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View Steven Gehrke's slides
View Kihong Kim's slides
Following the 2015 annual meeting of the Transportation Research Board, this Friday seminar will showcase some of Portland State University's student TRB research.
Presenters:
Steven Gehrke, GRA in civil and environmental engineering
Toward a Spatial-Temporal Measure of Land Use Mix
Summary: Urban policies have emphasized the importance of mixing land uses in a neighborhood as an intervention beholding of lasting planning and public health benefits. Transportation planning research has identified the potential of efficiency gains... Read more
In honor of our 10-year anniversary, we’re trying something a little different. Instead of brief sessions that introduce you to a topic– we will be offering fifteen half-day workshops that focus on skill building and providing the tools to apply the latest research to practice. These will be hands-on, immersive learning experiences in a small classroom setting.
REGISTRATION
This event is a la carte, and pricing is per workshop. You may attend as few as one, or as many as four workshops.
- Half-Day Workshop (general admission): $95
- Half-Day Workshop (student rate): $50
THE PROGRAM
⇨SEE THE FULL SCHEDULE AND DETAILS
- Survey Design: Asking the Right Questions
- Bicycle/Pedestrian Focused Signal Timing Strategies: What, When, Where, Why, and How?
- Activating Community Opportunities Using Transportation Organizations as Assets
- Cost Accounting for Program and Budget Planning Today and Tomorrow
- Data Analysis for Smarties Who Forgot What They Learned in College
- What’s New in the HCM 6th Edition?
- Ecological Momentary Assessment Methods with Transportation Disadvantaged Populations
- Calculating...
The video begins at 2:51.
Adam Moore: Bus Stop Air Quality: An Empirical Analysis of Exposure to Particulate Matter at Bus Stop Shelters
Congested traffic corridors in dense urban areas are key contributors to the degradation of urban air quality. While waiting at bus stops, transit patrons may be exposed to greater amounts of vehicle-based pollution, including particulate matter, due to their proximity to the roadway. Current guidelines for the location and design of bus stops do not take into account air quality or exposure considerations. This study compares the exposure of transit riders waiting at three-sided bus stop shelters that either: 1) face the roadway traffic or 2) face away from the roadway traffic. Shelters were instrumented with air quality monitoring equipment, sonic anemometers, and vehicle counters. Data were collected for two days at three shelters during both the morning and afternoon peak periods. Bus shelter orientation is found to significantly affect concentration of four sizes of particulate matter: ultrafine particles, PM1, PM2.5, and PM10. Shelters with an opening oriented towards the roadway were consistently observed to have higher concentrations inside the shelter than outside the shelter. In contrast, shelters oriented away from the roadway were observed to have lower concentrations inside the shelter than outside the shelter. The differences in particulate matter...
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PRESENTATION ARCHIVE
OVERVIEW
Multimodal transportation systems (e.g., walking, cycling, automobile, public transit, etc.) are effective in increasing people’s travel flexibility, reducing congestion, and improving safety. Therefore, it is critical to understand what factors would affect people’s mode choices. With advanced technology, such as connected and automated vehicles, cities are now facing a transition from traditional urban planning to developing smart cities. To support multimodal transportation management, this study serves as a bridge to connect speed management strategies of conventional corridors to connected vehicle corridors.
The study consists of three main components. In the first component, the impact of speed management strategies along traditional corridors was evaluated. In the second component, the impacts of the specific speed management strategies, signal retiming and...
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View Patrick Singleton's slides
View Ryan Dann's slides
Following the 2015 annual meeting of the Transportation Research Board, this Friday seminar will showcase some of Portland State University's student TRB research.
Presenters:
Patrick Singleton, GRA in civil and environmental engineering
The theory of travel decision-making: A conceptual framework of active travel behavior
Summary: We present a unifying conceptual framework of active travel behavior called the theory of travel decision-making. It integrates seminal travel-related concepts from economics, geography, and psychology with... Read more
*NEW* LOCATION: Karl Miller Center at PSU, 631 SW Harrison St., Room 465
*NEW* REGISTRATION: Sign up through GoToWebinar
SEMINAR VIDEO
HUAJIE YANG
...
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The video begins at 0:34.
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Speaker: Joseph Broach, Ph.D. Candidate, Portland State University
Topic: Trick or Treatment? Impact of Route-Level Features on Decisions to Walk or Bike
Summary: Some travel routes attract people walking and cycling, while others may scare them away. What features of street environments are most important, and how do available routes affect decisions to bike or walk on a specific trip?
Research to date has focused on either large-scale areal measures like "miles of bike lane nearby" or else has considered only shortest path routes. Neither method is suited to capturing the impact of targeted route-level policies like neighborhood greenways. This session will present a new technique for measuring bike and walk accessibility along the most likely route for a given trip. The method is applied to travel data, and results provide new insight into the relationship between route quality and travel mode choice.
The video begins at 4:13.
Wei Feng: Impacts of Economic, Technological and Operational Factors on the Economic Competitiveness of Electric Commercial Vehicles in Fleet Replacement Decisions
Electric commercial vehicles (ECV) have the potential to substantially reduce greenhouse gas emissions, noise, and pollution in urban areas. In addition, ECVs have lower per-mile operating costs and potentially lower maintenance costs. However, the initial purchase cost of ECVs is significantly higher than the purchase cost of a conventional diesel vehicle. From a purely economic perspective, there is a cost tradeoff between the low operating and maintenance costs of ECVs and their high initial capital costs. In this paper, a fleet replacement optimization framework is employed to analyze the competitiveness of ECVs. Scenarios with different fleet utilization, fuel efficiency and sensitivity analysis of ten additional factors indicate that ECVs are more cost effective when conventional diesel vehicles’ fuel efficiency is low (8.2 miles/gallon) and daily utilization is more than 54 miles. Breakeven values of some key economic and technological factors that separate the competitiveness between ECVs and conventional diesel vehicles are calculated in all scenarios. For example, in low conventional diesel vehicle fuel efficiency and low daily utilization scenario, ECVs are more competitive when their purchase prices...
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