Table 2.

Average, standard deviation, range, and 5-95^thpercentile of pollutant exposures for low and high-traffic routes

Pollutant	N*	Mean ± SD	Min	Max	5th– 95th
UFPM – #/cm3
Low-traffic	9	14,311 ± 15,381	2,771	376,495	4,621-29,882
High-traffic	9	18,545 ± 42,482	1,900	1,033,188	4,148-51,265
CO – ppm
Low-traffic	8	0.79 ± 0.39	0.20	4.90	0.40-1.50
High-traffic	10	0.90 ± 0.64	0.10	10.60	0.40-1.90
PM2.5 – μg/m3
Low-traffic	6	4.88 ± 1.41	2.25	20.96	2.65-6.84
High-traffic	8	5.12 ± 1.86	2.25	27.40	2.94-7.10
BC – μg/m3
Low-traffic	9	1.76 ± 2.58	0.11	63.83	0.50-4.03
High-traffic	10	2.06 ± 3.23	0.1	53.53	0.37-5.06

* N = number of sampling days with valid pollutant data (varied due to equipment failures).