With the emergence of electric vehicles (EVs) as an environmentally friendly alternative to the internal combustion engine, OTREC researcher Robert Bass decided to investigate some of the uncharted effects of their growing prevalence.
Bass is interested in measuring and understanding the impacts that electric vehicle charging stations have on their cities’ power distribution systems.
Electric Avenue, located on the Portland State University campus where Bass is an associate professor, is the perfect research opportunity: a row of EV charging stations along Southwest Montgomery Street, between Broadway and Sixth Avenue in downtown Portland, Ore.
Launched in August 2011 as a joint project by Portland General Electric, PSU and the City of Portland, Electric Avenue is intended as a research platform for understanding the impact EVs have within the larger context of the city.
Nonlinear loads such as EV chargers can introduce power quality issues to a city’s electricity distribution system. Bass, with PSU undergraduate student Nicole Zimmerman, set out to measure the power quality effects of EV chargers along Electric Avenue.
Power quality manifests in several ways; for this study, the researchers focused on...Read more
OTREC research from Portland State University has developed a new method of travel demand modeling for pedestrian trips.
Transportation professionals use travel demand modeling to forecast how many people will be using a given portion of the transportation infrastructure. This is typically done using a four-step process, the first step of which relies upon a basic unit known as a transportation analysis zone, or TAZ.
A TAZ is a relatively coarse unit of space that can vary in size depending on planners’ needs; typically it encompasses somewhere around 3,000 residents.
Planners started using TAZs in the 1950s, on mainframe computers with limited capabilities, for guidance in making highway investment decisions. As transportation modeling practice has evolved, computers are capable of processing more data and models are being increasingly relied upon to answer more complex questions.
Despite growing investment in infrastructure that supports active forms of travel, existing modeling tools often poorly represent the nuances of the pedestrian environment. The project’s principal investigator, Kelly Clifton of Portland State University, explores ways to improve upon the modeling tools currently in existence.
When considering pedestrian travel, the current practice is usually to...Read more
Note: In advance of the Transportation Research Board's annual meeting, the biggest forum on the transportation research calendar, OTREC.us is profiling some of the researchers who will present their work.
How long is too long to wait for the light to change? At stoplights, pedestrians often experience longer delays while cars are given priority.
To design traffic signals that serve the needs of walkers, planners must understand the motivations behind pedestrian behaviors.
Working with professors Kelly Clifton and Christopher Monsere, Sirisha Kothuri of Portland State University created a survey designed to shed some light on what makes pedestrians decide to follow, or not follow, traffic laws.
To collect data, Kothuri and a team of graduate students armed with an 11-question survey posted themselves at four different intersections in northeast Portland, Ore.
Two of the intersections had recall signals, where pedestrians are automatically detected, and the other two had actuated signals, where pedestrians must press a button to get the light to change.
Survey respondents were asked for their attitudes about delay in signal timing, and for the reasons that determined their crossing the street.
Responses showed that pedestrians were more content...Read more
OTREC hosted a “welcome to the neighborhood” reception last week for managers of TriMet.
The regional transit provider for Portland, Ore, just relocated its offices to a building near the OTREC headquarters. TriMet's arrival in Harrison Square, just a few blocks from PSU in downtown Portland, was toasted by an informal gathering: TriMet executives were invited to the OTREC offices Tuesday, Oct 29 for a meet-and-greet.
The two agencies are both deeply involved with transportation in the Portland region, and since they're going to be neighbors now too, OTREC's education and technology transfer program manager Jon Makler arranged the event.
Several members of TriMet's senior staff joined OTREC staff and researchers for an hour of refreshments, research briefings, and a few rounds of "Transit Route Bingo."
OTREC Director Jennifer Dill and TriMet's Olivia Clark, head of government relations, kicked off the meeting with some welcoming remarks, then Makler gave the TriMet managers a brief powerpoint presentation, explaining the various overlapping areas of transportation at PSU. He introduced them to OTREC, IBPI, and PORTAL, and the role each group plays.
The presentation also featured a slide for each faculty researcher, explaining their areas of special interest and...Read more
Most people in transportation circles have heard all about the Netherlands as a bicyclist’s mecca, a place where thirty-five percent of the population regularly commutes by bike. What may be less commonly known is how recent this achievement is.
In 1967, bicycling in the Netherlands was “tantamount to attempting suicide,” according to Amsterdam’s chief inspector of traffic police.
Today, the Netherlands is the safest place in the world to operate a bicycle, based on injury and fatality rates per miles traveled. In less than fifty years, their bicycle safety rates have soared and the Dutch have built a bicycle infrastructure that is the envy of the rest of the world. How did they do it?
Could Americans possibly do the same?
That’s what Portland State University transportation students aim to find out.
When PSU student Kirk Paulsen signed up to spend two weeks in the Netherlands as part of the first PSU civil engineering study abroad program, he wasn’t sure what exactly he might get out of it, but knew that he wanted to see famed Dutch bicycling facilities for himself. Paulsen was one of seven transportation students in the pilot class of 2011, and now has this to say about the experience:
“This short study abroad course is by far your best opportunity while enrolled at PSU to observe real world...Read more
Portland, Oregon is known for being a bike city, even called America's Best Bike City by Bicycling Magazine, so it's no surprise at all that Portland State University is full of bike enthusiasts.
The $15,000 fellowship -- funded through an ISS (Institute for Sustainable Solutions) grant -- along with an $800 OTREC/NITC scholarship for the 2012-2013 academic year, will assist Kothuri with her research into pedestrian signal timing.
Sirisha was born and raised in Hyderabad, India, and still misses the heat — or at least, the warmth; she has yet to become completely acclimated to Portland, Ore weather. In Hyderabad she obtained a bachelor's degree in Civil Engineering from Osmania University in 1999. She moved to Baton Rouge, Louisiana in 1999 to get a Master’s degree in Civil Engineering at Louisiana State University.
A visit to Illinois for her brother's graduation opened her eyes to the automobile-centric cities that make up much of the United States. She was surprised at some of the infrastructure in the Midwest, which decidedly favors cars over pedestrian and other means of active transport.
Walking plays a significant role in the development of healthy,...Read more
OTREC at Portland State University is pleased to announce the 2013 OTREC/NITC scholars.
Each year, OTREC and NITC recognize outstanding students, awarding them scholarships to further their work on transportation projects.
This year's scholarship winners tackle a range of projects, including long-range visions on how to improve equity in transportation, plans for proposed facility upgrades at specific locations, investigations into new ways to strengthen pavement, and the development of advanced technologies to assist the flow of transportation in the real world.