Evaluating Automated Truck Platoon (Atp) Deployment For The Los Angeles–Inland Empire Trade Corridor Enhancement, Shailesh Chandra, Aastha Chaudhary, Prakhar Srivastava, Jose Torres-Aguilera

Mineta Transportation Institute Publications

The California Freight Mobility Plan 2020 lists the Los Angeles-Inland Empire trade corridor region as a prominent industrial hub experiencing an increase in freight flows. The California Freight Mobility Plan also regards automated truck platoon (ATP) as an emerging opportunity to minimize congestion on the trade corridor routes. Percentage change in accessibility from 2022 (“without” ATP) to 2040 (“with” ATP) is calculated for the eighteen industry sectors of the Los Angeles-Inland Empire trade corridor. The application of the accessibility formulation was carried out with data on travel time from I-710 and I-10 within Los Angeles County. The findings suggest that …

Attention-Based Data Analytic Models For Traffic Flow Predictions, Kaushal Kumar, Yupeng Wei

Mineta Transportation Institute Publications

Traffic congestion causes Americans to lose millions of hours and dollars each year. In fact, 1.9 billion gallons of fuel are wasted each year due to traffic congestion, and each hour stuck in traffic costs about $21 in wasted time and fuel. The traffic congestion can be caused by various factors, such as bottlenecks, traffic incidents, bad weather, work zones, poor traffic signal timing, and special events. One key step to addressing traffic congestion and identifying its root cause is an accurate prediction of traffic flow. Accurate traffic flow prediction is also important for the successful deployment of smart transportation …

Planning, Preserving, And Increasing Accessibility: A Reflection On Going “Car-Free”, Abigail J. Weizer

City and Regional Planning

This paper studies the accessibility of car-free areas to those with mobility impairments by examining three car-free and car-lite experiments in California. Whether slowly converted to car-free with long-term, careful planning, or expeditiously changed to car-free during the COVID-19 pandemic, these three car-free experiments show the shortcomings of planning for accessibility in car-free spaces, and how instead of improving accessibility, current planning practice often hinders it. This paper offers a deep-dive into the drawbacks and benefits of going car-free and the ethical and legal reasons why urban planners, designers, and policymakers must consider the accessibility of a space before planning …

Vehicle Rebalancing In A Shared Micromobility System With Rider Crowdsourcing, Ziliang Jin, Yulan Wang, Yun Fong Lim, Kai Pan, Zuo-Jun Max Shen

Research Collection Lee Kong Chian School Of Business

Problem definition: Shared micromobility vehicles provide an eco-friendly form of short-distance travel within an urban area. Since customers pick up and drop off vehicles in any service region at any time, such convenience often leads to a severe imbalance between vehicle supply and demand in different service regions. To overcome this, a micromobility operator can crowdsource individual riders with reward incentives in addition to engaging a third-party logistics provider (3PL) to relocate the vehicles. Methodology/results: We construct a time-space network with multiple service regions and formulate a twostage stochastic mixed-integer program considering uncertain customer demands. In the first stage, the …

Managing The Personalized Order-Holding Problem In Online Retailing, Shouchang Chen, Zhenzhen Yan, Yun Fong Lim

Research Collection Lee Kong Chian School Of Business

Problem definition: A significant percentage of online consumers place consecutive orders within a short duration. To reduce the total order arrangement cost, an online retailer may consolidate consecutive orders from the same consumer. We investigate how long the retailer should hold the consumer’s orders before sending them to a third-party logistics provider (3PL) for processing. In this order-holding problem, we optimize the holding time to balance the total order arrangement cost and the potential delay in delivery. Methodology/results: We model the order-holding problem as a Markov Decision Process. We show that the optimal order-holding decisions follow a threshold-type policy that …

Evaluation, Comparison, And Improvement Recommendations For Caltrans Financial Programming Processes And Tools, Wenbin Wei, Nigel Blampied, Raajmaathangi Sreevijay

Mineta Transportation Institute Publications

The California Transportation Improvement Program System (CTIPS) is the main tool used by Caltrans’ Division of Financial Programming to support the business of transportation programming. It is a multi-agency joint-use project programming database system applied to develop and manage various state and federal transportation programming documents. The goal of this project is to evaluate CTIPS and explore various new options that will maintain the current functionality of CTIPS, meet legislative guidelines for ADA compliance, ensure security of the system, and have sufficient scalability and capabilities for integration with other systems in the future. The research is based on the review …

Trade And Transportation Talent Pipeline Blueprints: Building Universityindustry Talent Pipelines In Colleges Of Continuing And Professional Education, Tyler D. Reeb, Stacey Park

Mineta Transportation Institute Publications

The rapid adoption of transformational technologies along with other economic and cultural shifts, have created a gap between workers and the skills and knowledge necessary for in-demand occupations. Trade and Transportation Talent Pipeline Blueprints: Building University-Industry Talent Pipelines in Colleges of Continuing and Professional Education identifies the steps required to build talent pipelines that target in-demand trade and transportation occupations requiring specific degrees, certificates, and non-credit professional development. This report provides a literature review and labor market data analysis. It also includes documentation of methodology in planning a pilot program for Colleges of Professional and Continuing Education housed within each …

Lewisburg Bikeability Report 2022, Morgan Powell, Shaunna Barnhart, Taylor Lightman

Student Project Reports

No abstract provided.

