Table 3.

Pairwise correlations between deviated (community-centered) pollutants levels and potential predictors.

Predictors	EC_2.5^a	EC_0.2^a	PM_2.5^a	PM_0.2^a
CALINE4^a
Freeway	0.69 ^**	0.65 ^**	0.39 ^**	0.29 ^**
Non-freeway	0.35 ^**	0.39 ^**	0.16	0.16
Total	0.72 ^**	0.71 ^**	0.41 ^**	0.28 ^**
Distance
Freeway	-0.49 ^**	-0.48 ^**	-0.23 ^**	-0.21 ^*
Large arterial roads	-0.04	-0.16	-0.10	-0.01
Traffic density^a
150m buffer	0.49 ^**	0.57 ^**	0.34 ^**	0.14
300m buffer	0.53 ^**	0.54 ^**	0.30 ^**	0.15
Freeway truck count	0.17 ^*	0.17 ^*	0.26 ^**	0.17
Road buffers (all roads)
50m	0.23 ^**	0.26 ^**	0.22 ^*	0.26 ^**
100m	0.33 ^**	0.35 ^**	0.28 ^**	0.14
150m	0.33 ^**	0.37 ^**	0.22 ^*	0.08
200m	0.33 ^**	0.37 ^**	0.22 ^*	0.08
250m	0.31 ^**	0.35 ^**	0.20 ^*	0.07
300m	0.33 ^**	0.34 ^**	0.17	0.07
Elevation	-0.45 ^**	-0.47 ^**	-0.36 ^**	-0.22 ^**
Population density (300m buffer)	0.33 ^**	0.27 ^**	0.30 ^**	0.26 ^**
Normalized difference vegetation index (NDVI)	-0.29 ^**	-0.24 ^**	-0.19 ^*	-0.05
Distance to railway	-0.40 ^**	-0.44 ^**	-0.18 ^*	-0.17
Distance to intermodal facility (weighted)	-0.21 ^*	-0.26 ^**	-0.15	-0.14
Distance to point source of NO_x (10-50 tons/yr)	-0.11	-0.03	-0.04	-0.18 ^*

On log scale (and in all following tables).

p-value<0.05;

^**

p-value<0.01