Table 1.

Statistical measures of model performance in 2006 at KS-kerbside sites, RS-roadside sites, SU-suburban sites and UB-urban background sites.

Pollutant	Site	n	FAC2	MB (ppb)	NMB	RMSE (%)	r
NO2	All	80	0.73	−4.7	−0.17	17.7	0.58
O3	All	34	0.61	2.8	0.15	12.1	0.64
NO2	KS	7	0.64	−19.0	−0.39	38.1	0.58
NO2	RS	38	0.75	−5.0	−0.17	16.3	0.56
NO2	SU	13	0.71	−0.8	−0.05	10.8	0.58
NO2	UB	22	0.74	−2.1	−0.10	12.3	0.55
O3	KS	1	0.37	5.6	0.68	11.1	0.50
O3	RS	9	0.60	3.0	0.17	11.9	0.59
O3	SU	10	0.66	2.7	0.13	12.4	0.65
O3	UB	14	0.61	2.6	0.14	12.1	0.64