339 Results
Empirical Observation of the Impact of Traffic Oscillations on Freeway Safety
Christopher Monsere
Soyoung Ahn
Traffic oscillations are typical features of congested traffic flow that are characterized by recurring decelerations followed by accelerations (stop-and-go driving). The negative environmental impacts of these oscillations are widely accepted, but t ...
Read More
Active Recreation in Parks: Correlates of Park Design and Facilities for Use and Physical Activity
Lynn Weigand
Current research is examining the link between the built environment and regular physical activity to improve public health. As communities become denser and individual lots become smaller, locally accessible parks will assume more importance as plac ...
Read More
Distribution Logistics Course
Miguel Andres Figliozzi
Commercial vehicle movements associated with the delivery of goods and services are currently experiencing a number of challenging problems. Carriers and fleet operations face congestion, a growing number of tolls, increasing service level demands, a ...
Read More
Characteristics of Transitions in Freeway Traffic
Robert Bertini
Soyoung Ahn
This research seeks to understand the characteristics of transitions as freeway traffic changes from one state to another. This study addresses the features of two types of transitions; transitions near a merge and transitions along shock waves durin ...
Read More
Using Archived ITS Data to Measure the Operational Benefits of a System-wide Adaptive Ramp Metering System
Robert Bertini
Christopher Monsere
A System-Wide Adaptive Ramp Metering (SWARM) system has been implemented in the Portland, Oregon metropolitan area, replacing the previous pre-timed ramp-metering system that had been in operation since 1981. SWARM has been deployed on six major corr ...
Read More
Food Delivery Footprint: Addressing Transportation, Packaging, and Waste in the Food Supply Chain
Madeleine Pullman
Darrell Brown , Scott Marshall
Transportation of food accounts for a significant fraction of the carbon dioxide emissions believed to be adversely impacting climate and the environment. And this impact is increasing as food supply chains become longer and more complex, and food pa ...
Read More
Seismic Damage State Models for Oregon Bridges
Peter Dusicka
The U.S. highway transportation network relies on the health and integrity of major infrastructure elements such as bridges. Frequently traveled parts of Oregon are within the seismically active Pacific Northwest, and many of the bridges were designe ...
Read More
Exploratory Methods for Truck Re-identification in a Statewide Network Based on Axle Weight and Axle Spacing Data to Enhance Freight Metrics
Christopher Monsere
Mecit Cetin , Andrew Nichols
Most transportation agencies rely on point detectors (e.g., inductive loops, axle detectors) located at specific points on highways to collect data on traffic volumes, vehicle classes, and other relevant attributes of traffic. By utilizing the data c ...
Read More
Bicycle and Pedestrian Education Program
Lynn Weigand
Karen Dixon , Marc Schlossberg
Since the 1990s, the amount of attention and funding for bicycle and pedestrian infrastructure has increased significantly. This, combined with the role of transportation in public health and environmental concerns, has raised expectations for engine ...
Read More
Expanding Development of the Oregon Traffic Safety Data Archive
Christopher Monsere
This report describes the preliminary work to develop the Oregon Traffic Safety Data Archive (OrTSDA). The mission of OrTSDA is to “build the knowledge base of traffic safety data in Oregon.” It is hoped the archive will become a valuable traffic ...
Read More
Performance Enhancement of Bridge Bracing Under Service and Extreme Loads
Peter Dusicka
As truck loads continue to get bigger, the demand on many aging bridges increases. Slender steel structural elements widely used in bridge superstructures and braced substructures to resist these loads are built primarily for tension, however, and ca ...
Read More
Understanding Driver Behavioral Changes Associated with Road User Fees
Anthony Rufolo
Objective
The Oregon Department of Transportation conducted a test of an innovative technology to replace fuel taxes with mileage fees. In the test, some vehicles were charged a flat fee per mile and others were charged differential fees that were ...
Read More