Table 2.

Parameters Included in LUR Models

Parameter	Montreal			Toronto
	UFP number	UFP size	BC	UFP number	UFP size	BC
Average traffic NOx emissions within 100 m			x	x	x	x
Total traffic NOx emissions within 100 m	x	x
Building area within 100 m	x	x		x	x	x
Building area within 300 m			x
Length of bus routes within 100 m		x	x	x	x	x
Length of bus routes within 300 m	x
Number of bus stops within 100 m		x			x	x
Number of bus stops within 300 m			x
Commercial area within 100 m	x	x	x
Commercial area within 300 m						x
Distance to nearest highway			x
Distance to nearest NOx NPRI chimney					x
Distance to nearest PM NPRI chimney	x	x	x	x	x	x
Distance to nearest port		x		x	x
Distance to nearest railroad	x			x		x
Distance to nearest shore	x	x	x
Governmental area within 100 m				x	x	x
Governmental area within 200 m			x
Governmental area within 300 m	x	x
Length of highways within 300 m	x	x
Industrial area within 300 m		x		x	x
Length of major roads within 100 m			x		x
Length of major roads within 300 m	x	x
Number of traffic intersections within 100 m	x	x	x		x
Number of traffic intersections within 200 m						x
Number of NOx NPRI chimneys within 200 m	x	x			x
Number of PM NPRI chimneys within 200 m	x	x
Open area within 100 m	x	x	x
Open area within 300 m				x	x	x
Park area within 100 m				x	x
Population within 100 m	x		x
Population within 300 m		x		x	x	x
Length of railroad within 100 m				x
Length of railroad within 300 m		x			x
Residential area within 100 m	x	x	x	x	x	x
Number of restaurants within 200 m						x
Number of restaurants within 300 m	x	x	x	x
Length of roads within 200 m	x	x			x
Water area within 300 m	x	x	x
Latitude	x	x	x	x	x	x
Longitude	x	x	x	x	x	x
Temperature	x	x	x	x	x	x
Wind speed	x	x	x	x	x	x
Humidity	x	x	x	x	x	x

BC = black carbon; LUR = land use regression; NO_x = nitrogen oxides; NPRI = National Pollutant Release Inventory; PM = particulate matter; UFP = ultrafine particles.