Transportation Commons^™

Community Transportation Academy: Course Curriculum And Implementation Handbook, Nathan Mcneil, Keith Bartholomew

TREC Final Reports

A Community Transportation Academy (CTA) is a course that harnesses the knowledge, technical expertise and passions of practicing transportation professionals in a city to immerse a cohort of interested and dedicated community members in transportation issues over a two to three month curriculum.

The CTA curriculum was developed by drawing from the Portland Traffic and Transportation (PTT or Portland CTA) course, along with the Wasatch Transportation Academy (WTA or Wasatch CTA, which was inspired by the Portland course). Planning academy courses in cities around the country are also good models to look to for how to structure and operate such …

Towards An Optimal Bus Frequency Scheduling: When The Waiting Time Matters, Songsong Mo, Zhifeng Bao, Baihua Zheng, Zhiyong Peng

Research Collection School Of Computing and Information Systems

Reorganizing bus frequencies to cater for actual travel demands can significantly save the cost of the public transport system. This paper studies the bus frequency optimization problem considering the user satisfaction. Specifically, for the first time to our best knowledge, we study how to schedule the buses such that the total number of passengers who could receive their bus services within the waiting time threshold can be maximized. We propose two variants of the problem, FAST and FASTCO, to cater for different application needs and prove that both are NP-hard. To solve FAST effectively and efficiently, we first present an …

Learning To Solve Multiple-Tsp With Time Window And Rejections Via Deep Reinforcement Learning, Rongkai Zhang, Cong Zhang, Zhiguang Cao, Wen Song, Puay Siew Tan, Jie Zhang, Bihan Wen, Justin Dauwels

Research Collection School Of Computing and Information Systems

We propose a manager-worker framework (the implementation of our model is publically available at: https://github.com/zcaicaros/manager-worker-mtsptwr) based on deep reinforcement learning to tackle a hard yet nontrivial variant of Travelling Salesman Problem (TSP), i.e. multiple-vehicle TSP with time window and rejections (mTSPTWR), where customers who cannot be served before the deadline are subject to rejections. Particularly, in the proposed framework, a manager agent learns to divide mTSPTWR into sub-routing tasks by assigning customers to each vehicle via a Graph Isomorphism Network (GIN) based policy network. A worker agent learns to solve sub-routing tasks by minimizing the cost in terms of both …

Strategizing Battery Swap Service: Self-Operation Or Authorization?, Zhaojun Yang, Quanlong Lei, Jun Sun, Xu Hu, Yali Zhang

Information Systems Faculty Publications

Electric vehicle (EV) charging is still time-consuming compared with traditional vehicle refueling, making many consumers hesitant to make the switch. As a solution, battery swapping allows EVs to get energized within minutes. As economies like China embrace the emerging battery swap market, relevant automakers face strategic choices between self-operation and authorization. This study establishes game-theoretic models of a duopoly EV market comprising two automakers and a battery swap market involving an additional third-party operator. Each automaker may run its own battery swap service entirely or license at least part of it to the third-party operator. The results suggest that authorization …

Routes To Lower Greenhouse Gas Emissions From Freight Transportation In The City Of San José, Serena Alexander, Kyle Laveroni, Maxwell Friedman, Janani Thiagrajan

Mineta Transportation Institute

Freight represents approximately 30% of all transportation-related emissions in the U.S., but local climate action plans (CAPs) and freight plans often place limited emphasis on freight emissions reduction strategies. The objective of this report is to examine and present strategies for the City of San José, California to reduce GHG emissions from freight. The authors conducted a geospatial analysis of freight data related to San José, and an analysis of relevant literature and successful freight reduction strategies implemented globally. The report also provides key objectives and generalized strategies to reduce GHG emissions from freight as well as specific recommendations for …

Implication Of Model Regulations On Domestic Ferry Safety On China's Ferry Safety Legislation And Maritime Safety Administration’S Supervision, Yi Pang

World Maritime University Dissertations

No abstract provided.

