·Dr. Frey recently gave a seminar on “Denying Denialism:Uncovering the Methods and Institutions of Climate Change Denial”Theabstract, slides, and video for this seminar
·The Transportation and Air Quality Committee (ADC20) of
the Transportation Research Board selected a paper authored by Dr. H.
Christopher Frey and graduate students Maryam Delavarrafiee
and Sanjam Singh as its "Spotlight Presentation"
for the 2017 TRB Annual Meeting.The
paper, "Real-World Freeway and Ramp Activity and Emissions for Light
Duty Gasoline Vehicles," was ranked 1st among 110 papers reviewed by
ADC20 for the Annual Meeting.
·Dr. H. Christopher Frey who is a member of the Board of
Directors of the Air & Waste Management Association (A&WMA), was
elected in November 2016 as a 2017 Vice President of the A&WMA.He will join the A&WMA Executive
Committee in addition to continuing to serve on the board.
·PhD student Maryam
Delavarrafiee, advised by Dr. Frey, won a Student Merit Award from the
Exposure Assessment Specialty Group of the Society for Risk Analysis.Ms. Delavarrafiee
will receive the award at the SRA Annual Meeting in Arlington, VA during
Dec 7-10, 2015 where she will present a paper on “Empirical Comparison of
Fine Particulate Matter Exposure Concentrations in North Carolina State
University Campus Buses and a Personal Passenger Car.”
·Dr. Frey is quoted in an article by NC Health News regarding the scientific
basis for the new Ozone National Ambient Air Quality Standard announced by
the U.S. Environmental Protection Agency on October 1, 2015.Dr. Frey chaired the EPA Clean Air
Scientific Advisory Committee and CASAC’s Ozone Review Panel.CASAC advised the EPA Administrator on
the scientific basis for revising the ozone standard.
·Dr. Frey spoke as an invited lecturer in the 2015 Warren
Lecture Series at the University of Minnesota on October 16, 2015.His lecture regarding “Measurement and
Modeling of Real-World Onroad Vehicle Activity and Emissions” is available
as a YouTube video.
·Dr. Frey and others co-hosted a tour of the NCDOT rail yard during the
June 2015 annual meeting of the Air & Waste Management
Association.This tour featured
methods and results from 8 years of research by NCSU on emissions from
NCDOT owned and Amtrak operated railroad locomotives.
·Research by Dr. Frey’s group is featured in an
article about the role of the NC State Department of Civil, Construction,
and Environmental Engineering at the June 2015 Annual Meeting of the Air
& Waste Management Association.
·Dr. Frey shared a best paper award at the 2015 Annual
Meeting of the Transportation Research Board.
·Dr. Frey and colleagues developed a new modeling framework for estimating the
effect of transportation infrastructure, traffic control measures, and
traffic operations on vehicle emissions.
student Wan Jiao has received a Student Travel Award from the Society for
Risk Analysis to attend and present a paper at the SRA Annual Meeting in
San Francisco in December.
·June 2012.Dr. H.
Christopher Frey, a professor in the Department of Civil, Construction, and
Environmental Engineering, received the 2012 Lyman A. Ripperton
Environmental Educator Award of the Air & Waste Management Association
at the Association’s annual meeting in San Antonio, TX.The award is given each year to an
influential educator in an air pollution control field.See NCSU Press Release for more…
environmental engineering graduate students of Dr. Frey’s research group
and of the NCSU Chapter of the Air & Waste Management Association
presented technical papers at the 105th Annual Meeting of A&WMA in San Antonio, TX in June.Each received travel scholarships from
the RTP Chapter and South Atlantic States Section of A&WMA.Wan Jiao spoke on quantifying human
exposure to fine particulate matter in ambient air.Brandon Graver, Bin Liu, and BehdadYazdani presented
papers on various aspects of vehicle emissions, including measurement of
railroad locomotive emissions, modeling of highway vehicle emissions, and
quantification of the effect of road grade on emissions.
