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Exploring The Contributions Of Local Health Departments In Land Use And Transportation Policy: Implications For Cross-Sector Collaboration, Meera Sreedhara, Karin V. Goins, Semra Aytur, Katie Heinrich, Jay Maddock, Stephenie C. Lemon 2017 University of Massachusetts Medical School

Exploring The Contributions Of Local Health Departments In Land Use And Transportation Policy: Implications For Cross-Sector Collaboration, Meera Sreedhara, Karin V. Goins, Semra Aytur, Katie Heinrich, Jay Maddock, Stephenie C. Lemon

Stephenie C. Lemon

Introduction: Transportation and land use policies can impact physical activity. Local health departments (LHDs) are encouraged to participate in land use and transportation policy processes, which are outside their traditional expertise. Cross-sector collaborations are needed, yet stakeholders’ perceptions of LHD involvement are not well-understood. This paper explores (1) the perceived value of LHD participation in transportation and land use decision-making and (2) potential contributions of LHDs to these processes among relevant stakeholders.

Methods: Qualitative data were analysed from 49 semi-structured interviews conducted in 2015 and 2016. Participants were professionals representing land use planning (n=13), transportation/public works (n=11 ...


Tracer-Mar: Technique For The Retrospective & Predictive Analysis Of Cognitive Errors Adapted To The Maritime Domain, Jens-Uwe Shröder-Hinrichs, Armando Graziano, Aditi Kataria, Gesa Praetorius 2017 World Maritime University

Tracer-Mar: Technique For The Retrospective & Predictive Analysis Of Cognitive Errors Adapted To The Maritime Domain, Jens-Uwe Shröder-Hinrichs, Armando Graziano, Aditi Kataria, Gesa Praetorius

WMU Papers in Maritime and Ocean Affairs

This guidebook is the first of a series of WMU Papers in Maritime and Ocean Affairs. It introduces the Human Error Identification technique TRACEr-Mar (Technique for the Retrospective and predictive Analysis of Cognitive Errors adapted to the Maritime Domain).

Modern socio-technical systems had witnessed a complex co-evolution and interaction of both social and technical aspects in the day-to-day reality. However, when an accident occurs in such complex systems, accident causation models always have to simplify the reality and may therefore be limited for fully understanding all the aspects involved in the failing of the maritime socio-technical system involved in that ...


Quality Control/Quality Assurance Testing For Joint Density And Segregation Of Asphalt Mixtures, R. Christopher Williams, Can Chen, Taha Ahmed, Hosin "David" Lee 2017 Iowa State University

Quality Control/Quality Assurance Testing For Joint Density And Segregation Of Asphalt Mixtures, R. Christopher Williams, Can Chen, Taha Ahmed, Hosin "David" Lee

R. Christopher Williams

Longitudinal joint quality control/assurance is essential to the successful performance of asphalt pavements and it has received considerable amount of attention in recent years. The purpose of the study is to evaluate the level of compaction at the longitudinal joint and determine the effect of segregation on the longitudinal joint performance. Five paving projects with the use of traditional butt joint, infrared joint heater, edge restraint by milling and modified butt joint with the hot pinch longitudinal joint construction techniques were selected in this study. For each project, field density and permeability tests were made and cores from the ...


Measuring The Impacts Of Social Media On Advancing Public Transit, Jenny H. Liu, Xuegang Ban 2017 Portland State University

Measuring The Impacts Of Social Media On Advancing Public Transit, Jenny H. Liu, Xuegang Ban

Jenny Liu

This project is a collaboration between Portland State University (PSU) and the Center for Infrastructure Transportation & Environment (CITE) at Rensselaer Polytechnic Institute seeking to develop performance measures for assessing the impacts of social media on promoting public transit. Revolutionary changes have occurred in the communication landscape, and there has been a rapid diffusion of social media use as a means of communicating transit information to the public. Significant resources are being directed to the use of social media in communication, yet little effort exists that measures the impacts of these popular vehicles of communication. Rarely studied is the role of social media in achieving the overarching goals of advancing the mission of transit agencies through increasing recruitment and retention of transit riders; increasing resources and customer satisfaction; addressing system issues, performance efficiency and effectiveness; and improving employee productivity and morale. There is a need to measure the impacts of social media and account for the cost effectiveness of its wide use as a means of communication in public transit agencies. This research intends to extend understanding about whether investments in social media tools effectively achieve their intended purposes. The goal of this project is to identify social media-related measures for public transit agencies that can comprehensively ...


