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
Identify and Address Institutional Barriers Delaying Incident Clearance
Karen Dixon
Lei Zhang
Effective incident management can substantially reduce congestion while expediting incident clearance. In Oregon, the ODOT has a comprehensive incident management program in place. Due to cooperative efforts among ODOT, Oregon State Police, local p ...
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
Dynamic Activity-Based Travel Forecasting System
John Gliebe
Metro, the regional transportation planning agency for Portland, Oregon, has long been a leader in the advanced travel demand modeling practices in the U.S.. In recent years, the questions being asked of modelers at Metro have sometimes exceeded the ...
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
Influence of Environmental Effects on Durability of CFRP for Shear Strengthening of RC Girders Year 2
Christopher Higgins
Many existing conventionally reinforced concrete deck-girder (RCDG) bridges, particularly those from the 1950’s, were originally designed with relatively light shear reinforcing and poor flexural detailing. These bridges can exhibit diagonal cracki ...
Read More
Understanding School Travel: How Residential Location Choice and the Built Environment Affect Trips to School
Yizhao Yang
Marc Schlossberg
This project looks at the issues related to parents’ decisions about children’s school transportation, and examines school transportation in the context of where families live and how families make decisions about school travel in the process of ...
Read More
Options for Integrating Urban Land Use and Travel Demand Models
John Gliebe
Despite a growing interest among the transportation planning community for the use of more sophisticated land use forecasting tools, agencies have been slow to adopt state-of-the-art land use modeling practices. Barriers include a multitude of differ ...
Read More