Analysis Of Freight Movements In The San Joaquin Valley, Aly Tawfik, Utsav Shah

Mineta Transportation Institute Publications

Freight transportation plays a primary role in supply chains, costs, and availability of goods and is a major part of the economy. This study identifies, assesses, and utilizes different data sources to uncover and understand the patterns and movements of different types of freight in the San Joaquin Valley’s (SJV's) different counties. The San Joaquin Valley region consists of eight counties: San Joaquin, Stanislaus, Merced, Madera, Fresno, Kings, and Tulare. This research explored some major datasets with freight information, such as Global Trade Atlas (GTA), Port Imports and Exports Reporting Systems (PIERS), and Streetlight data insights for the year 2019 …

Analysis Of The Emerging Pilot Workforce, James Birdsong, Kurt Reesman

National Training Aircraft Symposium (NTAS)

The pilot workforce grew by approximately 20,000 pilots between 2011 – 2019 before shedding almost 6,500 jobs in 2020 due to COVID-19. Long-term forecasts predict industry recovery and growth and the need for robust pilot hiring since approximately 50% of today’s pilot workforce will meet the mandatory retirement age within 15 years.

The current workforce consists of four generations, with the youngest (Generation Z) just beginning to join the airline ranks. The oldest generation (Baby Boomers) will be exiting the workforce within ten years, leaving three generations (Generations X, Y, and Z), two of which have spent their entire lives …

Safety Of Domestic Ferries: A Scoping Study Of Seven High-Risk Countries, Anish Hebbar, Serdar Yildiz, Nadhir Kahlouche, Jens-Uwe Schröder-Hinrichs

Reports

Ferry accidents are fairly common globally, causing countless deaths and injuries. Whereas ferry transportation is an integral part of the domestic transport infrastructure in many countries, particularly archipelagic countries such as Indonesia and the Philippines, river deltaic countries like Bangladesh, countries with extensive riverine systems such as the Democratic Republic of the Congo, Nigeria and Senegal, or even a combination of great lakes, rivers and archipelago such as Tanzania, these countries are experiencing a high number of ferry accidents and fatalities over the past two decades and, therefore, considered high-risk countries in the ferry transport sector. International community continuously seeks …

Identifying The Main Causes For Support Of Crime Control Theater Forms, And Understanding How To Correct The Public’S Perception, Erisjames M. Elliott

CMC Senior Theses

Much research has been completed on the forms of crime control theater (CCT), and the impact that the existence of CCT laws have on society. Research on CCT laws has shown that they are definitively unsuccessful in providing the safety they were created to provide. This thesis will utilize completed research to explain the main psychological phenomena holding people back from decreasing their support for CCT laws. It will also describe proven methods of correcting misinformation in order to change the perceptions of people who support crime control theater laws, and provide suggestions for how research should be continued.

Evaluation Of Left Shoulder As Part-Time Travel Lane Design Alternatives And Transportation Management Center Staff Training Module Development, Zhuohang Deng, Zhiliang Luo, Neil Hockaday, Ahmed Farid, Anurag Pande

Mineta Transportation Institute Publications

Permanent capacity expansion, such as adding new lanes, is no longer a viable strategy to address traffic congestion in California; hence, ITS (Intelligent Transportation System) strategies, such as part-time use of the shoulder as a travel lane, need to be explored. The use of the shoulder as a travel lane during peak traffic hours has limited applications in the US, and most use the right shoulder as a part-time travel lane even though either the right or left shoulder (but not both) may be used. Caltrans District 5 is exploring the use of Left Shoulder as a Part-time Travel Lane …

The Role Of Information And Education On Modifying Support For Gas Tax Alternatives Using An Informed Choice Questionnaire, Clare Nelson, Gregory Rowangould

University of Vermont Transportation Research Center

In the United States, transportation fuel excise taxes commonly referred to as the “gas tax” provide a large share of funding to state agencies for transportation maintenance and construction projects. The revenue generating capacity of the gas tax is threatened by increasing vehicle fuel efficiency, electric vehicles adoption and inflation. Alternative funding schemes are necessary, but public acceptance of tax changes is low. We surveyed residents of Vermont, Maine, and New Hampshire to gauge understanding of and support for a mileage-based user fee and a flat fee as potential replacements for the current gas tax and the potential to modify …