research from North Carolina State University shows that federal
requirements governing diesel engines of new tractor trailer trucks have
resulted in major cuts in emissions of particulate matter (PM) and nitrogen
oxides (NOx) – pollutants that have significant human health and
environmental impacts.Frey and
Ph.D. student Gurdas Sandhu used a portable
emissions measurement system to sample exhaust from diesel trucks while the
trucks were in use on roads and highways.Compared to a 1999 truck, a 2010 truck emitted 98 percent less NOx,
and the PM emissions were 95 percent lower.See NCSU Press Release for more…
Jiao, a Ph.D. student working with Dr. H. Christopher Frey in the
Department of Civil, Construction, and Environmental Engineering at NC
State, received the Student Merit Award from the Exposure Assessment Specialty
Group of the Society for Risk Analysis (SRA) at SRA's Annual Meeting in
Charleston, SC on December 7, 2011. Ms. Jiao presented a paper on
"Assessment of Inter-individual, Geographic, and Seasonal Variability
in Estimated Human Exposure to PM2.5." PM2.5
refers to small particles in the air that can be inhaled into the lung,
leading to the risk of adverse health effects. Ms. Jiao also received
Student Travel Awards from SRA and from the Research Triangle Chapter of
SRA. The Society for Risk Analysis is a
multidisciplinary, interdisciplinary, scholarly, international society that
provides an open forum for all those who are interested in risk analysis.
Christopher Frey was reappointed by U.S. Environmental Protection Agency
Administrator Lisa Jackson to a second three‐year term on the
Clean Air Scientific Advisory Committee (CASAC). CASAC advises EPA on
science pertaining to the National Ambient Air Quality Standards. Frey is
currently chairing CASAC’s Lead Review Panel and is a member of CASAC’s
Ozone Review Panel.
Graver, a Ph.D. student advised by Dr. H. Christopher Frey, won 2nd Place
for Best Paper at the Ph.D. level at the Annual Meeting of the Air &
Waste Management Association in Orlando, FL this past June. Graver’s paper
was on the energy use and emissions of a plug‐in hybrid vehicle.
State Chapter of the Air & Waste Management Association (A&WMA)
attended and presented nine technical papers in the main program of the
Association’s Annual Meeting during June 21‐23, 2011 in
·Brandon Graver, an MS student working with Dr. Frey, was
featured in the Southeastern Transportation Center’s Summer 2010 Research Spotlight for his work on
measuring the activity, energy use, and emissions of passenger railroad
·Dr. Frey is starting a new collaborative research
project, with Co-PI Dr. Nagui M. Rouphail, that will focus on the linkage between travel
simulation and vehicle emissions models and their application to evaluation
of traffic management strategies and emissions impacts.The new project is sponsored by the U.S.
Environmental Protection Agency and was selected via a scientific peer review
process under the STAR grants program.The project will be administered as a cooperative agreement with the
·Brandon Graver, an MS student working with Dr. H.
Christopher Frey, received the first place Masters level platform paper
award at the 2010 Annual Meeting of the Air & Waste Management
·Dr. Frey and colleagues have recently published in Transportation Research Record a
methodology for inventorying construction fleet emissions.The method is based on the use of
representative real-world measurements of construction vehicles obtained by
means of a portable emissions measurement system (PEMS).Recommendations are made about
development and practical applications of emissions inventories for
construction fleet management.
·In addition to previous studies in Dr. Frey’s group that
compared energy use and emissions of dump trucks and construction vehicles fueled with B20 biodiesel versus petroleum diesel,
we have recently published a similar study in Transportation Research – Part D that focuses on eight cement mixers.These three studies include a combined
total of 35 vehicles that were tested for approximately one day on each of
the two fuels.In general, these
studies support the finding from dynamometer tests that substitution of B20
for petroleum diesel leads to reductions in tailpipe emissions of carbon
monoxide, hydrocarbons, and particulate matter.While there are differences in the effect
of B20 on the emissions of nitrogen oxides from one vehicle to another, on
average there was little change.These studies also establish duty cycles for multiple types of
vehicles, including dump trucks, cement mixers, front-end loaders,
backhoes, and motor graders.The
newly measured duty cycles, coupled with modal emission rates obtained from
in-use measurements using Portable Emission Measurement Systems, enable
estimation of the effect of variations in vehicle operations on emissions.Dr. Frey and recent Ph.D. graduate Po-Yao Kuo have completed an assessment of avoided fuel use
and emissions for anti-idling methods for long-haul freight trucks, in
collaboration with the NC Solar Center and Volvo Technology of North
America.This assessment is based on
real world data from 20 instrumented trucks.See the November 6, 2008 press release, a video, and access the project final report.See also a recent presentation.
·In August 2008, Dr. Frey was selected to serve on a National
Research Council committee that will assess methodology for quantifying
uncertainty in the health effects of air pollutants.See NCSU press release.