Study On Ships’ Routeing System At Yuxingnao Waters Of Zhoushan Coastal, Qinglong Hao

World Maritime University Dissertations

No abstract provided.

Research On Uncertainties And Challenges Of Cyber Security In Maritime Industry, Qianrong Chen

World Maritime University Dissertations

No abstract provided.

A Study On Legal Issues Of Unmanned Ship Maritime Regulation, Qingbao Zhang

World Maritime University Dissertations

No abstract provided.

Transportation As A Barrier To Healthcare Access For Older Adults Of Low Socioeconomic Status, Yanira Barajas, Susan Macdermott, Jazminne Orozco Arteaga

Summer 2022 Virtual OTD Capstone Symposium

The older adult population of those in the age group 65+ is one of the fastest growing populations in the following years. This project sought to identify what barriers older adults of low socioeconomic status face when trying to access transportation to healthcare appointments. The project also sought to understand what barriers healthcare professionals saw when their senior clients tried using transportation as well as what opportunities occupational therapists have to address the barriers if any. There was a theme of disconnect which appeared between healthcare professionals and their senior clients across multiple healthcare disciplines. This project was able to …

A Mixed Method-Approach To Exploring Human Organ Trafficking And Its Policy Implications, Jeslyn Huynh

Dissertations (2016-Present)

Human organ trafficking, which involves the exploitation, coercion, illegally purchasing or selling of organs, has become a primary international concern. According to the United Nations, legally available organs for transplants only accommodate roughly 10% of the global industry demand. The shortage in organ supply means a new patient is added to the waiting list every 10 minutes worldwide even as 20 patients die every day in the United States alone waiting for an available organ. Previous researchers have found empirical support for significant relationships between human organ trafficking and its adverse globalized effects. Using primary and secondary data, the main …

Launching The Wasatch Transportation Academy, Nathan Mcneil, Keith Bartholomew, Matthew Ryan

TREC Final Reports

The “Community Transportation Academy” model seeks to break down the barriers for community members to participate in transportation decision-making processes. Since 1991, the Portland Traffic and Transportation Course has held at least one course each year, connecting Portland residents with top planners, engineers, and decision-makers from agencies working on transportation in the region, with the goal of conveying the factors professionals consider, ranging from technical considerations, legal and policy mandates, other tradeoffs, and how the community can engage with and influence decisions. This project sought to implement a transportation academy in the Salt Lake City region inspired by the Portland …

Fed-Ltd: Towards Cross-Platform Ride Hailing Via Federated Learning To Dispatch, Yansheng Wang, Yongxin Tong, Zimu Zhou, Ziyao Ren, Yi Xu, Guobin Wu, Weifeng Lv

Research Collection School Of Computing and Information Systems

Learning based order dispatching has witnessed tremendous success in ride hailing. However, the success halts within individual ride hailing platforms because sharing raw order dispatching data across platforms may leak user privacy and business secrets. Such data isolation not only impairs user experience but also decreases the potential revenues of the platforms. In this paper, we advocate federated order dispatching for cross-platform ride hailing, where multiple platforms collaboratively make dispatching decisions without sharing their local data. Realizing this concept calls for new federated learning strategies that tackle the unique challenges on effectiveness, privacy and efficiency in the context of order …

The Commuting Patterns Of Older Adults, Yen Cong Wong, Yan Er Tan, Grace Cheong

ROSA Research Briefs

This research brief uses data from the Singapore Life Panel (SLP) and provides a general description of the commuting patterns of older adults in November 2021. By outlining the latter, we aim to provide some indication of whether Singapore’s transport infrastructure adequately supports the commute needs of older adults and how older adults’ commute fares against the Land Transport Authority (LTA) of Singapore’s Land Transport Master Plan (LTMP). Key findings: 1. Self-owned car (32.8%) was the most preferred mode of transport, followed by the public bus (25.3%), MRT (24.4%) and walking (8.3%). 2. In terms of utilization, public bus (50.3%), …

