Friday Transportation Seminar: Safety Effectiveness of Pedestrian Crossing Treatments

Friday, October 13, 2017, 12:00pm to 1:00pm PDT

LOCATION: PSU, Urban Center Building, Room 204 (Distance Learning Center Wing)
LIVESTREAM ONLINE: Click here on the day of the seminar to stream it live

SEMINAR VIDEO


SEMINAR SLIDES

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Over the last decade, the transportation agencies in Oregon have systematically enhanced many pedestrian crossings at mid-block locations with Rectangular Rapid Flashing Beacons (RRFBs), Flashing Yellow Beacons (Flash), and high visibility crosswalk markings (Hi-Vis). Enhancements often included the installation of refuge medians. This study explored the safety performance of these enhanced crossings, categorized by enhancement type. Data were collected on 191...

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Friday Transportation Seminar: Utilizing High-Resolution Archived Transit Data to Study Before-and-After Travel-Speed and Travel-Time Conditions

Friday, October 6, 2017, 12:00pm to 1:00pm PDT

SEMINAR VIDEO


SEMINAR SLIDES
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Travel times, operating speeds, and service reliability influence costs and service attractiveness. This research outlines an approach to quantify how these metrics change after a modification of roadway design or transit routes using archived transit data. The Tri-County Metropolitan Transportation District of Oregon (TriMet), Portland’s public transportation provider, archives automatic vehicle location (AVL) data for all buses as part of their bus dispatch system (BDS). This research combines three types of AVL data (stop event, stop disturbance, and high-resolution) to create a detailed account of transit behavior; this probe data gives insights into the behavior of transit as well as general traffic. The methodology also includes an updated approach for confidence...

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Friday Transportation Seminar: Bicycle Safety (and Other) Research at CARRS-Q in Brisbane, Australia

Friday, September 29, 2017, 12:00pm to 1:00pm PDT

LOCATION: PSU, Urban Center Building, Room 204 (Distance Learning Center Wing)
LIVESTREAM ONLINE: Click here on the day of the seminar to stream it live

SEMINAR VIDEO

This presentation will begin with an overview of the activities of the Centre for Accident Research and Road Safety-Queensland. Then a number of bicycle safety research projects will be discussed, with a particular focus on recent and current projects that seek to examine the factors influencing passing distances left by motor vehicles and the effectiveness of one-metre (3-foot) laws.

Presented by Narelle Haworth of Queensland University of Technology


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Webinar: The Effects of Demand-Responsive Parking on Transit Usage and Congestion: Evidence from SFpark

Tuesday, September 26, 2017, 10:00am to 11:00am PDT

WEBINAR SLIDES
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WEBINAR VIDEO

WEBINAR SUMMARY
Parking is a serious issue in many urban areas, especially those experiencing rapid population growth. To address this problem, some cities have implemented demand-responsive pricing programs, where parking prices vary depending on the occupancy rate in a previous period. Yet, few empirical studies have rigorously evaluated these programs. In this study, we investigate the impacts of SFpark, a demand-responsive pricing parking program in San Francisco that began in 2011. We observe effects on three important aspects of urban transportation: parking availability, transit bus ridership and congestion. The timing of this program is plausibly exogenous to factors that affect these outcomes of interest since it is based on...

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Webinar: Breaking Barriers to Bike Share: Insights on Equity

Tuesday, August 22, 2017, 10:00am to 11:30am PDT

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While the number of public bike share systems in the United States grew considerably in recent years, early evidence indicated that many systems were not serving the diverse populations of cities, particularly lower-income residents and people of color. Lack of bike share stations in neighborhoods with people of color and/or lower incomes is one factor; however, considerable disparities appear to persist even when stations are placed in these communities.

Efforts to overcome access and use barriers (such as cost, payment options, and familiarity with the system) to bike share for underserved communities have been initiated in a number of cities. The Better Bike Share Partnership (BBSP) has been working with cities around the country...

