Before-and-After Field Investigation of the Effects on Pollutant Emissions of Replacing a Signal-Controlled Road Intersection with a Roundabout

Table 14

Probabilities of (mg) ≥ 76 mg (traffic condition = peak).

Probability of; (mg) ≥ 76 mg	Intersection	Driver	Trip direction
14.2%	Signalized	D1	A
27.6%	Signalized	D1	B
28.7%	Roundabout	D1	A
41.4%	Signalized	D2	A
48.0%	Roundabout	D1	B
61.8%	Signalized	D2	B
63.1%	Roundabout	D2	A
79.7%	Roundabout	D2	B