Development Of Balanced Mix Design Quality Control Specifications Based On The Acceptance Limits Of Hma Performance Tests, Lucas Tameirao Abrantes

Open Access Theses & Dissertations

With the augmented use of recycled materials, recycling agents, modified binders, andwarm mix asphalt additives, several highway agencies including the Texas Department of Transportation (TxDOT), have considered methods to improve the durability and long-term performance of asphalt concrete (AC) mixes. The need for performance tests that could consistently evaluate the rutting and cracking potentials of AC mixes became crucial as the popularity of the Balanced Mix Design (BMD) concept has increased over the years. A concern now is related to the practicality of these tests for routine use in the process of quality control and quality assurance during the field …

Dynamic Stochastic Matching Under Limited Time, Aouad Ali, Omer Saritac

Research Collection Lee Kong Chian School Of Business

In centralized matching markets such as carpooling platforms and kidney exchange schemes, new participants constantly enter the market and remain available for potential matches during a limited period of time. To reach an efficient allocation, the "timing"of the matching decisions is a critical aspect of the platform's operations. There is a fundamental tradeoff between increasing market thickness and mitigating the risk that participants abandon the market. Nonetheless, the dynamic properties of matching markets have been mostly overlooked in the algorithmic literature. In this paper, we introduce a general dynamic matching model over edge-weighted graphs, where the agents' arrivals and abandonments …

Pathway To Promote Diversity Within Public Transit Workforce, Mehri Mohebbi, Sumita Raghuram, Ahoura Zandiatashbar

Mineta Transportation Institute

There are many aspects of the transportation industry that can be focused on, but the lack of resiliency is one of the most urgent. Enhancing resiliency and creative problem-solving is essential to the industry’s growth and survival. But it cannot happen without building a more diverse workforce. Women still make up a small fraction of transportation workers, and African American and Hispanic employees are even less represented. These disparities are increasingly pronounced in many senior positions, particularly in STEM fields. Meanwhile, the public transportation industry is experiencing a severe and worsening workforce shortage and many agencies have reported substantial difficulty …

“Tele-Commuting” During The Covid-19 Pandemic And Beyond: Unveiling State-Wide Patterns And Trends Of Telecommuting In Relation To Transportation, Employment, Land Use, And Emissions In Calif, Tianjun Lu, Jian-Yu Ke, Fynnwin Prager, Jose N. Martinez

Mineta Transportation Institute

Telecommuting, the practice of working remotely at home, increased significantly (25% to 35%) early in the COVID-19 pandemic. This shift represented a major societal change that reshaped the family, work, and social lives of many Californians. These changes also raise important questions about what factors influenced telecommuting before, during, and after COVID-19, and to what extent changes in telecommuting have influenced transportation patterns across commute modes, employment, land use, and environment. The research team conducted state-level telecommuting surveys using a crowd-sourced platform (i.e., Amazon Mechanical Turk) to obtain valid samples across California (n=1,985) and conducted state-level interviews among stakeholders (n=28) …

The Effects Of Flood Warning Information On Driver Decisions In A Driving Simulator Scenario, Katherine Rose Garcia

Psychology Theses & Dissertations

Flood warnings are a type of risk communication that alerts the public of potential floods. Flood warnings can be communicated through mobile devices and should convey enough information to keep the user safe during a flood situation. However, the amount of detail included in the warning, such as the depth of the flood, may vary. The purpose of this study was to: (a) extend our prior research on flood warnings by recreating the written driving scenarios into the driving simulator; (b) deepen the understanding of human decision-making in risky situations; and (c) investigate how to best inform drivers of floods …

Rideshare Practices In Developing Countries Vs Developed Countries, Francis Wambalaba

PSU Transportation Seminars

This project investigated strategies towards development, marketing and implementation of employer programs for reducing single occupancy vehicles to mitigate traffic congestion. It was guided by the following research questions: which socio-economic factors influence carpooling; how do environmental factors influence carpooling; and what are effective traffic management strategies for enhancing carpooling. The presentation will also strive to introduce the US context for purposes of perspective.