Understanding Social Media Program Usage In Public Transit Agencies, Jenny H. Liu, Wei Shi, O. A. Elrahman, Xuegang Ban, Jack M. Reilly 2017 Portland State University

Understanding Social Media Program Usage In Public Transit Agencies, Jenny H. Liu, Wei Shi, O. A. Elrahman, Xuegang Ban, Jack M. Reilly

Jenny Liu

Social media has been gaining prominence in public transit agencies in their communication strategies and daily management. This study aims to better understand recent trends in social media usage in public transit agencies, to examine which agencies use what kind of social media programs for what purposes, and how they measure their programs. A survey was conducted of the top transit agencies in the nation, and results are examined through descriptive statistical analysis, correlation analysis and regression modeling. We found that while most agencies still lack clearly-defined goals and performance metrics to guide their social media development, many are increasing ...


China's Motorization Wave And The Place Of Emerging Technologies, Christopher Cherry 2017 University of Tennessee, Knoxville

China's Motorization Wave And The Place Of Emerging Technologies, Christopher Cherry

TREC Friday Seminar Series

E-bikes, E-Cars, Carshare, Bikeshare, and Micro-EVs in China have shaken up the traditional motorization pathways that have occurred in developing countries in the past. The combination of emerging vehicle technologies, urban and environmental constraints, and heavy-handed policy make China's motorization processes unique in the world—but how China motorizes has far-reaching impacts based on sheer volume of vehicles and population.

This seminar discusses the results of a six-year NSF CAREER project to explore China's motorization processes, combining behavioral and environmental modeling approaches to assess the impacts of emerging vehicle technologies on motorization and ultimately environmental sustainability. The focus ...


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 2017 San Jose State University

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 Publications

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 ...


Focusing On Equity In Regional Plans, Kristine M. Williams 2017 University of South Florida

Focusing On Equity In Regional Plans, Kristine M. Williams

TREC Project Briefs

Metropolitan planning organizations (MPOs) have long been required to consider the equity implications of their regional transportation plans and processes.


Measuring The Impacts Of Social Media On Advancing Public Transit, Jenny H. Liu, Xuegang Ban 2017 Portland State University

Measuring The Impacts Of Social Media On Advancing Public Transit, Jenny H. Liu, Xuegang Ban

TREC Final Reports

This project is a collaboration between Portland State University (PSU) and the Center for Infrastructure Transportation & Environment (CITE) at Rensselaer Polytechnic Institute seeking to develop performance measures for assessing the impacts of social media on promoting public transit. Revolutionary changes have occurred in the communication landscape, and there has been a rapid diffusion of social media use as a means of communicating transit information to the public. Significant resources are being directed to the use of social media in communication, yet little effort exists that measures the impacts of these popular vehicles of communication. Rarely studied is the role of social media in achieving the overarching goals of advancing the mission of transit agencies through increasing recruitment and retention of transit riders; increasing resources and customer satisfaction; addressing system issues, performance efficiency and effectiveness; and improving employee productivity and morale. There is a need to measure the impacts of social media and account for the cost effectiveness of its wide use as a means of communication in public transit agencies. This research intends to extend understanding about whether investments in social media tools effectively achieve their intended purposes.

The goal of this project is to identify social media-related measures for public transit agencies that can comprehensively ...


Breaking Barriers To Bike Share: Insights From Residents Of Traditionally Underserved Neighborhoods, Nathan McNeil, Jennifer Dill, John MacArthur, Joseph Broach, Steven Howland 2017 Portland State University

Breaking Barriers To Bike Share: Insights From Residents Of Traditionally Underserved Neighborhoods, Nathan Mcneil, Jennifer Dill, John Macarthur, Joseph Broach, Steven Howland

TREC Final Reports

Evidence has shown that higher income and white populations are overrepresented in both access to and use of bike share. Efforts to overcome underserved communities’ barriers to access and use of bike share have been initiated in a number of cities, including those working with the Better Bike Share Partnership (BBSP) to launch and test potentially replicable approaches to improve the equity outcomes. This report describes findings from a survey of residents living near bike share stations placed in underserved communities of select BBSP cities: Philadelphia, Chicago, and Brooklyn. These were neighborhoods targeted for focused outreach related to BBSP programs ...


