Workshop: Ultrafine Particle Emissions from Transportation

Date and time: September 18th, 2019, 1:00 pm to 4:00 pm

Location: University of Toronto St. George campus (building and room TBD)

Hosts: Pollution Probe and University of Toronto Transportation and Air Quality Research Group

While much of the recent conversation in Canada around transportation emissions has been focused on greenhouse gases (GHG), the potential impacts of air pollution emissions on human health have received comparatively little attention. GHG emissions have been steadily declining in most vehicle classes, however, there are concerns that the introduction of certain fuel-saving technologies, such as gasoline direct injection (GDI) engines and turbochargers, has inadvertently caused a major spike in emissions of ultrafine particles (UFPs), which can cause adverse health impacts.    


Company team

Marianne Hatzopoulou

Dr. Hatzopoulou is a Canada Research Chair in Transportation and Air Quality and Associate Professor in the Civil and Mineral Engineering Department, University of Toronto. She leads the Transportation and Air Quality (TRAQ) research group with expertise in modelling road transport emissions and urban air quality as well as evaluating population exposure to air pollution.  

Company team

Derek May

Since joining Pollution Probe as a Project Manager in 2013, Derek has led a number of files focused on reducing emissions from transportation sectors including light-duty, heavy-duty, and off-road vehicles, as well as rail. Derek has developed strategies and tools to facilitate the deployment of low-carbon vehicles, such as EVs, as well as low-carbon fuels. He also represents Pollution Probe in several expert transportation committees and working groups.



12:30  – 13:00


13:00  – 13:15

Opening remarks from workshop hosts

13:15  – 13:35

Presentation 1: UFPs from transportation: Sources and trends

  • Emissions from new technologies (e.g., UFP emissions from gasoline direct injection (GDI) light-duty vehicles and diesel vehicles with catalyzed diesel particle filters)

13:35  – 13:55

Presentation 2: Human health impacts of UFPs


13:55  – 14:15

Presentation 3: UFP Measurement, characterization and monitoring

         Existing technologies and methods to measure and characterize UFPs. Are we monitoring UFPs? What are the barriers (e.g., technological and other aspects)?

14:15  – 14:30


14:30  – 14:50

Presentation 4: UFP Mitigation - Technologies and strategies

          Methods such as gasoline particulate filters (GPFs) and vehicle electrification

14:50  – 15:10

Presentation 5: UFP Mitigation - International and domestic policy opportunities


15:10  – 15:55

Panel Discussion :

          · Moderators:

o   Steve McCauley , Senior Director, Policy, Pollution Probe

o   Marianne Hatzopoulou, Associate Professor, Civil Engineering Department, University of Toronto; Canada Research Chair in Transportation and Air Quality

         ·  Potential questions:

o   What research is needed to support a broader understanding of UFPs from transportation?

o   Are there research studies that are required and could benefit from collaboration?

o   What are the most effective mitigation strategies (e.g., technology, policy approaches)?

o   What next steps are recommended?

15:55  – 16:00

Closing Remarks and Next Steps

If you are interested in attending, please RSVP on the workshop’s Eventbrite page to receive further details. The workshop is free of charge.


Metered parking is available along King’s College Circle, Tower Road and Hart House Circle. Please visit the U of T Parking information site for up-to-date pricing and rates.

Odoo • Image and Text

Directions by TTC

The closest subway stop is Museum. Walk south from the Museum stop on the west side of University Ave., cross Hoskin Ave. and continue south on Queen’s Park Circle. Take the pathway leading to the right into the campus. Go down the steps and you are right in front of Hart House.

Alternatively, from St. George subway station, take the Bedford exit and head south on Bedford Rd. towards Bloor St. Turn right onto Bloor St. W. and left at Devonshire Pl. Turn left on Hoskin Ave. and turn right on Tower Road followed by a left toward the front of Hart House.