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PRESENTATION ARCHIVE
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OVERVIEW
With worsening congestion, travel time reliability is increasingly becoming as critical as average travel times in affecting travel choices. Researchers from Portland State University (PSU) partnered with Washington County, Oregon to offer data-driven strategies in prioritizing funding for travel time reliability improvements on their urban arterials. The vast majority of existing research on travel time reliability has focused exclusively on freeways. Avinash Unnikrishnan, Sirisha Kothuri and Jason C. Anderson leveraged Bluetooth sensors provided and deployed by Bluemac Analytics to identify problem areas in the county. Set up at intersections throughout Washington County, the sensors are able to calculate travel time from one intersection to another by matching Bluetooth signals from devices in people's cars. The researchers evaluated the Bluetooth travel time data to understand the temporal variation in travel time reliability metrics on these urban arterials, including factors related to time of day, weather, and holidays....
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*NEW* LOCATION: Karl Miller Center at PSU, 631 SW Harrison St., Room 465
*NEW* REGISTRATION: Sign up through GoToWebinar
Portland State University students will share the work they presented at the annual meeting of the Transportation Research Board (TRB) 2018:
SEMINAR VIDEO
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PRESENTATION ARCHIVE
OVERVIEW
Shared electric scooters (e-scooters) are fast becoming a mobility option in cities across the United States. This new micromobility mode has the potential to replace car usage for certain trips, which stands to have a positive impact on public health and sustainability goals. However, many aspects of this emerging mode are not well understood.This webinar explores the findings of three NITC studies examining transportation mode choices, safety, and public health outcomes of electric scooters.
KEY LEARNING OUTCOMES
By the end of this presentation, the participant will be able to:
- describe the ways in which electric scooters may provide new substitutive, complimentary or synergist transportation opportunities for different activities...
Friday Transportation Seminars at Portland State University have been a tradition since 2000. With over 450 seminars presented and recorded (access the archive of seminars here), we host both visiting and local scholars to share the latest in research, technology, and implementation in transportation.
PRESENTATION ARCHIVE
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EVENT OVERVIEW
This research explored driver comprehension and behaviors with respect to right-turn signal displays with a focus on the Flashing Yellow Arrow (FYA) in a driving simulator and a comprehension survey. Flashing yellow arrows are used in place of other turn signals, such as solid green or flashing yellow or red circles, to indicate that drivers may turn after yielding to oncoming traffic. These turns are considered “permissive.” Turns where no conflicting traffic is present, such as those indicated with a green arrow, are “protected” turns. The flashing yellow arrow’s inclusion in the...
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Join us Monday, October 24, as TREC director Jennifer Dill moderates a panel on the Future of Transportation in Downtown Portland. Register to attend in person (space is limited), or join online via Zoom.
Moderator: Jennifer Dill, Professor, Toulan School of Urban Studies & Planning and Director of PSU’s Transportation Research and Education Center (TREC)
Panelists:
Gabriel Graff, Central City Capital Program Manager, Portland Bureau of Transportation
Cathy Tuttle, Board Member, BikeLoud PDX
André Lightsey-Walker, Policy Transformation Manager, The Street Trust
Mark Raggett, Associate Principal, GBD Architects and Director of Planning and Design, Friends of Green Loop
The year 2022 marked the 50th anniversary of the City of Portland's 1972 Downtown Plan, one of the most consequential plans in the city's history. It put in place a vision for a public, pedestrian-scaled, multipurpose, and vital downtown. Through the requirements adopted in the Downtown Plan and subsequent...
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Joseph Broach, PhD candidate in Urban Studies, will discuss the results of his research, which models the propensity of children aged 6-16 to walk or bike to parks and school without an adult chaperone, extending existing work on children’s active travel in several ways: 1) focus on travel without an adult, 2) inclusion of school and a non-school destinations, 3) separate walk and bike models, 4) consideration of both parent and child attitudes and perceived social norms, 5) explicit inclusion of household rules limiting walking or bicycling.
The proliferation of information technology in the transportation field has opened up opportunities for communication and analysis of the performance of transportation facilities. The Highway Capacity Manual relies on rules of thumb and small data samples to generate levels of service to assess performance, but modern detection technology gives us the opportunity to better capture the dynamism of these systems and examine their performance from many perspectives. Travelers, operations staff, and researchers can benefit from measurements that provide information such as travel time, effectiveness of signal coordination, and traffic density. In particular, inductive loop detectors show promise as a tool to collect the data necessary to generate such information. But while their use for this purpose on restricted‐access facilities is well understood, a great many challenges remain in using loop detectors to measure the performance of surface streets.
This thesis proposes 6 methods for estimating arterial travel time. Estimates are compared to simulated data visually, with input/output diagrams; and statistically, with travel times. Methods for estimating travel time are applied to aggregated data and to varying detector densities and evaluated as above. Conclusions are drawn about which method provides the best estimates, what levels of data aggregation can still provide useful information, and what the effects of detector density are on the quality of estimates....
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