Comparing Automated Shared Taxis And Conventional Bus Transit For A Small City, Louis A. Merlin 2017 Florida Atlantic University

Comparing Automated Shared Taxis And Conventional Bus Transit For A Small City, Louis A. Merlin

Journal of Public Transportation

This study compared two hypothetical transit scenarios with the current bus transit system for serving the transit passengers of Ann Arbor, Michigan, for a typical fall weekday in 2013. One scenario consists of an automated taxi system that allows only one rider at a time, and the other consists of a similar automated taxi system that allows ridesharing for up to four passengers. The two automated taxi scenarios were modeled on simulated transit passenger travel demand data via agent-based models. All three scenarios were then compared for their level of service, cost, greenhouse gas emissions, and congestion impacts. The automated ...


Understanding The Role Of Driver, Vehicle, Environment, And Policy Factors In Crash Injury Severity Among Older Adults In The United States, Chae Man Lee 2017 University of Massachusetts Boston

Understanding The Role Of Driver, Vehicle, Environment, And Policy Factors In Crash Injury Severity Among Older Adults In The United States, Chae Man Lee

Graduate Doctoral Dissertations

Driving is related to quality of life and health outcomes. Older drivers involved in car crashes have a higher risk of experiencing a severe injury or fatality. Understanding factors related to injury severity may identify points of intervention to promote road safety. The purpose of this study is to investigate how individual characteristics, vehicle elements, environmental elements, and driving licensing policy are associated with level of injury severity from no injury to fatal injury resulting from car crashes. Furthermore, this dissertation research utilizes the Geographic Information System (GIS) process to visualize the location of crashes and to identify the hot ...


Understanding Transportation In Urban China - Local Residents Vs Migrant Workers, Jenny H. Liu 2017 Portland State University

Understanding Transportation In Urban China - Local Residents Vs Migrant Workers, Jenny H. Liu

Jenny Liu

With rapid urbanization in China and other developing economies around the world, it has become imperative to understand household transportation behavior and expenditures in these urban areas. The objective of this study is to examine the differences in the determinants of household transportation expenditures within two very distinct populations in Chinese cities: local residents and migrant workers.

In order to craft policies or strategies promoting sustainable transportation or livability, it is essential to understand whether the drivers that push the migrant population towards spending more on transportation or owning bikes or motorbikes are similar to drivers for the rest of ...


Transportation Cost Index: A Comprehensive Performance Measure For Transportation And Land Use Systems And Its Application In Or, Fl, And Ut, Liming Wang, Jenny H. Liu 2017 Portland State University

Transportation Cost Index: A Comprehensive Performance Measure For Transportation And Land Use Systems And Its Application In Or, Fl, And Ut, Liming Wang, Jenny H. Liu

Jenny Liu

MAP-21 and state laws are placing increasing emphasis on using comprehensive transportation performance measures that include mobility, safety, economy, livability, equity, and environmental to guide transportation decision-making. One of the toughest challenges keeping DOTs and MPOs from adopting comprehensive measures in the decision process is the lack of performance measures allowing consistent comparison of multimodal performance over time and across geographic areas. This project advances a transportation cost index (TCI) initially proposed by Oregon DOT from a proof-of-concept stage to implementation and operational use at the state, MPO, and community levels. After pilot tests and early adoption in Oregon, we ...


Webinar: Economic Impacts From Bicycle And Pedestrian Street Improvements, Jenny H. Liu 2017 Portland State University

Webinar: Economic Impacts From Bicycle And Pedestrian Street Improvements, Jenny H. Liu

Jenny Liu

As many cities are investing in street improvements to provide better biking and walking experiences, the economic value and impacts of these active transportation facilities remain areas where many practitioners, planners and policy makers are seeking more conclusive evidence. With various modes competing for scarce resources, planners and transportation agencies often struggle with how to justify infrastructure investments for non-motorized modes, particularly when driving is still the predominant mode of transportation in most cities. In this project we assess property value impacts of Portland’s “Green Loop” signature bike infrastructure concept, illustrating the importance of considering both accessibility and extensiveness ...


