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Articles 1 - 12 of 12
Full-Text Articles in Social and Behavioral Sciences
Development Of Intelligent Multimodal Traffic Monitoring Using Radar Sensor At Intersections, Siyang Cao, Yao-Jan Wu, Feng Jin
Development Of Intelligent Multimodal Traffic Monitoring Using Radar Sensor At Intersections, Siyang Cao, Yao-Jan Wu, Feng Jin
TREC Final Reports
Multimodal traffic monitoring is critical for improving mobility and safety at intersections with potential conflicts among various modes of transportation. Traditional traffic monitoring approaches utilizing cameras cannot work reliably during the night and under hazardous weather conditions. We propose to build a new intelligent multimodal traffic monitoring device using the low-cost mmWave radar. The proposed device can reliably distinguish different modes (such as buses, pedestrians, bicyclists, trucks, motorcycles, etc.), and determine the counts, speed, and moving directions of every single target in an urban environment under various lighting and weather conditions. In the study, a low-cost prototype system will also …
New Radar Sensor Technology For Intelligent Multimodal Traffic Monitoring At Intersections, Siyang Cao, Yao-Jan Wu, Feng Jin
New Radar Sensor Technology For Intelligent Multimodal Traffic Monitoring At Intersections, Siyang Cao, Yao-Jan Wu, Feng Jin
TREC Project Briefs
Intelligent Transportation Systems (ITS) need traffic data to run smoothly. At intersections, where there is the greatest potential for conflicts between road users, being able to reliably and intelligently monitor the different modes of traffic is crucial.
The Federal Highway Administration estimates that more than 50 percent of the combined total of fatal and injury crashes occur at or near intersections. For pedestrians the intersection is a particularly dangerous place: the City of Portland, OR identified that two-thirds of all crashes involving a pedestrian happen at intersections. And when darkness comes earlier in fall and winter, crashes increase dramatically. So …
Data-Driven Mobility Strategies For Multimodal Transportation, Yao-Jan Wu, Xianfeng Terry Yang, Sirisha Kothuri, Abolfazl Karimpour, Qinzheng Wang, Jason Anderson
Data-Driven Mobility Strategies For Multimodal Transportation, Yao-Jan Wu, Xianfeng Terry Yang, Sirisha Kothuri, Abolfazl Karimpour, Qinzheng Wang, Jason Anderson
TREC Final Reports
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 will serve as a bridge to connect speed management strategies of conventional corridors to connected vehicle corridors. This study consists of three main components. In the first component, the impact of speed management strategies along …
Applying Data-Driven Multimodal Speed Management Strategies For Safe, Efficient Transportation, Yao-Jan Wu, Xianfeng Yeng, Sirisha Kothuri
Applying Data-Driven Multimodal Speed Management Strategies For Safe, Efficient Transportation, Yao-Jan Wu, Xianfeng Yeng, Sirisha Kothuri
TREC Project Briefs
How can we use a variety of data-driven speed management strategies to make transportation safer and more efficient for all modes–whether you’re driving, walking or taking transit? The project was led by Yao Jan Wu, director of the Smart Transportation Lab at the University of Arizona. Co-investigators were Xianfeng Terry Yang of the University of Utah, who researches traffic operations and modeling along with connected automated vehicles, and Sirisha Kothuri of Portland State University, whose research has focused on improving signal timing to better serve pedestrians. “We want to improve mobility for all users, be it pedestrians, vehicle drivers or …
Evaluation Of Bus/Bicycle Andbus/Right-Turn Traffic Delays And Conflicts, Miguel A. Figliozzi, Katherine Keeling, Travis Glick
Evaluation Of Bus/Bicycle Andbus/Right-Turn Traffic Delays And Conflicts, Miguel A. Figliozzi, Katherine Keeling, Travis Glick
TREC Final Reports
This research evaluates conflicts and delays caused by interactions between buses, bicycles, and right-turningvehicles. Two concerns caused by these overlapping bus, bicycle, and automobile facilities are analyzed; the firstconcern is the number of bus-bicycle conflicts (as a proxy for safety) and the second concern is bus delay. Video datawas collected and analyzed to quantify conflicts, travel time, and delay. For every bus passing through the study site,the mixed-traffic scenario that the bus incurs was categorized as one of 72 different combinations of bus, bicycle, andautomobile interactions. Video count data was weighted according to seasonal, weekly, and hourly bicycle volumedata to …
Influence Of Road Cross Section On Access Spacing, Karen K. Dixon, Yanfen Zhou, J. L. Gattis
Influence Of Road Cross Section On Access Spacing, Karen K. Dixon, Yanfen Zhou, J. L. Gattis
TREC Final Reports
This report presents a study on the influences of select cross-sectional-related design elements (specifically median configurations and bicycle lanes) and their impact on crash severity and type, as well as the associated driver gap acceptance for turning maneuvers at midblock driveway locations on urban arterials. The primary goal of this proposed research is to better understand how the median and bicycle lane configurations can influence safety and operations at driveway locations. The research team utilized crash data, traffic data, and roadway information from driveway locations in the U.S. states of Oregon, Arkansas and Oklahoma. The project team supplemented the data …