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Webinar: Land Use Mix and Pedestrian Travel Behavior: Advancements in Conceptualization and Measurement

Tuesday, July 25, 2017, 10:00am to 11:00am PDT

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Smart growth policies have often emphasized the importance of land use mix as an intervention beholding of lasting urban planning and public health benefits. Past transportation-land use research has identified potential efficiency gains achieved by mixed-use neighborhoods and the subsequent shortening of trip lengths; whereas, public health research has accredited increased land use mixing as an effective policy for facilitating greater physical activity.

However, despite the celebrated transportation, land use, and health benefits of improved land use mixing and the extent of topical attention, no consensus has been reached regarding the conceptualization and measurement of this key smart growth principle or the magnitude of its link to walking. This research, comprising three empirical studies, explores this topic in detail.

This webinar will provide attendees with greater specificity in the measurement of...

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PhD Dissertation Defense: NITC Fellow Patrick Singleton

Thursday, June 15, 2017, 9:00am to 10:00am PDT

The Portland State University Department of Civil and Environmental Engineering is pleased to announce Patrick Singleton's PhD Dissertation Defense: "Exploring the Positive Utility of Travel and Mode Choice."

Adviser: Dr. Kelly Clifton

The “positive utility of travel” (PUT) concept suggests that travel may provide benefits and be motivated by factors beyond simply reaching a destination. This dissertation explores the PUT idea theoretically and empirically, using the results of a novel 2016 survey of nearly 700 commuters in the Portland, OR, region. First, a critical literature review strengthens the PUT concept. Next, the two main PUT aspects—travel-based multitasking and subjective well-being in the travel domain—are analyzed, and potential determinants examined. Finally, an integrated choice and latent variable model reveals significant associations between PUT measures and commute mode choices. Findings contribute to travel behavior research and knowledge and...

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PhD Dissertation Defense: NITC Fellow Kristina Currans

Monday, June 12, 2017, 2:00pm to 3:00pm PDT

The Portland State University Department of Civil and Environmental Engineering is pleased to announce that NITC dissertation fellow Kristina Currans will defend her PhD Dissertation: "Data and Methodological Issues in Assessing Multimodal Transportation Impacts for Urban Development."

Advisor: Dr. Kelly J. Clifton

Since its first edition in 1976, the Institute of Transportation Engineers (ITE) Trip Generation Handbook has become the predominant method for estimating the transportation impacts of land use, despite the lack of sensitivity to changes in the urban environments. As a result, local governments continue to be hampered by the urban application of the Handbook, overestimating (and overcharging for) automobile facilities, creating additional barriers to achieving multimodal or sustainable comprehensive plans. This dissertation explores the spatial, social, and temporal contexts of ITE’s Handbook, quantifying variations in vehicle trip generation estimates where...

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Environmentally Sustainable and Affordable Housing Near Transit in Los Angeles

Friday, June 9, 2017, 12:00pm to 1:00pm PDT

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Providing affordable housing and reducing greenhouse gases are common goals in cities worldwide. Transit-oriented development (TOD) can provide an opportunity to make incremental progress on both fronts, by building affordable housing near transit and by providing alternative transport modes such that households reduce driving. While the existing literature has focused on the relationship between TOD and housing and TOD and greenhouse gas emission reduction as separate issues, it has seldom touched on the possibility that TOD could address both goals jointly. We provide evidence to show that focusing on either housing affordability or greenhouse gas emission reduction in isolation can lead to strategies that achieve one goal to the detriment of the other. Using the case of Los Angeles, we develop a scenario planning model that allows simultaneous consideration of housing and transportation goals, and illustrates the tradeoffs of different policy approaches. The results show that larger increases in residential densities combined with a small...

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China's Motorization Wave and the Place of Emerging Technologies

Friday, June 2, 2017, 12:00pm to 1:00pm PDT

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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 is mostly on emerging lightweight EVs that have surprisingly surpassed all other modes of personal mobility in annual sales and hold great promise across different shared and personal vehicle...

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