Marianne Hatzopoulou


Canada Research Chair in Transportation and Air Quality
Head of the Transportation and Air Quality research group

Visit the Facebook page of the Transportation and Air Quality Research Group 

The research of the TRAQ research group was recently featured in the documentary Something in the Air, The Nature of Things:

Marianne Hatzopoulou1

Marianne Hatzopoulou
Department of Civil & Mineral Engineering
University of Toronto
35 St. George St.
Toronto, Ontario
Canada, M5S 1A4

Tel.: 416-978-0864


My research area bridges between transportation and environmental analysis; and my main expertise is in modelling of road transport emissions and urban air quality as well as evaluating population exposure to air pollution. I am interested in capturing the interactions between the daily activities and travel patterns of urban dwellers and the generation and dispersion of traffic emissions in urban environments. I lead an active research group focusing on modelling traffic emissions and near-road air quality as well as near-road air pollution monitoring and characterization.


BSc (Physics, American University of Beirut, 1999)
MSc (Envtal Technology, Civil Eng., American University of Beirut, 2001)
PhD (Transportation Engineering, Civil Eng., University of Toronto, 2008)
Postdoctoral training (University of Toronto, 2009)
Postdoctoral training (Massachusetts Institute of Technology, 2010)

Research Interests

Traffic-Related Air Pollution

Urban Air Quality

Transportation Engineering

Transportation Planning


An WangPhD Candidate

My current research mainly focuses on regional emission inventory estimation and developing modeling chain that bridges traffic assignment, emission calculation, dispersion modeling, exposure and health risk analysis. I am also interested in the energy and environmental impacts of various low-carbon policies and technological trends, especially electrification of transportation system.

Ran Tu, PhD Candidate

Recipient of the 2016-2017: Dr. Mazen Hassounah Graduate Scholarship and the 2017-2018: Dr. M. Hassounah Graduate Scholarship

My PhD research is focused on the improvement of current emission models, and urban traffic policies for emission reduction. I am also interested in air quality related traffic control with emerging technologies, such as autonomous vehicles, and shared mobility.

Laura Minet, PhD Candidate

Recipient of the 2017-2018: Dr. Mazen Hassounah Graduate Scholarship

My research focuses on characterizing ambient air quality to determine population exposure to air pollution. I conduct measurements to understand the relationship between air pollutant levels and the built environment. I also develop dispersion models based on traffic-related air pollutants emissions to develop exposure surfaces and identify hot spots of air pollution.


Junshi Xu, PhD Candidate

Recipient of the Mitacs Globalink Graduate Fellowship (2016-2019)

My research mainly focuses on the development of vehicle emission factors through on-board emission measurements and the generation of real-world drive cycles. My research also involves traffic simulation, emission modelling, and air quality modelling. Besides, I have conducted field measurements to investigate the effects of meteorology, built environment, and traffic on near-road air quality.

Arman Ganji, Research Associate

Monisha Alam, PhD Candidate

Recipient of  NSERC PGS D3 (September, 2018 to August, 2021)

Yijun Gai, MASc Candidate

Recipient of the 2017 Jack and Evelyn Tomlinson Scholarship

Marc Saleh, MASc Candidate

My current research focuses on modelling the potential impact of environmental policies at the regional level. These policies vary from investigating the traffic emissions of freight demand management strategies; to understanding the potential impact of vehicle autonomy on vehicle ownership and their respective emissions.

Research in Images

Distribution of ambient NO2 across the Montreal Island

Distribution of Black Carbon levels across Toronto

Distribution of ultrafine particles in Toronto

Black Carbon across cycling routes in Toronto

Ultrafine particles along cycling routes in Toronto

Testing Aeroqual S500 sensors againts fixed station (RSQA) in Montreal

Thesis Abstracts for TRAQ Graduates (MASc and PhD)



Course CodeTitle & DescriptionSessionDay(s)Start TimeEndSection
Fall 2020Friday11:0012:00LEC 9101 SYNC
Winter 2021Friday12:0013:00LEC 9101 SYNC
Not offered in 2020-20210101
CME261HFall 2020Scheduled by the Office of the Faculty Registrar.


Modelling the health benefits of electric cars

Electric vehicles are often touted as a means of mitigating climate change, but a new modelling study suggests that their public health benefits may be just as significant. “Local air pollution within urban environments is highly detrimental to human health,” says Professor Marianne Hatzopoulou (CivMin), who led the research. “When you have an electric vehicle with no tailpipe emissions,… Read more »

CivMin students Alaa Itani and Junshi Xu among DiDi Graduate Awards

  Two CivMin students are among ten University of Toronto graduate students who are receiving DiDi Graduate Awards in recognition of their contributions to the fields of artificial intelligence, vehicle autonomy, transportation analytics, human-machine interfacing and related topics. They are the first U of T students to receive scholarships from Beijing-based Didi Chuxing, the world’s… Read more »

A streetcar stops on King Street in Toronto. A section of the busy east-west street travelling through downtown Toronto has restricted car traffic, and U of T Engineering researchers are collaborating with the City of Toronto and the Toronto Transit Commission to study the pilot project’s effects. (Credit: Billy Cabic via Flickr under creative commons license)

Crunching the numbers on Toronto’s King Street transit pilot

Toronto’s King Street transit pilot project aims to improve transit reliability, speed and capacity, along with a number of other measures included in a comprehensive evaluation and monitoring program. For a team of researchers, it also presents an ideal opportunity to study the effects — both direct and indirect — of traffic changes on air and noise pollution,… Read more »