News Tagged: Alex Bigazzi

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Unique course puts emissions models in transportation engineers’ hands

Posted on February 21, 2014

Portland State University engineering doctoral student Alex Bigazzi has developed a new course aimed at giving transportation engineers experience running emissions models. The course, Transportation Emissions Modeling, is offered through the Department of Civil and Environmental Engineering.

The practical nature of the course sets it apart from the few emissions courses offered at other universities, Bigazzi said. “Those tend to be on the policy side or the environmental side,” he said. “This is unique in trying to help engineers more than policymakers or future policymakers.”

The course fits with both Bigazzi’s own experience and Portland State’s faculty research strength in emissions and modeling. The university already offers an air quality course, but Bigazzi’s offering focuses narrowly on emissions from motor vehicles.

Students spent the first half of the inaugural course learning context for the models, including when they are used and what they can do. “There are federal requirements to do these models for all serious transportation projects,” Bigazzi said. “People need to understand what goes into them and how accurate they can be.”

Because emissions models aren’t as complex mathematically as other models, and because the Environmental Protection Agency’s MOVES model is freely accessible, students can spend more time learning exactly what the model can and can’t do.

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Tags: alex bigazzi, emissions, transportation modeling

PSU graduate students make a good showing at Western ITE conference

Posted on July 25, 2013

OTREC was well-represented at this year’s Western ITE conference, the 2013 conference for the Western District of the Institute of Transportation Engineers. Eight graduate student researchers presented papers at the conference, which took place July 14 through 17 in Phoenix, Arizona.

Portland State University students Katherine Bell, Kirk Paulsen, Adam Moore, Wei Feng, Sirisha Kothuri, Pamela Johnson, Sam Thompson and Alex Bigazzi attended the three-day conference and showcased their work in transportation research.

The conference was held at the Arizona Biltmore, a 1920’s luxury hotel created by architects Albert Chase McArthur and Frank Lloyd Wright. For the engineering and planning students, the Biltmore held its own attraction as an example of unique architecture, and in between events they enjoyed walking the grounds. 

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Tags: adam moore, alex bigazzi, conference, katherine bell, kirk paulsen, otrec, pamela johnson, psu, research, sam thompson, sirisha kothuri, wei feng

Research explores the value of travel-time reliability

Posted on April 5, 2013

When planning their daily commute, most drivers account for the traffic they know is unavoidable: at peak times of day, like morning and afternoon rush hour, they probably allow extra time to get where they’re going.

The delays that are harder to accept are the unexpected ones, when accidents, road work, or a traffic bottleneck turn a thirty minute trip into an hour.

This unpredictable postponement leads to natural frustration on the part of drivers, as it may cause them to be late to work or late picking up children from school. A reliable road network is one in which this is a rare occurrence.

A project led by Portland State University’s Miguel Figliozzi explored the value of this travel-time reliability using a study of commuters’ route choice behavior, taking a look at the trade-offs between reliability, traffic congestion, and air pollution.

The details for the combined project can be found here.

In the first phase of the research, co-investigators David Levinson and Kathleen Harder of the University of Minnesota sought to measure the route choices drivers made in a real-world setting. Instead of just having people fill out a survey about whether they would choose to take major roads or the freeway to work, this study ambitiously placed GPS units in the cars of volunteers, to measure their actual behavior based on factors that arose each day.

They wanted to determine the importance of reliability in commuters’ route choices. If travelers could ensure reaching their destinations in a time-certain manner, the researchers thought, they might be willing to drive on paths with longer travel-times rather than risking the use of paths with shorter travel-times but higher variability.

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Tags: alex bigazzi, congestion, emissions, livability, miguel figliozzi, otrec, portland state university

Graduate student takes research to southeast Asia

Posted on April 5, 2013

Graduate student researcher Alex Bigazzi, of Portland State University, will present his work in Vietnam next week.

The Asia-Pacific Economic Cooperation (APEC) is hosting a transportation workshop in Ho Chi Minh city. The opportunity for Bigazzi to attend is the result of a spontaneous connection he made recently at a conference in Annapolis, Maryland, where he was giving a paper on truck-specific traffic management.

Large trucks contribute a large share of emissions, especially when traveling at a slow crawl through heavy traffic. Bigazzi’s work explores ways to mitigate the effects of this traffic congestion on air quality.

Bigazzi presented two papers at the 54th Annual Transportation Research Forum, which took place March 21-23 in Annapolis. One of them, “The Emissions Benefits of Truck-Only Lane Management,” offers a better understanding of the impacts of congestion on heavy-duty vehicles.

After a question-and-answer exchange, he was invited to present the same research in Vietnam’s largest city.

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Tags: alex bigazzi, apec, congestion, emissions, livability, miguel figliozzi, otrec, portland state university

Innovative research from OTREC faculty, students on TRB conference agenda

Posted on January 20, 2012

Students and faculty researchers from OTREC universities will present 45 papers at the Transportation Research Board’s annual meeting Jan. 22 to 26 in Washington, D.C.

The papers, to be presented at 37 separate sessions and poster sessions, stem from transportation research at Portland State University, the University of Oregon and Oregon State University. The three universities will send 43 students to the conference.

Alex Bigazzi, a PSU engineering doctoral student, will present his work on topics including congestion and emissions at the conference. Some of that work stems from his master’s thesis, “Roadway Congestion Impacts on Emissions, Air Quality, and Exposure,” with adviser Miguel Figliozzi at PSU. The thesis won this year’s Milton Pikarsky Memorial Award, which will be presented Jan. 21 at the Council of University Transportation Centers awards banquet.

Bigazzi will present another paper, which he wrote with PSU’s Kelly Clifton and Brian Gregor of the Oregon Department of Transportation, that looks at fuel economy for alternative-fuel vehicles in congestion. Titled “Advanced Vehicle Fuel-Speed Curves for Regional Greenhouse Gas Scenario Analysis,” the paper helps Oregon DOT incorporate hybrid, electric and fuel-cell vehicles into its emissions planning model.

While traditional vehicles lose fuel efficiency during congested driving, advanced vehicles don’t suffer from the same effects, according to the paper.  Some even do better in congestion than at higher speeds.

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Tags: alex bigazzi, chris monsere, david hurwitz, greenhouse gas, kelly clifton, miguel figliozzi, transportation research board

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