Transportation Cost Index As A Performance Measure For Transportation And Land Use Systems: New Approaches And Applications, Liming Wang, Huajie Yang, Jenny H. Liu 2017 Portland State University

Transportation Cost Index As A Performance Measure For Transportation And Land Use Systems: New Approaches And Applications, Liming Wang, Huajie Yang, Jenny H. Liu

Jenny Liu

This research aims to fill gaps in existing multi-modal performance measures for transportation and land use systems:

  1. As a supplement/replacement of traffic-centric measures such as LOS, travel delay;
  2. Recent federal and state legislations put more emphases on using of performance measures in transportation planning & operation: MAP-21, Oregon Job and Transportation Act (OJTA);
  3. Existing performance measures for transportation and land use systems, although now numerous, have their own limitation (Table 1), and leave important aspects and policy areas uncovered, for example, the balance of transportation investment between different modes and across geographical areas as mandated by OJTA


Retail Rent With Respect To Distance From Light Rail Transit Stations In Dallas And Denver, Arthur C. Nelson, Dejan Eskic, Joanna P. Ganning, Shima Hamidi, Susan J. Petheram, Jenny H. Liu, Reid Ewing 2017 University of Utah

Retail Rent With Respect To Distance From Light Rail Transit Stations In Dallas And Denver, Arthur C. Nelson, Dejan Eskic, Joanna P. Ganning, Shima Hamidi, Susan J. Petheram, Jenny H. Liu, Reid Ewing

Jenny Liu

A growing body of recent research is challenging the assumptions underlying the half-mile-circle in planning for development around transit stations. In this article we review this literature and extend it to include retail land uses. We estimate the rent premium conferred on retail properties in metropolitan Dallas and metropolitan Denver, both of which have extensive light rail transit systems. We find that consistent with half-mile-circle assumptions, retail rent premiums extend only to about 0.30 mile from transit stations with half the premium dissipating after a few hundred feet and three quarters within the first 0.10 mile. We offer ...


Transit And Economic Resilience, Arthur C. Nelson, Matt Miller, Joanna P. Ganning, Philip Stoker, Jenny H. Liu, Reid Ewing 2017 University of Utah

Transit And Economic Resilience, Arthur C. Nelson, Matt Miller, Joanna P. Ganning, Philip Stoker, Jenny H. Liu, Reid Ewing

Jenny Liu

Do fixed-guideway transit systems facilitate resilience with metropolitan areas? There is little literature making this connection theoretically and none testing it empirically. This paper helps close this gap in both respects. In evaluating metropolitan areas with light rail transit systems the authors find evidence that transit corridors on the whole performed better than control corridors during the recovery period of two recessions: that of the early 2000s and the so-called Great Recession. In particular, during the Great Recession transit corridors outperformed control corridors among many economic sectors. Outcomes were more impressive during recoveries from both the recession of the early ...


Office Rent Premiums With Respect To Distance From Light Rail Transit Stations In Dallas And Denver, Arthur C. Nelson, Dejan Eskic, Joanna P. Ganning, Shima Hamidi, Susan J. Petheram, Jenny H. Liu, Reid Ewing 2017 University of Utah

Office Rent Premiums With Respect To Distance From Light Rail Transit Stations In Dallas And Denver, Arthur C. Nelson, Dejan Eskic, Joanna P. Ganning, Shima Hamidi, Susan J. Petheram, Jenny H. Liu, Reid Ewing

Jenny Liu

It seems an article-of-faith that real estate markets respond more favorably to location within one-half mile of transit stations. Planning and public decision-makers have thus drawn half-mile (or smaller) circles around rail transit stations assuming larger planning areas would not be supported by the evidence. Recent research, however, has shown market-responsiveness well beyond one-half mile. We contribute to this literature by evaluating the distance-decay function of office rents in metropolitan Dallas and Denver with respect to light rail transit (LRT) station distance. Using a quadratic transformation of distance we find office rent premiums extending in the range of two miles ...


Inclusive Planning To Evaluate Improved Non-Emergency Medical Transportation Services For Patients With End Stage Renal Disease, Jenny Liu, August Benzow 2017 Portland State University

Inclusive Planning To Evaluate Improved Non-Emergency Medical Transportation Services For Patients With End Stage Renal Disease, Jenny Liu, August Benzow

Jenny Liu

The objective of this project is to design a framework that could be used to evaluate the effectiveness and efficiency of non-emergency transportation services (NEMT) for better livability. In addition to the development of the framework, this project aimed to establish connections between Portland State University (PSU) researchers with regional connections involved in public health research, non-emergency medical transportation, medical services, and medical insurance provision. With the rising costs of transportation and medical costs generally in the United States, it is increasingly important to develop new tools and strategies to reduce these costs while maintaining and improving upon the level ...


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