·Dr. Frey moderated a panel session on the new Energy Economy, sponsored by the
student group Net Impact and the NCSU College of Management.The session was held Friday, April 25, 2008 at in 3400 Nelson Hall.
·Dr. Frey delivered the Chairman’s Air Pollution Seminarat the California Air Resources Board
in Sacramento, CA on January
9, 2008 on the topic of “Identification and Evaluation of
Potential Best Practices for Greenhouse Gas Reductions in Freight
Transportation.”The related final report is available,
“Best Practices Guidebook for Greenhouse Gas Reductions in Freight
2006.Frey Begins 12 Month
Assignment at U.S.
Environmental Protection Agency.Dr. H. Christopher
Frey began a 12 month sabbatical from NC State to the U.S. Environmental
Protection Agency on August
16, 2006 at the EPA’s National Exposure Research Laboratory
(NERL) in Research Triangle Park,
NC.While at NERL, Dr. Frey co-led an
agency-wide working group on the role of probabilistic risk assessment in
regulatory decision making and contributed to collaborative research with
EPA scientists on quantifying uncertainty in integrated modeling of air
pollutant emissions, air quality, human exposure
to air pollutant, and health effects.Dr. Frey also participated in numerous other activities, such as
leading a working group at a November 2006 workshop on uncertainty in
models used to assess climate change.
2004:Frey Elected President of the
Society for Risk Analysis.Dr. Frey was
elected to a three-year term in 2004 to 2006 as President-Elect, President,
and Past-President of the Society for Risk
multidisciplinary scholarly society, the Society for Risk Analysis provides
an open forum for researchers in the area of risk analysis, which includes
risk assessment, characterization, communication, management and
Appointed to EPA Scientific Advisory Panel on Pesticides.Dr. H. Christopher Frey was appointed to
the US Environmental Protection Agency’s Federal Insecticide, Fungicide and
Rodenticide Act (FIFRA) scientific advisory panel.The panel serves as the primary
scientific peer review mechanism for the EPA Office of Prevention,
Pesticides and Toxic Substances and provides recommendations to the EPA
concerning pesticide impact on health and the environment. Frey, an
internationally recognized expert in probabilistic exposure assessment, was
nominated for membership by the National Institutes of Health and began his
term on April 30, 2004.He continued on the panel until August 15, 2006.
1999:Frey Receives SRA’s Chauncey
Starr Award.Dr. H.
Christopher Frey was selected to receive the 1999 Chauncey Starr Award from
the Society for Risk Analysis (SRA). The award honors an individual under
the age of 40 who has made exceptional contributions to the field of risk
analysis. The award is named after Chauncey Starr, the founding president
of the Electric Power Research Institute, and a pioneer in the field of
risk analysis. The Society of Risk Analysis was established in 1980, with
more than 2,000 members world-wide. The award was presented at the SRA
Annual Meeting in Atlanta,
December 7, 1999.
Serves on IPCC Expert Working Group.Dr. H. Christopher Frey contributed to the development of the Best
Practice Guidelines of the National Greenhouse Gas Inventory Program of the
Intergovermental Panel on Climate Change
Invited to NAE Frontiers of Engineering Symposium.Dr. H. Christopher Frey was an invited
participant in the National Academy of Engineering’s (NAE’s) 5th
Annual Symposium on Frontiers of Engineering (FoE),
held in Irvine, California.Participants in FoE symposia are selected
via a nomination process and attendance is limited in order to encourage
interaction among emerging leaders in engineering.
and Colleagues Pioneer Research on Real-World Vehicle Emissions.See related story.
Receives NSF CAREER Award.Dr.
H. Christopher Frey of Raleigh
received a Faculty Early Career Development (CAREER) Award from the
National Science Foundation. The prestigious CAREER Award, which replaces
the NSF Young Investigator Award, recognizes and supports research by
junior faculty.Frey used the award
to support research on, "New Methods for Systems Analysis of
Environmental Technologies." The research program focuses on pollution
prevention and involves development of engineering-economic models of clean
technologies and new technology analysis and optimization methods that deal
with uncertainty. Frey also will create detailed case studies to illustrate
the use of the new system models. "The goal is to achieve lower
emissions and minimize costs through better process design," said
Frey. "The research will also yield more realistic estimates of
technology capabilities, emissions and costs needed by industrial and
regional governmental planners in order to develop cost efficient air quality