Transportation Commons^™

Characteristics Of Transitions In Freeway Traffic, Robert L. Bertini, Soyoung Ahn

Civil and Environmental Engineering Faculty Publications and Presentations

This research seeks to understand the characteristics of transitions as freeway traffic changes from one state to another. This study addresses the features of two types of transitions; transitions near a merge and transitions along shock waves during the onsets and dissipations of queues at several freeway sites.

Individual vehicle trajectory data were analyzed for studying the transitions near a merge. The length of a transition zone was measured by analyzing the spatial changes in flow, density and speed along kinematic waves near a merge. It was found that the length of transition in terms of flow, density and speed …

Empirical Observation Of The Impact Of Traffic Oscillations On Freeway Safety, Christopher M. Monsere, Soyoung Ahn

TREC Final Reports

Traffic oscillations are typical features of congested traffic flow that are characterized by recurring decelerations followed by accelerations (stop-and-go driving). The negative environmental impacts of these oscillations are widely accepted, but their impact on traffic safety has been debated. This report describes the impact of freeway traffic oscillations on traffic safety. This study employs a matched case-control design using high resolution traffic and crash data from a freeway segment. Traffic conditions prior to each crash were taken as cases, while traffic conditions during the same periods on days without crashes were taken as controls. These were also matched by presence …

Regional Transportation And Land Use Decision Making In Metropolitan Regions, National Policy Consensus Center

National Policy Consensus Center Publications

In 2010, an interdisciplinary team from the National Policy Consensus Center at Portland State University and the Department of Planning, Public Policy and Management at the University of Oregon conducted a study examining the arrangements and mechanisms for integrating land use and transportation in metropolitan regions and assessing these arrangements based on current practice and future potential. The four case study regions were: Portland, Oregon; Puget Sound, WA; San Diego, CA, and Denver, CO.

The methods used in this study included a research forum held in September, 2010 in Portland, Oregon to share findings, discuss implications, identify lessons learned and …

Customer Satisfaction Index Of Singapore 2010: Q2 Results, Customer Satisfaction Index Of Singapore 2010: Full Year Overview

Research Collection Institute of Service Excellence (2007-2024)

The Institute of Service Excellence at Singapore Management University rolled out the Customer Satisfaction Index of Singapore for companies in 8 key economic sectors in 2007. 2010 marks the introduction of a quarterly measure-and-release system. Each quarter, end-users of companies from two economic sectors are surveyed. The results are estimated and analysed for release in the same quarter. The national score will be released in the first quarter of the following year. Sectors measured in the second quarter of 2010 are Transportation & Logistics and Education. CSISG company scores draw upon face-to-face interviews with consumers of the companies’ products and …

Sustainable Urban Transport: The Issue Of Equity In The Emerging Bric Countries, Tamara Tavares

All Theses

Although sustainable frameworks for transportation have been widely discussed in the transportation planning field in recent decades, the issue of equity in transportation systems is still relatively unexplored in comparison to the other pillars of sustainability. Globally, the concept of equity gains different nuances in developed and developing countries, and have yet new implications when considering fast emerging nations. The objective of this paper is to investigate how transit policies in fast emerging economies are used to distribute equitable access to benefits and opportunities; and to derive lessons that can orient future cohorts of emerging cities and countries to use …

Program Evaluation Of A Community-Based Door-Through-Door Medical Escort Service, Lauren A. Martin

Gerontology Institute Publications

This report summarizes the program evaluation findings of a Boston-based organization’s Medical Escort program. This “door-through-door” service strives to provide medical transportation, physical assistance, and emotional support to elders on their way to the doctor’s office, during medical appointments and on the way back home again. By offering added assistance the program attempts to remove environmental barriers associated with access to health care. This evaluation combines previously collected program statistics with surveys (32) from program volunteers and phone interviews (78) with recipients.

