The map on the left is from the City of Ottawa's EMME/2 tool using 1995 traffic data. It shows the daily emissions per roadway for the Ottawa-Gatineau area. The volume of emissions on a road is represented by the thickness of the line. The Queensway is easily identified as the thickest line on the map (running roughly diagonally from the lower left to upper right).

In Ottawa, most of our air pollution comes from vehicles because we have no heavy industry. As can be seen from this map. The Queensway is Ottawa's largest single daily source of both green house gases and pollution.

For instance, the Queensway currently contributes roughly 16% of all the carbon monoxide emission for all roads for the region. By 2021 it is expected the Queensway 's share of carbon monoxide from roads could rise to 36%.