Improved Pedestrian Safety At Signalized Intersections Operating The Flashing Yellow Arrow, David Hurwitz, Christopher M. Monsere
Improved Pedestrian Safety At Signalized Intersections Operating The Flashing Yellow Arrow, David Hurwitz, Christopher M. Monsere
TREC Final Reports
In some jurisdictions, protected left-turn phasing has been replaced with the flashing yellow arrow (FYA) for protected/permissive left turns (PPLTs) to reduce delay. However, it is important to have a thorough understanding of the conflict between pedestrians and the permissive left-turning vehicle. This presentation summarizes the results of research conducted with a high-fidelity, motion-based driving simulator and mobile eye-tracking equipment to study the effects of the opposing traffic, the presence and walking direction of pedestrians, and the number of section heads to display the FYA on driver performance. To accomplish this research, a six-intersection simulated environment was created. In total, …
Bicycle And Pedestrian Engineering Design Curriculum Expansion, Ashley Haire
Bicycle And Pedestrian Engineering Design Curriculum Expansion, Ashley Haire
TREC Final Reports
This project summary report describes the execution of OTREC Project #298 (Development, Deployment and Assessment of a New Educational Paradigm for Transportation Professionals and University Students). The project is one facet of a multiyear collaboration of the Region X Transportation Consortium that was sponsored by the Federal Highway Administration (FHWA). The regional collaboration aims to shift the traditional paradigm of engineering course delivery to foster a more hands-on approach. The University of Idaho, for example, has created activity-based modules for a traffic signals course, while the University of Washington developed similar modules for a freight systems course. The focus of …
Evaluation Of Innovative Bicycle Facilities: Sw Broadway Cycle Track And Sw Stark/Oak Street Buffered Bike Lanes, Christopher Michael Monsere, Nathan Mcneil, Jennifer Dill
Evaluation Of Innovative Bicycle Facilities: Sw Broadway Cycle Track And Sw Stark/Oak Street Buffered Bike Lanes, Christopher Michael Monsere, Nathan Mcneil, Jennifer Dill
Urban Studies and Planning Faculty Publications and Presentations
Two innovative bicycle facilities installed in late summer and early fall 2009 in downtown Portland by the City of Portland Bureau of Transportation (PBOT) were evaluated to understand how they are functioning on multiple levels. All of these facilities involved removing a motor vehicle lane by restriping to provide additional roadway space to bicyclists. The facilities include:
- A cycle track (a seven-foot bike lane separated from motor vehicle traffic by a row of parked cars and a painted three-foot pedestrian buffer), on SW Broadway from SW Clay to SW Jackson through the Portland State University campus, and
- A couplet of …
Bicycle And Pedestrian Design Curriculum Expansion, Lynn Weigand
Bicycle And Pedestrian Design Curriculum Expansion, Lynn Weigand
TREC Final Reports
This project broadened course offerings on bicycle and pedestrian transportation by redesigning and expanding an existing, three credit undergraduate/graduate course into a five-credit course that includes an applied lab component. The course was open to graduate and undergraduate students in planning and engineering programs. The PI (Lynn Weigand, Ph.D., adjunct faculty) and Mia Birk, adjunct faculty course instructor, developed the course with the following learning objectives:
- learn principles of bicycle and pedestrian facility design;
- understand integration of bicycle and pedestrian facilities within the right-of-way;
- understand basic transportation research and data collection methods; and
- apply course content through project work.
The …
Connecting Students And The Community, Lynn Weigand
Connecting Students And The Community, Lynn Weigand
TREC Project Briefs
Nationwide, few university courses focus specifically on planning and design for pedestrian and bicycle facilities. Before this project, Portland State University had only one three-credit course on the subject, which did not provide adequate time to cover all aspects of bicycle and pedestrian transportation planning, policy, design and practice. Although the course provided a useful introduction to the topic and received excellent student reviews, faculty members saw a need to expand the curriculum to provide an opportunity for practical application of the theory and practice and increase the course’s academic rigor.
This project broadened the course offerings on bicycle and …
Initiative For Bicycle And Pedestrian Innovation, Jennifer Dill, Lynn Weigand
Initiative For Bicycle And Pedestrian Innovation, Jennifer Dill, Lynn Weigand
Urban Studies and Planning Faculty Publications and Presentations
The Initiative for Bicycle and Pedestrian Innovation aims to advance the field of bicycle and pedestrian transportation through four primary mechanisms: (1) developing and pursuing a collaborative research agenda that more directly informs practice and and involves students through dissertation research and fellowships; (2) translating relevant research into a format and language that is more useful to practitioners, and making that research available through technology transfer; (3) developing more holistic approaches to the education and training of planners and engineers; and (4) supporting community-based outreach and education, to promote awareness of bicycle and pedestrian issues statewide and nationally. This proposal …