Funding The Way To Work: Transportation Policies With Provisions For Low-Wage Workers, Ronald Combs

All Theses

Adequate access to employment is a primary factor in providing a means to self-sufficiency for disadvantaged populations. In order to secure and retain employment, people must enjoy a degree of mobility.
The Job Access and Reverse Commute (JARC) program enhances mobility for low-wage workers and low-income individuals by offering federal funding for locally planned and developed access projects. Funding for JARC projects is a combination of federal and local funding, with local funding derived from local sources, such as dedicated taxes, other local-level government-funded programs for disadvantaged populations, businesses or general accounts.
The objective of this research is to identify …

Are Distracted Drivers Aware That They Are Distracted?: Exploring Awareness, Self-Regulation, And Performance In Drivers Performing Secondary Tasks, Matthew Crisler

All Dissertations

Research suggests that driving while talking on a mobile telephone causes drivers not to respond to important events but has a smaller effect on their lane-keeping ability. This pattern is similar to research on night driving and suggests that problems associated with distraction may parallel those of night driving. Here, participants evaluated their driving performance before and after driving a simulated curvy road under different distraction conditions. In experiment 1 drivers failed to appreciate their distraction-induced performance decrements and did not recognize the dissociation between lane-keeping and identification. In Experiment 2 drivers did not adjust their speed to offset being …

The Boulevard Study: From Arterial To Asset -- Examining The Role Of The Multi-Way Boulevard In Coordinated Transportation And Land Use Planning, Mark L. Gillem

TREC Final Reports

Cities that were once considered the most-desired places to live or for businesses to locate are now seeking ways to unclog their increasingly congested roadways and regain their quality of life. U.S. Department of Transportation Strategic Plan Background Cities across the U.S. that are struggling with congestion resort to remedies that are increasingly difficult to implement. Adding capacity is a more challenging proposition given limited land availability, greater environmental constraints, and fiscal barriers. Replacing individual trips with transit has seen limited success and can typically only be justified at greater levels of density than many communities currently support. Multiway boulevards …

Oregon Freight Data Mart, Miguel A. Figliozzi, Robert Bertini

TREC Final Reports

Increasing freight volumes are adding pressure to the Oregon transportation system. Monitoring the performance of the transportation system and freight movements is essential to guarantee the economic development of the region, the efficient allocation of resources, and the quality of life of all Oregonians. Freight data is expensive to collect and maintain. Confidentiality issues, the size of the datasets, and the complexity of freight movements are barriers that preclude the easy access and analysis of freight data. Data accessibility and integration is essential to ensure successful freight planning and consistency across regional partner agencies and planning organizations. In relation to …

French Automobiles And The Chinese Boycotts Of 2008: Politics Really Does Affect Commerce, James Prieger, Wei-Min Hu, Canhui Hong, Dongming Zhu

School of Public Policy Working Papers

We explore the economic impact of boycotts of French automobiles in China during the time of the 2008 Beijing Olympics. Conditions were favorable for a boycott, enabling Chinese consumers to overcome the collective action problems that can prevent boycott success and other voluntary contributions to public goods. We use brand and model level data in a difference-in-difference specification to investigate the boycotts’ effects on sales. A robust pattern of large impacts emerges: sales of French automobile brands fell 25-33% or more. Consumers substituted mostly toward Chinese and other Asian cars. The sales of the French models did not experience similar …

Study On Optimization Of Container Stowage Based On Pre-Stowage Operation, Fei Gu

World Maritime University Dissertations

No abstract provided.

The Study Of Routes Selection In Intermodal Transportation, Qian Liu

World Maritime University Dissertations

No abstract provided.

The Research On Site Selection Of Dry Port Cluster Of Shanghai Port, Zhen Chen

World Maritime University Dissertations

No abstract provided.

Reasonable Number Of Issuing Original Bill Of Lading, Zhongming Ren

World Maritime University Dissertations

No abstract provided.

The Research On The Feasibility Of N Company's Chinese Ports Investment Project, Junhua Shen

World Maritime University Dissertations

No abstract provided.

The Impact Of The Ningbo-Hangzhou Bay Cross-Sea Bridge On The Economic Development Of The Port Of Shanghai And The Port Of Ningbo, Fanfan Zhang

World Maritime University Dissertations

No abstract provided.

Case Study Of Cold Chain Logistics Business Of Third Party Logistics Company, Han Bao

World Maritime University Dissertations

No abstract provided.

Research On The Competitiveness Of China Hn Chemical Shipping Company, Yue Luan

World Maritime University Dissertations

No abstract provided.

Research On Distribution Program Of Food Cold-Chain Logistics In Bright Speed Fresh Logistics Company, Zexin Xu

World Maritime University Dissertations

No abstract provided.